What is a date difference calculator?
A date difference calculator counts the amount of time between two selected dates.
Date & Time
Date Difference Calculator
Calculate the difference between two dates directly in your browser. Count calendar days, weeks, months, years, and remaining days between start and end dates.
Tool
Date Difference Calculator
Calculate the difference between two dates directly in your browser. Count calendar days, weeks, months, years, and remaining days between start and end dates.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free date difference calculator to count the time between two dates. Enter a start date and an end date to see the difference in calendar days, weeks, months, and years.
Conversion Formula
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Date difference is calculated by comparing the start date and end date. The total day count uses calendar days, while years and months are derived from full calendar periods between both dates.
Examples
- 2026-01-01 to 2026-01-31 = 30 days difference
- 2026-06-01 to 2026-07-01 = 1 calendar month
- Count how many days are between a project start date and deadline
Frequently Asked Questions
Does it count calendar days or business days?
This tool counts calendar days. For weekends and working days, use the business days calculator.
Can I calculate dates in the past?
Yes. You can compare past dates, future dates, or one past date and one future date.
Is the end date included?
The tool can support inclusive or exclusive counting depending on the selected option.
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