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Quick calculators

Calculate age to today, compare two dates, work out percentages and VAT, or convert file-size units using decimal upload units.

Calculate the difference between two dates in days, weeks, and a clear calendar interval.

Calculate age from a birth date to today in years, months, and days.

Calculate what percentage one number is of another, a percentage of a number, or the percentage change between two values.

Calculate prices before and after 15% VAT and show the tax amount. Verify the official rate if regulations change.

Convert file size between B, KB, MB, and GB using the decimal system commonly used for upload limits.