Calculators tools

Solve every common percentage question: of, is what percent, and percent change.

Calculate the tip, total and per-person share for any bill.

Find the sale price and the exact amount saved from any discount.

Estimate monthly repayments, total interest and the full amortisation schedule.

Project savings growth with monthly contributions and any compounding frequency.

Count days, weeks, months and business days between two dates.

Calculate body mass index in metric or imperial units.

Estimate basal metabolic rate and daily calorie needs.

Add tax to a net amount or remove tax from a gross amount.

Convert length, weight, volume and temperature units.

Convert a local date and time between IANA time zones.

Convert bytes, kilobytes, megabytes, gigabytes and binary units.

Estimate trip fuel use and cost from distance, efficiency and price.

Calculate pace per kilometre, speed and race split times.

Calculate a credit-weighted GPA on the 4.0 scale.

Convert integers between bases 2 and 36.

Calculate exact age in years, months and days, plus days to the next birthday.

Calculate regular and overtime pay from an hourly rate and hours worked.

Estimate how long it takes to reach a savings target with monthly deposits.

Evaluate expressions with trigonometry, logs, powers and factorials.