About OmniCalc

OmniCalc is a free collection of fast, accurate calculators and converters. Every tool runs entirely in your browser — there is no sign-up, and we never store the numbers you enter.

How we keep results trustworthy

• Each calculation engine is covered by automated tests with known-good cases.
• Country tax data shows its source and a “last verified” date.
• Results are clearly labelled as estimates, not professional advice.

Corrections

Spotted an error in a formula or a tax rate? We treat every report as a lead to verify against the official source.