Time Difference Calculator
Time Between Two Dates
Use this calculator to calculate the exact duration days, hours, minutes, and seconds between two different dates and times.
Measure the Time Between Two Dates
This calculator finds the exact amount of time between any two dates and times, useful for counting down to a deadline, checking how long a project took, working out an age or anniversary span, or planning travel across several days.
Everything runs in your browser. Nothing you enter is stored or uploaded.
Frequently Asked Questions
How do I calculate the time between two dates?
Pick a start date and time and an end date and time. The calculator shows the difference broken down into months, days, hours, and minutes.
Does the order of the dates matter?
No. The calculator always shows the absolute difference, so swapping the start and end dates gives the same result.
How are months counted?
Months are based on the average month length of about 30.44 days, which keeps long ranges accurate across months of different lengths.
Is this date difference calculator free?
Yes. It is completely free, requires no account, and runs entirely in your browser.
More Free Time Tools
- Time Card Calculator - add up weekly work hours with breaks and download a PDF timesheet.
- Time to Decimal Calculator - convert hours and minutes into decimal hours for payroll.
- Time Duration Calculator - find the exact time between a start and end time.