Calculator terms glossary
Plain-language definitions of the formulas, units, and finance terms used across OverCalculator's calculators.
129 terms across 22 sections
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A–Z terms
A
A/G ratio
It turns two common blood chemistry values into an A/G ratio, albumin divided by calculated globulin.
Calculators: Albumin Globulin Ratio Calculator
ABI (Ankle-Brachial Index)
This ankle-brachial index calculator divides ankle systolic pressure by the highest arm systolic pressure, reports right and left ABI, and highlights the lower ABI.
Calculators: Ankle-Brachial Index (ABI) Calculator
Absence percentage
The absence percentage calculator measures the share of scheduled employee-days lost to absence.
Calculators: Absence Percentage Calculator
ABSI (A Body Shape Index)
ABSI is a research body-shape index built from waist circumference, height, and weight.
Calculators: ABSI (A Body Shape Index) Calculator
Accounting profit
Accounting profit is the profit a business reports after subtracting explicit, recorded costs from revenue.
Calculators: Accounting Profit Calculator
Accrual ratio
The accrual ratio calculator measures earnings quality from two different angles. The balance-sheet version compares the change in net operating assets with average net operating assets.
Calculators: Accrual Ratio Calculator
Acre
An acre is a land-area unit defined as 43,560 square feet.
Calculators: Acres to Square Feet Converter, Acres to Hectares Converter
Actual cash value
The Actual Cash Value Calculator produces a straight-line scenario estimate of depreciated value from three inputs: replacement or purchase cost, expected useful life, and current age.
Calculators: Actual Cash Value Calculator
ADR (Average Daily Rate)
Average Daily Rate, or ADR, is a lodging metric that answers a pricing question: how much room revenue did the hotel earn for each room-night sold?
Calculators: ADR Calculator (Average Daily Rate)
After-tax cost of debt
Estimate after-tax cost of debt from a before-tax borrowing rate, pre-tax income, and net income using the tax shield formula.
Calculators: After-Tax Cost of Debt Calculator
Age
The age calculator finds exact calendar age from a date of birth to any chosen age-at date.
Calculators: Age Calculator
Age difference
Calculate the age gap between two ages, birth years, or full birth dates, including years, months, days, and total days.
Calculators: Age Difference Calculator
AGI (Adjusted Gross Income)
The Adjusted Gross Income (AGI) Calculator estimates a simplified AGI by adding common income sources and subtracting above-the-line adjustments before standard or itemized deductions.
Calculators: Adjusted Gross Income (AGI) Calculator
Altman Z-Score
The Altman Z-Score calculator estimates a company's financial-distress signal from five weighted accounting and market ratios.
Calculators: Altman Z-Score Calculator
Amortization
An amortized loan is a debt with a planned route to zero. The payment stays level, but the hidden split changes every month: interest is taken first, and the rest reduces principal.
Calculators: Amortization Calculator, Mortgage Amortization Calculator
Angle units
This calculator converts that angle among four circular units: degrees, radians, gradians, and turns.
Calculators: Angle Converter Calculator
Angstrom
Atoms, crystal planes, and short electromagnetic wavelengths occupy a scale where a meter is far too large and even a micrometer feels distant. The Angstrom to nm converter translates those very small dimensions into nanometers while preserving the exact power-of-ten relationship.
Calculators: Angstrom to nm converter
Anion gap
The anion gap calculator subtracts the routinely measured anions from measured cations to estimate whether unmeasured ions are contributing to an acid-base disturbance.
Calculators: Anion Gap Calculator
Annual income
This annual income calculator is for building one gross yearly number from income that arrives on different schedules.
Calculators: Annual Income Calculator, Annual Salary per Hour Calculator
APR (Annual Percentage Rate)
Annual percentage rate is meant to put borrowing offers on a more comparable footing than the headline note rate alone.
Calculators: APR Calculator
APY (Annual Percentage Yield)
Annual percentage yield turns a stated annual rate into the return a saver actually earns after compounding.
Calculators: APY Calculator
B
Binge watching
Estimate how many 45-minute episodes and average 30-episode shows fit into a viewing period using daily or weekly watching time.
