Date Difference Calculator

What does the Date Difference Calculator do?

Use this to measure durations such as how long you have worked somewhere, a project timeline or the time until an event. The main result counts calendar years, months and days; the extra statistics show total days, weeks plus days, total months (decimal) and hours.

Tick “Include the end date” when both the first and last days should count, as with leave periods or hotel stays counted inclusively. If the end date is before the start date, the absolute difference is shown.

Examples

Work experience

2019-03-01 to 2026-11-15 = 7 years, 8 months, 14 days.

Inclusive leave

1 to 10 December with “include end date” = 10 days.

Common use cases

• Employment duration for CVs and experience letters
• Project and contract periods
• Counting days until events
• Rental and subscription periods

Features and benefits

• Private by design — your data is processed on your device and never uploaded.
• Free with no account, no watermark and no usage limits.
• Works on phones, tablets and desktops in any modern browser.

Limitations to know

• Months have different lengths, so “total months” is an approximation using 30.44 days per month for the remainder.