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Embeddable calculators
Click "Copy embed code" on any card, paste the snippet into your page, and the tool is live. You can also use the embedding guide for sizing and prefilled-URL tips.
20 of 20 calculators
Scale Converter Calculator
Convert real-world measurements to model dimensions and model dimensions back to real size using a 1:X scale ratio and clearly labeled length units, with named presets for architectural drawing scales and model railroad scales.
<iframe src="https://www.overcalculator.com/embed/calculators/scale-converter" width="100%" height="600" frameborder="0"></iframe>Open full calculatorPPI Calculator
Calculate display pixels per inch from pixel width, pixel height, and diagonal size, with aspect ratio, pixel diagonal, and screen area context.
<iframe src="https://www.overcalculator.com/embed/calculators/ppi" width="100%" height="600" frameborder="0"></iframe>Open full calculatorLegacy Bra Size Estimate
Use the named oc-bra-legacy-v1 two-measurement method as a non-universal try-on estimate, then verify fit with the intended manufacturer.
<iframe src="https://www.overcalculator.com/embed/calculators/bra-size" width="100%" height="600" frameborder="0"></iframe>Open full calculatorMatrix Calculator
Perform fixed 2 by 2 matrix addition, subtraction, multiplication, determinant, and transpose with formulas, examples, and singular-matrix notes.
<iframe src="https://www.overcalculator.com/embed/calculators/matrix" width="100%" height="600" frameborder="0"></iframe>Open full calculatorPercentage Calculator
Calculate percent of a number, what percent one value is of another, and percent change with clear formulas, examples, domains, and interpretation.
<iframe src="https://www.overcalculator.com/embed/calculators/percentage" width="100%" height="600" frameborder="0"></iframe>Open full calculatorGolden Ratio Face Calculator
Compare facial measurements against golden-ratio and facial-thirds proportions as an aesthetic novelty — a playful analysis, not a scientific beauty test.
<iframe src="https://www.overcalculator.com/embed/calculators/golden-ratio-face" width="100%" height="600" frameborder="0"></iframe>Open full calculatorRandom Number Generator
Generate pseudo-random integers or decimals within a chosen range, with optional no-duplicate draws for everyday sampling, games, and classroom examples.
<iframe src="https://www.overcalculator.com/embed/calculators/random-number" width="100%" height="600" frameborder="0"></iframe>Open full calculatorTip 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.
<iframe src="https://www.overcalculator.com/embed/calculators/tip" width="100%" height="600" frameborder="0"></iframe>Open full calculatorBMI Calculator (Adult Body Mass Index)
Calculate adult BMI from metric or imperial height and weight — body mass index formula, CDC categories, healthy weight range, and interpretation limits.
<iframe src="https://www.overcalculator.com/embed/calculators/bmi" width="100%" height="600" frameborder="0"></iframe>Open full calculatorMortgage Calculator
Estimate a fixed-rate mortgage payment with principal, interest, taxes, insurance, HOA dues, PMI, extra payments, payoff time, and total interest.
<iframe src="https://www.overcalculator.com/embed/calculators/mortgage" width="100%" height="600" frameborder="0"></iframe>Open full calculatorLoan Calculator
Estimate the monthly payment, total interest, total paid, and payment count for a fixed-rate amortized loan.
<iframe src="https://www.overcalculator.com/embed/calculators/loan" width="100%" height="600" frameborder="0"></iframe>Open full calculatorResting Energy Expenditure Calculator
Estimate predicted resting energy expenditure from age, sex, height, and weight using the page's Mifflin equations.
<iframe src="https://www.overcalculator.com/embed/calculators/calorie" width="100%" height="600" frameborder="0"></iframe>Open full calculatorAge Calculator
Calculate exact age in years, months, and days from a birth date to any age-at date, plus total months, weeks, days, weekday born, and next birthday.
<iframe src="https://www.overcalculator.com/embed/calculators/age" width="100%" height="600" frameborder="0"></iframe>Open full calculatorSalary Calculator
Convert gross pay across hourly, daily, weekly, biweekly, semi-monthly, monthly, quarterly, and yearly frequencies, with adjusted views for holidays and vacation days.
<iframe src="https://www.overcalculator.com/embed/calculators/salary" width="100%" height="600" frameborder="0"></iframe>Open full calculatorTime Converter: Seconds, Minutes, Hours, Days, Weeks
Convert seconds, minutes, hours, days, weeks, average months, or average years into any other supported time unit, with exact factors, worked examples, and calendar caveats.
<iframe src="https://www.overcalculator.com/embed/calculators/time" width="100%" height="600" frameborder="0"></iframe>Open full calculatorFraction Calculator
Add, subtract, multiply, and divide fractions with simplified results, mixed numbers, decimal values, denominator rules, and worked examples.
<iframe src="https://www.overcalculator.com/embed/calculators/fraction" width="100%" height="600" frameborder="0"></iframe>Open full calculatorCompound Interest Calculator
Calculate future value from a starting balance, annual rate, years, monthly contributions, and compounding frequency, with interest earned separated from total deposits.
<iframe src="https://www.overcalculator.com/embed/calculators/compound-interest" width="100%" height="600" frameborder="0"></iframe>Open full calculatorPercent Off Calculator
Calculate sale price and savings from an original price and advertised percent-off discount, with clear formulas for markdowns, stacked deals, tax, and final cost.
<iframe src="https://www.overcalculator.com/embed/calculators/percent-off" width="100%" height="600" frameborder="0"></iframe>Open full calculatorTDEE Calculator
Estimate TDEE (total daily energy expenditure) and maintenance calories from Mifflin-St Jeor BMR and activity level, plus mild 10% deficit and surplus targets.
<iframe src="https://www.overcalculator.com/embed/calculators/tdee" width="100%" height="600" frameborder="0"></iframe>Open full calculatorBMR Calculator
Estimate BMR with Mifflin-St Jeor and Harris-Benedict equations, then compare activity-adjusted daily energy estimates.
<iframe src="https://www.overcalculator.com/embed/calculators/bmr" width="100%" height="600" frameborder="0"></iframe>Open full calculator