Calculators: Binge Watching Calculator
BMI (Body Mass Index)
This BMI calculator computes adult body mass index from metric or imperial height and weight using the standard formula: weight in kilograms divided by height in meters squared.
Calculators: BMI Calculator (Adult Body Mass Index)
BMR (Basal Metabolic Rate)
Basal metabolic rate estimates the calories your body would use at rest for basic functions such as breathing, circulation, temperature regulation, and cellular maintenance.
Calculators: BMR Calculator
Bra size
This tool retains oc-bra-legacy-v1, a nonstandard two-measurement estimate. Use it only to choose a first size to try.
Calculators: Legacy Bra Size Estimate
C
CAGR (Compound Annual Growth Rate)
CAGR, or compound annual growth rate, compresses a beginning value, ending value, and time period into one smoothed annual rate.
Calculators: CAGR Calculator (Compound Annual Growth Rate)
Calorie deficit
This page models a user-selected subtraction from an equation-based daily energy estimate. It shows arithmetic scenarios, not a prescribed intake or a forecast of actual weight change.
Calculators: Calorie Deficit Scenario Calculator
Capital gains yield
The capital gains yield calculator measures the price return on an asset from the bought price to the current price.
Calculators: Capital Gains Yield Calculator
Celsius
Celsius is convenient for weather reports, incubators, water baths, and ordinary thermometers.
Calculators: Celsius to Fahrenheit Calculator, Celsius to Kelvin Calculator, Temperature Converter
Child tax credit
The child tax credit calculator estimates a federal child and dependent credit using adjusted gross income, filing status, qualifying children, and other dependents.
Calculators: Child Tax Credit Calculator
Compound interest
Compound interest adds earned interest to the balance, so later periods earn interest on both the principal and prior interest. That reinvestment effect is why longer horizons can change the result dramatically, especially when the rate and contribution schedule stay consistent.
Calculators: Compound Interest Calculator
Concrete volume
Calculate concrete volume for slabs, columns, tubes, curbs, and stairs in cubic yards and cubic feet.
Calculators: Concrete Calculator, Concrete Volume Calculator
Cost of capital
Estimate a simplified company hurdle rate by adding the entered cost of debt and cost of equity, then compare it with an expected project return.
Calculators: Cost of Capital Calculator
Cubic centimeter (cc)
The cc to liter converter changes a cubic-centimeter volume into liters, a larger metric unit better suited to engines, reservoirs, bottles, tanks, and batch sizes.
Calculators: cc to Liter Converter
Currency conversion
It converts an entered amount among US dollar (USD), euro (EUR), British pound (GBP), Japanese yen (JPY), Swiss franc (CHF), and Canadian dollar (CAD).
Calculators: Currency Converter Calculator
D
Dividend
The dividend calculator estimates the income side of owning a dividend-paying stock. It begins with share price and annual dividend per share, converts them into dividend yield, then applies that yield to the amount invested over a selected number of years.
Calculators: Dividend Calculator
Dividend payout ratio
Calculate dividend payout ratio from total dividends and net income or from dividend per share and diluted EPS, with retention and earnings coverage.
Calculators: Dividend Payout Ratio Calculator
Dividend yield
The dividend yield calculator converts a stock's annual dividend per share into a percentage of its current share price.
Calculators: Dividend Yield Calculator
DTI (Debt-to-Income ratio)
Debt-to-income ratio, or DTI, is a personal lending ratio. It compares required monthly debt payments with gross monthly income before taxes.
Calculators: Debt to Income (DTI) Calculator
E
EBITDA
EBITDA translates operating profit into an earnings measure before depreciation and amortization.
Calculators: EBITDA Calculator
EBITDA margin
Calculate EBITDA margin from revenue and EBITDA, compare the result with an industry benchmark, and interpret operating profitability before financing and tax effects.
Calculators: EBITDA Margin Calculator
EBITDA multiple
Calculate enterprise value to EBITDA from market capitalization, debt, cash, minority interest, preferred shares, and EBITDA for valuation analysis.
