All Tools

Calculate percentages quickly and for free.

Convert length, weight, and temperature units instantly, for free.

Find the percentage change between two numbers.

Calculate exact age in years, months and days.

Find the number of years, months and days between two dates.

Count business days between two dates, excluding weekends and holidays.

Work out the tip and total for a bill in seconds.

Split any bill evenly between friends, with an optional tip.

Find the sale price and savings for any discount.

Add or remove VAT/sales tax from any price.

Estimate monthly payments and total interest on a loan.

See how an investment grows with compound interest over time.

Calculate return on investment as a percentage.

Calculate profit and profit margin from revenue and cost.

Find how many units you need to sell to break even.

Calculate your Body Mass Index from height and weight.

Estimate your daily calorie needs to maintain, lose or gain weight.

Calculate running or walking pace and speed from distance and time.

Compare two products to find which is cheaper per unit.

Simplify a ratio or solve for a missing value in a proportion.

Calculate mean, median, mode and range from a list of numbers.

Add, subtract, multiply or divide two fractions.