Date Difference Calculator: The Complete Guide
Measure the span between two dates. Enter a start and end date to see the difference in total days, in years/months/days, in weeks, and in business days.
Who the Date Difference Calculator is for
Anyone calculating durations between dates — projects, deadlines, anniversaries, or contracts.
How to use the Date Difference Calculator
- Type your values into the fields above — pick your currency or units where the calculator offers them.
- Results update automatically as you type; there's no submit button and nothing is sent to a server.
- Adjust any input to compare scenarios, then copy the result with a single click.
How it works
The total days is the calendar count between the two dates. The same span is also expressed as whole years, months, and days, as weeks, and as business days (Monday–Friday).
Features
- Total days between dates
- Years, months & days
- Weeks & business days
- Any two dates
Different ways to measure a span
The gap between two dates can be expressed many ways — raw days for precise counting, years and months for a human-friendly summary, weeks for planning, or business days for work scheduling. This calculator shows all of them at once so you can pick what fits your purpose.