Calculators: EBITDA Multiple Calculator
Effective annual yield
The effective annual yield calculator turns a bond's face value, annual coupon payment, and coupon frequency into an annualized coupon yield after compounding.
Calculators: Effective Annual Yield Calculator
Effective corporate tax rate
This effective corporate tax rate calculator measures a company's tax burden by dividing income tax paid or accrued by earnings before tax (EBT).
Calculators: Effective Corporate Tax Rate Calculator
Effective interest rate
The effective interest rate calculator converts a stated annual interest rate into the effective annual rate after compounding.
Calculators: Effective Interest Rate Calculator
Expected return
The expected return calculator computes a probability-weighted average return from investment scenarios.
Calculators: Expected Return Calculator
F
Fahrenheit
This page is for people starting with Celsius but needing the Fahrenheit scale used in U.S. weather reports, ovens, thermostats, swimming-pool readings, and many consumer thermometers.
Calculators: Celsius to Fahrenheit Calculator, Temperature Converter
Feet and inches
Feet and inches are a paired system. A foot is exactly 12 inches.
Calculators: Feet to Inches Calculator, Feet to Miles Converter
FICA
FICA generally refers to the payroll taxes that fund Social Security and Medicare. This calculator separates Social Security tax, Medicare tax, and Additional Medicare Tax for higher income.
Calculators: FICA Tax Calculator
Fluid ounce
This calculator converts US fluid ounces of volume to milliliters using 1 US fluid ounce = 29.5735295625 mL. A mass ounce is a different unit and is outside this calculator's scope.
Calculators: Ounces to Milliliters Calculator, Ounces to Grams Calculator
Future value
Future value answers the forward-looking version of the time value of money question: if you have one amount today, what could it become after a rate compounds for a chosen number of years?
Calculators: Future Value Calculator
G
Gallon
The Gallons to Liters Calculator converts US liquid gallons to liters using exactly 3.785411784 liters per US gallon, in either direction.
Calculators: Gallons to Liters Calculator
Golden ratio
The golden ratio face calculator compares facial measurements with a small set of golden-ratio and facial-thirds relationships.
Calculators: Golden Ratio Face Calculator
GPA (Grade Point Average)
A weighted GPA calculator turns a semester of letter grades into one number under a stated weighting policy.
Calculators: Weighted GPA Calculator
Gratuity
Calculate gratuity, total bill, and per-person split from a bill amount, tip percentage, and party size for restaurants, delivery, salons, rides, and other service bills.
Calculators: Tip Calculator
H
Hectare
Convert acres to hectares for US, UK, and Commonwealth land records that need a metric area result.
Calculators: Acres to Hectares Converter
I
Inch
The inch converter starts with an inch measurement and reports the same length in millimeters, centimeters, meters, feet, and yards.
Calculators: Inch Converter, mm to Inches Conversion, Metric to Inches Calculator
Inflation
The inflation calculator estimates how much a dollar amount changes between two years when prices rise or fall at an average annual rate.
Calculators: Inflation Calculator
K
Kelvin
Kelvin is the scale used when temperature enters formulas.
Calculators: Celsius to Kelvin Calculator, Kelvin to Fahrenheit Converter, Temperature Converter
Knot
A knot is one nautical mile per hour, while MPH uses the statute mile familiar from U.S. road signs.
Calculators: Knots to MPH Calculator, Knots to kph Converter
L
Liquid net worth
Liquid net worth measures financial flexibility. It asks how much accessible wealth remains after debts are subtracted from cash and marketable investments.
Calculators: Liquid Net Worth Calculator
Liter
Liters are the metric volume unit used on international labels, scientific notes, many appliance manuals, and most non-US fuel records.
Calculators: Gallons to Liters Calculator, cc to Liter Converter
Loan
This page is the general-purpose loan calculator for a standard amortized loan: one starting balance, one fixed annual rate, one repayment term, and equal monthly payments.
