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Calculators

EMI, BMI, percentages, units, currency, and compound interest.

30 free calculators on Omnipus. Each one runs in your browser — no account, no upload unless the tool says it fetches a public URL.

Percentage calculatorWhat is x% of y, x is what percent of y, and percent change.BMI calculatorCompute body mass index in metric or imperial units.Age calculatorFind exact age in years, months, and days from a date of birth.EMI calculatorEstimate monthly loan payments, total interest, and payoff amount.Unit converterConvert length, weight, temperature, area, volume, speed, and data.Currency converterConvert between world currencies using ECB reference rates.
Compound interestProject how savings grow with compounding and regular deposits.Tip calculatorCalculate tip, tax, and per-person split from a restaurant bill.Scientific calculatorEvaluate expressions with sin, cos, tan, log, and powers.GPA calculatorAverage letter grades with credit hours.Calorie calculatorEstimate daily calories with Mifflin-St Jeor.Discount calculatorSee the sale price and how much you save.
Sales tax calculatorAdd or remove sales tax from a price.Hourly to salaryConvert an hourly wage to a yearly salary (and back).VAT calculatorAdd or extract VAT at 5, 10, 20% or a custom rate.Profit marginCompute margin and markup from cost and sell price.Aspect ratioSimplify width × height and scale to a target side.Number base converterConvert between binary, octal, decimal, and hex.
Pace calculatorFind run pace, time, or distance from the other two.Grade calculatorWeighted grades: what do you need on the final?Random numberDraw cryptographically random integers in a range.Fuel costEstimate trip fuel cost from distance, MPG, and price.Mortgage calculatorMonthly payment, interest, and payoff for a home loan.Simple interestI = P × r × t, plus the total amount due.
Date differenceDays, weeks, and months between two dates.Time zone converterConvert a time between IANA zones.Unix timestampConvert epoch seconds to a date, and back.Days untilCountdown in days to a target date.Countdown timerCount down to a date and time in this tab.StopwatchStart, pause, and lap a stopwatch.