Free Online Calculators

Work out percentages, convert length, weight, temperature and other units, count the days between two dates and compare times across time zones. Simple calculators that give the answer straight away.

4 tools

Percentage & VAT Calculator

Everyday percentages, VAT before and after tax, and discounts.

Unit Converter

Convert length, weight, temperature, area, volume, speed, data size and time.

Date Calculator

Calculate age, days between dates, add or subtract days and count working days.

Time Zone Converter

Convert times between cities and find a meeting time that suits everyone.