4 free tools
Calculators
Everyday calculators for ages, dates, percentages and Roman numerals. Every tool runs in your browser, so nothing is uploaded.
- Age CalculatorDATE → AGEFind an exact age in years, months and days on any date, with the total weeks and days lived and how long until the next birthday.
- Date Difference CalculatorDATE → DAYSCount the days between two dates, including weeks, months and working days, or add and subtract days, weeks, months or years from a date.
- Percentage Calculator% → RESULTSix everyday percentage calculations in one place: percent of a number, what percent, percentage change, increase, decrease and finding the whole.
- Roman Numeral Converter123 → XIIConvert numbers to Roman numerals and Roman numerals back to numbers, with a breakdown of each part.