Calculators: Loan Calculator, Loan Payment Calculator
M
Macronutrients
The macro calculator turns basic body and lifestyle inputs into a daily calorie target, then splits that target into protein, fat, and carbohydrate grams.
Calculators: Macro Calculator, Macronutrient Calculator
Marginal cost
The marginal cost calculator turns an output decision into a per-unit cost. The result answers a narrow but important question: how much extra cost does each additional unit add?
Calculators: Marginal Cost Calculator
Marginal revenue
The marginal revenue calculator finds the revenue gained or lost for each unit in a quantity change.
Calculators: Marginal Revenue Calculator
Market capitalization
The market capitalization calculator estimates the public equity value of a company by multiplying the price of one share by the number of outstanding shares.
Calculators: Market Capitalization Calculator
Matrix
Matrix calculations compress several related arithmetic steps into a compact grid.
Calculators: Matrix Calculator
Metric system
The metric converter is the metric-system hub, not a generic unit portal. It converts within metric length, mass, and volume, emphasizing the decimal structure that makes metric work predictable.
Calculators: Metric Converter, Metric to Imperial Converter
Molarity
Divide moles of solute by the final solution volume in liters. The result is reported in M, meaning moles per liter, alongside the entered moles and volume so you can check them before copying the value.
Calculators: Molarity Calculator
Mortgage
This is the main OverCalculator mortgage payment page: it starts with a home price and down payment, builds the loan amount, computes the fixed principal-and-interest payment, and then layers in the monthly ownership costs that are entered directly in the inputs.
Calculators: Mortgage Calculator
N
Net effective rent
Net effective rent turns a lease with concessions into comparable monthly averages.
Calculators: Net Effective Rent Calculator
Net worth
Net worth is the household balance-sheet number: assets minus liabilities.
Calculators: Net Worth Calculator
Newton-meter
Convert inch-pounds-force to newton-meters for small torque wrench settings, bicycle parts, electronics hardware, and shop specifications.
Calculators: Inch-lbs to Nm converter
O
Ounce (avoirdupois)
Convert avoirdupois ounces to grams and grams to ounces for recipes, food labels, postage, lab notes, and package weights with practical rounding guidance.
Calculators: Ounces to Grams Calculator, Pounds to Kilograms Calculator
P
Pace
Calculate running pace, elapsed time, or distance for miles and kilometers.
Calculators: Running Pace Calculator, Pace Converter Calculator
Percentage change
A percentage change calculator measures how much a value moved relative to where it started.
Calculators: Percentage Change Calculator, Percentage Increase Calculator
Percentage difference
A percentage difference calculator measures the relative gap between two values when neither value deserves to be called the original.
Calculators: Percentage Difference Calculator
Percentage discount
The percentage discount calculator answers one focused question: if a listed price is reduced by one percent-off discount, what is the sale price and how much do you save?
Calculators: Percentage Discount Calculator
Percentage return
The percentage return calculator measures how much an investment gained or lost relative to the amount invested.
Calculators: Percentage Return Calculator
Pound (mass)
Convert pounds to kilograms for US body weight, medical forms, veterinary dosing, luggage, shipping, and metric records with the exact lb-to-kg factor.
Calculators: Pounds to Kilograms Calculator
PPI (Pixels Per Inch)
A PPI calculator converts a screen's pixel resolution and physical diagonal into pixels per inch, the standard shorthand for display pixel density.
Calculators: PPI Calculator
Present value
Present value brings a future dollar amount back to today. Instead of asking how a current balance grows, it asks what amount today would be equivalent to a known future lump sum after applying a discount rate.
Calculators: Present Value Calculator
PSI (Pounds per Square Inch)
The PSI Converter is a unit-family page for pressure values that start in pounds per square inch.
Calculators: PSI Converter
R
Random number
This tool creates one or many pseudo-random numbers between two endpoints, optionally rounded to a chosen number of decimal places.
Calculators: Random Number Generator
REE (Resting Energy Expenditure)
This page estimates predicted resting energy expenditure (REE) only.
Calculators: Resting Energy Expenditure Calculator
Rice water ratio
A dependable rice water ratio calculator saves dinner from two familiar failures: crunchy grains from too little water and a wet pot from too much.
