Online calculators
Quick everyday calculations: percentages, age and time between dates.
- IP CalculatorEnter an IPv4 address and prefix to see the network it belongs to and what kind of address it is.
- Age CalculatorEnter a date of birth to get the exact age in years, months and days, and the date of the next birthday.
- Date Difference CalculatorWorks out how much time lies between two dates: in days, weeks, months, years, hours and minutes.
- Working Days CalculatorCounts Monday-to-Friday working days between two dates. Add your own holidays as a list.
- Percentage CalculatorThe five most common percentage problems on one page — no formulas, no decimal slip-ups.