About Calcavi

Calcavi is a free collection of the calculators people use most, built to be clear and easy to trust.

Not just a number

Under every calculator we explain the rules and the formula behind the result, with worked examples using real figures, so you can see exactly where the answer comes from.

Kept up to date

Exchange rates come from the European Central Bank and the gold price from international market data, updated automatically. Yearly figures such as tax bands are updated when official announcements are made.

Please note

Results are for information only. For your exact pay, tax or contract figures, check with your employer, an accountant or the relevant authority.

Our sister sites

Folidesk (PDF tools) and Fotudio (image tools) are free tools built the same way.