Calculators: Rice Water Ratio Calculator
ROCE (Return on Capital Employed)
The ROCE calculator (return on capital employed) compares EBIT with the capital used to operate a business.
Calculators: ROCE Calculator (Return on Capital Employed)
ROI (Return on Investment)
ROI, or return on investment, is the broadest ratio in this batch because it can apply to almost any decision with an identifiable cost and an identifiable returned amount.
Calculators: ROI Calculator
ROIC (Return on Invested Capital)
Calculate return on invested capital from EBIT, tax rate, debt, and equity, including NOPAT, invested capital, and capital efficiency.
Calculators: ROIC Calculator (Return on Invested Capital)
Roman numerals
Roman numerals are one of the best-known non-positional numeral systems still seen in daily life. Instead of using place-value digits like 2, 0, 2, and 6, the system builds a number from seven symbols: I, V, X, L, C, D, and M.
Calculators: Roman Numerals Converter
Rule of 72
The Rule of 72 is a compact shortcut for one specific time value of money question: how long does steady compound growth take to double? Instead of calculating a future dollar value, it divides 72 by the growth rate expressed as a percent.
Calculators: Rule of 72 Calculator
S
Sales tax
Estimate U.S. point-of-sale sales tax from a pre-tax price and combined state and local rate, with tax amount, subtotal, and final receipt total.
Calculators: Sales Tax Calculator
Savings goal
Use this planner when you know current savings, a target balance, a timeline in months or years, and a nonnegative nominal annual rate. It solves for a fixed deposit made at the end of each month.
Calculators: Savings Goal Calculator
Scale ratio
A scale converter calculator translates measurements between real-world size and model, drawing, map, or miniature size.
Calculators: Scale Converter Calculator
Shot put distance (ideal scenario)
Explore an ideal projectile-flight scenario from values you enter. This mathematical result is not an actual or official shot-put distance.
Calculators: Shot Put Ideal-Flight Scenario Calculator
Simple interest
Use this worksheet when interest is applied only to the original principal, with no compounding.
Calculators: Simple Interest Calculator
Sleep schedule
This is a clock-planning aid, not a sleep recommendation. Choose whether to work backward from a wake-up time or forward from a bedtime, enter a 12-hour clock time, and set an offset from 0 to 120 minutes.
Calculators: Sleep Schedule Calculator
Slope
Slope is the line's rate of change: how much the vertical coordinate changes for each unit of horizontal change.
Calculators: Slope Calculator
Social Security
Estimate Social Security retirement benefits at age 62, full retirement age, and age 70 using simplified earnings history, AIME, PIA, and claiming-age adjustments.
Calculators: Social Security Retirement Calculator
Sound level
Convert between sone, phon, and dB sound levels with the calculator's 1 kHz assumption: dB equals phon at 1 kHz, and sone uses a logarithmic loudness formula.
Calculators: Sound Level Converter (dB, Phon, Sone)
Square foot
The Square Feet to Square Meters Calculator converts a floor, wall, roof, patio, or lot area from square feet into square meters using the same factor as the calculator: 1 sq ft = 0.09290304 m².
Calculators: Square Feet to Square Meters Calculator, Acres to Square Feet Converter
Standard deviation
Sample standard deviation is most meaningful when the data represent a sample from a larger process. It estimates how far observations typically fall from the mean in the same units as the data.
Calculators: Statistics Calculator
T
Tax bracket
Estimate U.S. federal income tax from income, deductions, filing status, and year, with marginal bracket, effective rate, and bracket-by-bracket tax.
Calculators: Tax Bracket Calculator
Tax-equivalent yield
The tax-equivalent yield calculator converts a tax-free bond yield into the taxable yield that would be needed to match it after applying your marginal tax rate.
Calculators: Tax-Equivalent Yield Calculator
TDEE (Total Daily Energy Expenditure)
Total daily energy expenditure is an estimate of the calories your body uses in a full day, including resting metabolism, digestion, everyday movement, and exercise. It is the number usually called your maintenance calories.
