How it works
Nights equal the check-out date minus the check-in date. The day count includes both the check-in and check-out dates, so it equals the number of nights plus one.
Stay Duration Calculator
Nights and days between a check-in and check-out date.
Interactive calculator
This calculator becomes interactive when JavaScript is available. The page still provides its method, limits and related tools without JavaScript.
Result classification
Mathematically exact. The result uses deterministic calendar or arithmetic rules on the values you enter. Dates are normalized before calculation, and invalid inputs are rejected.
Limitations
Exact for the stated rule and valid inputs; it does not decide legal, medical, contractual or policy questions.
Frequently asked questions
Why is "days" one more than "nights"?
A three-night stay spans four calendar days when both the arrival and departure dates are counted.
Practical guide
Reviewed 27 July 2026How to use the Stay Duration Calculator
- Enter the known values.Use the date, time, place or duration requested above.
- Check the assumptions.Confirm time zone, weekend, inclusion and rounding choices when shown.
- Read and reuse the result.Copy, share or continue to a related tool without retyping unnecessary information.
Common uses
The Stay Duration Calculator is useful for trip planning, accommodation, international flights and allowance tracking.
Edge cases to check
Pay particular attention to inclusive entry days, border authority rules, overnight travel and DST.