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Calculate the difference between two dates in days, weeks, months and years. Results display immediately with useful equivalents (hours, minutes). Ideal for project planning, contract durations or countdowns.
Free, no account required, browser processing and no server upload.
Pick two dates and get the duration in days, weeks, months and years.
Days
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Weeks
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Months
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Years
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Calculate the difference between two dates in days, weeks, months and years. Results display immediately with useful equivalents (hours, minutes). Ideal for project planning, contract durations or countdowns.
Concrete examples
1 month
~30.4
4.3
1 quarter
~91
13
1 year
365 (366 if leap year)
52.1
Months are calculated in average days (30.44). If you need day-level precision (e.g., contracts), manually check months spanning February or 31-day months.
A project starts on January 2, 2026 and ends on June 15, 2026. The tool calculates: 164 days, or 23 weeks and 3 days, or 5 months and 13 days. Enough to plan milestones without error.
Calculate date duration helps you complete this task directly in your browser. You keep control of your data and get the result locally.
Yes. Calculate date duration is free to use and runs in your browser without sending files or content to Lmaotools servers for processing or storage.
No. Files and content added to the tools are processed in your browser. They are not sent to Lmaotools servers for conversion or storage.
No. Open the tool, add your file or content, then get the result. Processing happens locally in your browser.