Free Online Calculators & Math Tools
17 focused utilities for the things you actually calculate. Each one is instant, works offline-fast, and keeps nothing you type.
Popular
The ones people reach for most.
Everyday
The quick ones you reach for most.
Percentage CalculatorPercentages of a value, ratios, and increase or decrease.Age CalculatorYour exact age in years, months and days — plus your next birthday.Discount CalculatorSale price and how much you actually save.Date CalculatorDays between two dates, or add and subtract time from one.Time Duration CalculatorHours and minutes between two times, overnight shifts included.Download Time CalculatorHow long a file takes to download at a given connection speed.
Finance
Money, tax and loan maths.
GST CalculatorAdd GST to a price, or pull it back out of an inclusive one.EMI CalculatorMonthly instalment, total interest and what the loan really costs.Compound Interest CalculatorWhat an amount grows to, and the effective rate behind it.Simple Interest CalculatorInterest on the principal alone — SI = P × R × T / 100.Profit & Loss CalculatorProfit or loss from a cost and selling price, with the margin too.
Health
Simple body measurements.
Math
Full-strength calculation.
Conversion
Switch between units instantly.
Study
Marks, averages and exam arithmetic.