Time
Date Calculator
Calculate date differences, add/subtract time, convert timestamps.
How it works
Date calculations are surprisingly complex. Months have different lengths, leap years add extra days, and time zones complicate everything. This calculator provides four essential date tools in one interface, handling the complexity so you do not have to.
The Date Difference tool calculates the exact time between two dates in multiple units: days, weeks, months, and years, plus a combined human-readable format like "2 years, 3 months, 5 days." Use this for project planning, contract terms, or age calculations.
The Add/Subtract tool lets you find a date relative to another date. Add 90 days to a start date, subtract 2 weeks from a deadline, or calculate what date is 6 months from now. The Unix Timestamp converter bridges the gap between human-readable dates and the epoch time used in programming and databases. The Age Calculator shows exact age down to the day and counts down to the next birthday.
All calculations account for calendar quirks like varying month lengths and leap years, so you get accurate results without manual adjustment.