Date Calculator
Find the date N days from now, or the duration between two dates in days, weeks, months and years.
How to use the Date Calculator
-
Pick a start date.
-
Choose Add, Subtract, or Duration mode.
-
See the result and copy the date or duration.
How to calculate dates
Date math is tricky — months have different lengths, leap years adjust February, and time zones can shift a date by a day. This calculator handles all of that, letting you add or subtract days, weeks, months or years from any date, or measure the exact duration between two dates in multiple units. It's great for sprint planning, contract deadlines, warranty expiry, or figuring out how many days until an event.
Key features
- Add or subtract days, weeks, months, and years
- Calculate exact duration between any two dates
- Shows result in days, weeks, months, and years
- Handles leap years and month-length differences
Frequently asked questions
Does it handle leap years?
Yes. Date calculations account for leap years and varying month lengths automatically.
Can I count business days?
Use the Deadline Calculator for business/working day calculations. This tool counts calendar days.
Are my dates stored or uploaded?
No. All calculation happens locally in your browser.