Calculators

Quick answers for everyday numbers, units and dates.

Convert length, mass, area, volume, speed, temperature, time, energy, power and pressure.

Work out a percentage of a number, a percentage change, or the value before one.

Days, weeks, months and working days between two dates.

See one moment on the clock in several places at once, and compare working hours across teams.

Convert a Unix timestamp to a readable date and back, in seconds or milliseconds.

Convert between bytes, kB, MB, GB, TB and their binary cousins KiB, MiB, GiB and TiB.

Work with ALCO

Need more than a quick tool?

These are free and always will be. If one of them is solving a problem you keep having, the underlying issue is usually worth a conversation.