Date & Time
Days Between Dates
Find the exact number of calendar days between two dates.
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How this calculation works
Find the exact number of calendar days between two dates. Choose a start date and end date to count elapsed calendar days; the end date must not be earlier than the start.
Formula used
D = |d₂ − d₁|
Good to know
Results are estimates for informational purposes.
Example calculation
|2026-01-31 − 2026-01-01| = 30
How to use this calculator
- Choose a start date and end date to count elapsed calendar days; the end date must not be earlier than the start.
- Check units and time periods before comparing two results.
- Change one input at a time to understand its effect.
Frequently asked questions
What does the Days Between Dates calculate?
Find the exact number of calendar days between two dates. The result is calculated from the values you enter and the formula shown on this page.
Which assumptions does the Days Between Dates use?
It applies D = |d₂ − d₁|. Values, fees, rules or timing not represented by an input are not added automatically.