Free tools

Simple calculators, no account and no ads. They run entirely in your browser — nothing you type is sent anywhere.

• Unit converterConvert lengths, masses, temperatures, areas, volumes and speeds between metric and imperial.
• Date calculatorDays between two dates, the date you land on after adding or subtracting days, and the countdown to an event.
• Percentage calculatorPercentage of an amount, percentage change, increase or decrease, and reverse VAT.