Calculate time differences, exact ages, business days, time durations, and custom countdowns. Every tool is free, instant, and works on any device — no signup required.
How many days between two dates?
Find the exact number of days, hours, minutes, and seconds between any two calendar dates. Handles leap years and multi-year ranges automatically. Results update in real time.
How old am I exactly?
Calculate your exact age in years, months, and days from any date of birth. Also shows your total days lived, total hours, and total minutes — and days until your next birthday.
How many working days between dates?
Count the exact number of business days between two dates. Excludes weekends automatically. Optional toggle to also exclude all 10 US federal holidays. Essential for project planning and payroll.
How many hours between two times?
Calculate the exact hours, minutes, and seconds between any two times of day. Supports overnight shifts — enter 10 PM to 6 AM and get the correct 8-hour result instantly.
Create a countdown to any event
Build a permanent, shareable countdown timer to any date or event. Add an event name, pick a date and time, and get a unique URL to bookmark or share with anyone.
This collection of time calculators covers the most common date and time calculations. Whether you need a date difference calculator to find days between two dates, an age calculator to find your exact age in years, months, and days, or a business days calculator to count working days for a project deadline — every tool gives you an instant, precise answer.
The time duration calculator is ideal for calculating hours worked across a shift, including overnight hours. The custom countdown generator lets you build a permanent countdown to any event and share it via a unique URL.
All calculators handle edge cases automatically — leap years, varying month lengths, daylight saving time, and multi-year ranges. Results update as you type, and every result page has a shareable URL so you can bookmark or send the exact calculation.
If you want a live countdown timer to a specific date or event rather than a calculation, try these popular timers: