Days between dates
Work out exactly how many days are between two dates — useful for deadlines, ages, anniversaries or any date-difference question.
Result
Days between
How to use this calculator
- Enter the start date.
- Enter the end date.
- Read the number of days between them.
Assumptions
- Counts calendar days between the two dates — if the end date is before the start date, the result is negative.
Technical details: what the fields mean
- Start date
startDate - The earlier date.
- End date
endDate - The later date.
Methodology
Days = (end date − start date), converted from milliseconds to whole days.
Worked example
1 Jan 2026 to 11 Jan 2026
Inputs: startDate=2026-01-01, endDate=2026-01-11
Result: 10 days
Practical guidance
- For working-day counts (excluding weekends), use the business days calculator instead.
Common mistakes
- Expecting this to exclude weekends — it counts every calendar day. Use the business-days calculator for weekday-only counts.
FAQs
How many days between two dates?
Enter both dates above — this subtracts the earlier from the later and shows the exact day count.