Date Difference
Count the days, weeks and months between any two dates.
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Step by step
The formula
difference = end date − start date
Counting days between dates means counting the nights in between, so a Monday-to-Friday span is 4 days, not 5. Add one if you need to include both end days. Month and year figures are approximations, since months vary from 28 to 31 days.
All calculations run locally in your browser and update instantly as you type.
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Common questions this calculator answers — select one to load its values.
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Frequently asked questions
Are both dates included?+
We count the number of nights between the dates. Add one if you want to include both the start and end day.
All calculations run locally in your browser. Nothing you type is sent to a server.