Calculators: TDEE Calculator
Time zone
Civil time is local: each region labels the same moment with its own date, hour, offset from UTC, and daylight saving rule.
Calculators: Time Zone Calculator
U
UTM (Universal Transverse Mercator)
UTM, the Universal Transverse Mercator system, describes most of the world as meter coordinates inside numbered zones.
Calculators: Lat Long to UTM Converter
V
VO2max
The VO2max estimator turns a 12-minute run or walk into an estimate of maximal oxygen uptake (VO2max) in ml/kg/min, the standard marker of cardiorespiratory fitness.
Calculators: VO2max Estimator (Cooper Test)
W
Water intake
This calculator estimates a practical daily fluid target from body weight, activity, climate, altitude, caffeine, pregnancy, and breastfeeding.
Calculators: Water Intake Calculator, Daily Water Intake Calculator
WHtR (Waist-to-Height Ratio)
The waist-to-height ratio calculator divides your waist circumference by your height to produce a single number, then places that number relative to the 0.5 screening threshold.
Calculators: Waist-to-Height Ratio Calculator
Wind chill
Calculate the wind chill factor — the NWS wind-chill temperature — from air temperature and wind speed when the observations fall inside the equation's stated scope.
Calculators: Wind Chill Factor Calculator
Working capital
The working capital calculator measures short-term liquidity by subtracting current liabilities from current assets.
Calculators: Working Capital Calculator, Working Capital Turnover Ratio Calculator
0–9
12-hour shift pay
Estimate pay for a 12-hour shift by splitting regular hours and overtime hours, then project weekly, monthly, and yearly gross earnings.
Calculators: 12-Hour Shift Pay Calculator
1RM
This one rep max calculator estimates your one-repetition maximum from a completed set using the Epley, Brzycki, and Lombardi formulas.
Calculators: One Rep Max (1RM) Calculator
2020 vision
The 2020 Vision Calculator is a lifestyle scoring tool, not an eye chart. It does not determine whether you have 20/20 visual acuity.
Calculators: 2020 Vision Calculator
28/36 rule
The 28/36 rule is a mortgage planning guideline built around two debt-to-income checks.
Calculators: 28/36 Rule Calculator
3x rent rule
The 3x rent calculator applies an editable screening multiple to a rental listing.
Calculators: 3x Rent Calculator
401(k)
A 401(k) is a workplace retirement plan, so the central question is different from a generic investment account: how much do employee salary deferrals, employer match dollars, and tax-deferred growth combine by the time you retire?
Calculators: 401(k) Calculator
403(b)
A 403(b) plan is the workplace retirement account many teachers, university employees, hospital staff, ministers, and nonprofit workers use instead of a private-sector 401(k).
Calculators: 403(b) Calculator
4Ts score
The 4Ts score calculator structures the first question: how likely is HIT before laboratory confirmation? It sums four clinical domains, returns a low, intermediate, or high band.
Calculators: 4Ts Score Calculator
50/30/20 rule
The 50/30/20 rule turns take-home pay into three memorable budget targets: half for needs, 30% for wants, and 20% for savings or extra debt repayment.
Calculators: 50/30/20 Rule Calculator
529 plan
The 529 College Savings Calculator estimates future education costs and a monthly savings target for a 529 plan scenario.
Calculators: 529 College Savings Calculator
6-minute walk test
Compare six-minute walk distance with sex-specific predicted values, lower limits, and percentage expected using the equations in the calculator form.
Calculators: 6 Minute Walk Test Calculator
70/20/10 rule
The 70/20/10 rule is a three-bucket budgeting method for after-tax income. It assigns 70% to living expenses, 20% to savings, investing, or debt payoff, and 10% to lifestyle or personal spending.
Calculators: 70/20/10 Rule Money Calculator
90-minute sleep cycle
This 90 minute sleep cycle calculator gives practical clock times built from an approximate cycle length plus your expected time to fall asleep.
Calculators: 90 Minute Sleep Cycle Calculator, 90-Minute Sleep Cycle Schedule Calculator