Financial tool map
Everyday money
Budgets, discounts, purchasing power, tips, and day-to-day comparisons.
Choose the tool whose inputs and output match your task. Check each calculator’s assumptions and limitations before using its result.
Basis Point Calculator
Convert basis points to percentage points, decimal value, permille, dollar impact, and the new rate after a bps change.
Consumer Surplus Calculator
Estimate consumer surplus per unit, total buyer surplus, and the linear demand triangle between willingness to pay and market price.
Cross Price Elasticity of Demand Calculator
Calculate cross price elasticity of demand with the midpoint method and interpret substitutes, complements, or weakly related goods.
Currency Forward Calculator
Estimate a theoretical FX forward price from spot, term, and two currency interest rates using the calculator's 360-day parity convention.
Deadweight Loss Calculator
Estimate deadweight loss as the triangular welfare loss from a price wedge and quantity change caused by taxes, controls, monopoly, or other distortions.
Discount Calculator
Compare percent-off, dollar-off, known final price, stacked, buy-more-get-free, and after-tax discounts with savings and effective discount shown.
Discount Rate Calculator
Solve the nominal annual discount rate that connects present value, future value, term, compounding frequency, and optional recurring cash flows.
Fisher Equation Calculator
Compute the exact Fisher equation real rate from a nominal interest rate and expected inflation, with the subtraction approximation shown for comparison.
GDP Deflator Calculator
Calculate the GDP deflator from nominal GDP and real GDP, then compare it with a previous deflator to estimate economy-wide price inflation.
Inflation Calculator
Estimate how an amount changes between years using an average annual inflation rate, including adjusted amount, dollar change, and total inflation factor.
Markdown Calculator
Find the retail markdown amount, markdown percentage, and sale-price share from an original selling price and actual selling price.
Money Counter Calculator
Total bills and coins by denomination, currency, and quantity with a line-by-line cash-count breakdown.
Money Supply Calculator
Build M0, monetary base, M1, M2, M3, M4, and money zero maturity from currency, deposits, money market funds, time deposits, and market instruments.
Month-over-Month Growth Calculator
Calculate month-over-month growth, absolute change, CMGR, and next-month projection from two monthly values with a clear MoM formula and example.
Moving Average Calculator
Calculate the latest simple moving average from a chronological price list, compare it with the latest price, and see whether the average is rising, falling, or flat.
Price Elasticity of Supply Calculator
Calculate price elasticity of supply with midpoint or standard percentage changes and interpret how responsive producers are to price changes.
Price/Quantity Calculator
Compare two package sizes by unit price, price difference, savings rate, and practical value before choosing the better buy.
Real GDP Calculator
Convert nominal GDP into inflation-adjusted real GDP with a GDP deflator, and see the price-level adjustment used in the calculation.
Scrap Gold Calculator
Calculate a gold-value scenario from entered weight, purity, price per troy ounce, and scenario percentage assumptions.
Software Contract Value Calculator
Calculate discounted SaaS seat price, monthly contract cost, annual contract value, total contract value, seats, and effective discount.
Spending Multiplier Calculator
Calculate a simplified classroom spending multiplier and modeled output change from MPC or MPS.
Taylor Rule Calculator
Calculate a generalized Taylor-type policy-rate benchmark from prior-four-quarter inflation and real-output inputs.
Time Value of Money Calculator
Move one lump sum between present and future value using periodic nominal or continuous compounding.
Tip Calculator
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.
Triple Discount Calculator
Combine three successive percentage discounts, show intermediate prices, and convert the stack into one equivalent single discount.
Velocity of Money Calculator
Evaluate a user-defined exchange-equation ratio using same-period, same-geography, same-currency inputs; it is not comparable to an official money-velocity series.
Week-over-Week Growth Calculator
Calculate week-over-week growth, absolute change, following-to-initial ratio, and weekly compound growth for short-term metrics.