Calculate date differences, durations, age, business days, countdowns, and timezone conversions instantly. 100% free, no login required.
Our date difference calculator finds the exact number of days, weeks, months, and years between any two dates. Includes a separate count of business days and weekends. Exclude public holidays for the US, UK, Canada, or Australia.
Common uses: calculating employee tenure, contract durations, lease expiry, project timelines, or simply finding how many days until an upcoming event.
Add or subtract hours, minutes, and seconds with ease. Ideal for shift workers, athletes tracking training, video editors summing clip lengths, and project managers tallying timesheet entries.
Computes your precise age in years, months, and days from any date of birth. Also shows total days lived and days until your next birthday. Handles leap year birthdays correctly.
Counts Monday–Friday working days between two dates, excluding weekends and public holidays for the US, UK, Canada, or Australia. Essential for payroll processing, notice periods, shipping windows, and net-30 payment terms.
Live countdown to any future date and time — updates every second. Popular for exam dates, product launches, holidays, weddings, and travel departures.
Instantly shows any date and time in major global cities. Essential for remote teams scheduling international calls, travelers planning flights, and developers working with UTC timestamps.
Enter a start date and number of working days to find your exact project end date. Auto-generates milestone markers at 25%, 50%, and 75% completion. Used by freelancers, development teams, and HR professionals.
Exam countdowns and assignment deadlines.
Shift timing and payroll duration.
Employee tenure and notice periods.
Client deadlines and project tracking.
Timezone planning and flight schedules.
Epoch conversion and timestamp math.
Simply enter the start and end dates in our Date Diff tool to get total days, weeks, and business days.
Yes, our Business Days calculator allows you to exclude US, UK, Canada, or Australia public holidays and weekends.
100% free. We are supported by minimal ads to keep the tools running for everyone.
Yes, click the moon icon in the top right to toggle between light and dark modes.
We use standard Gregorian calendar logic and precise timezone data for all results.
You can copy individual results or use the browser print function for a clean report.
"The best date tool I've used. Clean, fast and incredibly accurate."
"Essential for my payroll calculations every month. Saves me so much time."
"Love the timezone converter for scheduling my global team meetings."