Calculators that show their work

Percentage Calculator

Calculate X% of Y, find what percent one number is of another, and percentage change.

Percentage Increase Calculator

Calculate the percentage increase (or decrease) between two values.

Age Calculator

Exact age in years, months and days from a date of birth.

Days Between Dates

Count the days (and weeks) between two dates.

Compound Interest Calculator

Project savings growth with compound interest and monthly contributions.

Loan Calculator

Monthly payment, total cost and interest for a fixed-rate loan.

Everyday

Tip Calculator

Tip amount, total and per-person split for any bill.

VAT Calculator

Add or remove VAT at any rate: net, VAT and gross amounts.

Salary Calculator

Convert an hourly rate to annual, monthly and weekly salary.

Conversion

Unit Converter

Convert length, weight and temperature units instantly.

All tools

Percentages

Percentage Calculator

Calculate X% of Y, find what percent one number is of another, and percentage change.

Percentage Increase Calculator

Calculate the percentage increase (or decrease) between two values.

Percentage Difference Calculator

Calculate the percentage difference between two numbers, relative to their average.

Dates

Age Calculator

Exact age in years, months and days from a date of birth.

Date Calculator

Add or subtract days from a date to find the resulting date.

Days Between Dates

Count the days (and weeks) between two dates.

Time

Time Calculator

Add two durations together (hours and minutes).

Time

Hours Calculator

Calculate the hours and minutes between two clock times.

Finance

Compound Interest Calculator

Project savings growth with compound interest and monthly contributions.

Loan Calculator

Monthly payment, total cost and interest for a fixed-rate loan.

VAT Calculator

Add or remove VAT at any rate: net, VAT and gross amounts.