Choose a calculator
- Date & Time Difference CalculatorThe exact gap between two dates and times, with time zones.
- Days Between Dates CalculatorCount the days between any two dates, with or without the end date.
- Business Days CalculatorWorking days between two dates, minus weekends and public holidays.
- Weeks Between Dates CalculatorWeeks and days between two dates, plus ISO week numbers.
- Hours Between Times CalculatorHours worked between two times, with breaks, overnight shifts and decimal hours.
- Add or Subtract Days from a DateFind the date that is N days, weeks, months, years or business days away.
- Age CalculatorExact age in years, months and days, plus your next birthday.
Which calculator should I use?
- “How many days between these two dates?” Use the Days Between Dates Calculator.
- “How many working days?” Use the Business Days Calculator, which skips weekends and holidays.
- “What is the date 90 days from now?” Use the Add or Subtract Days from a Date.
- “How many weeks is that?” Use the Weeks Between Dates Calculator.
- “How long was this shift?” Use the Hours Between Times Calculator.
- “How old am I exactly?” Use the Age Calculator.
- “What is the exact gap, including hours and time zones?” Use the Date & Time Difference Calculator.
Why use these calculators
Every calculator here runs in your browser, so the dates you type are never uploaded or stored. There is no sign-up, and each result can be copied, downloaded as a text file or shared as a link. Daylight saving, leap years and month lengths are handled for you.
Looking for something else? Docynx also has free PDF tools and image tools.
Frequently asked questions
Are these calculators free?
Yes. They are free, with no account and no limits.
Do the calculators handle leap years and daylight saving?
Yes. Leap days are counted, and the Date & Time Difference Calculator converts time zones and daylight-saving changes correctly.
Is my data private?
Yes. All calculations happen in your browser.