Calculators
Date Difference Calculator
Compare two date-times and see the difference in seconds, minutes, hours, days, weeks, months, and years.
Date-time inputs are calculated locally in your browser. Nothing is uploaded.
Date difference
Compare a start and end date-time and see the difference in every common unit.
How the difference is calculated
Both inputs are treated as wall-clock date-times. The tool calculates exact elapsed seconds, then derives minutes, hours, days, and weeks. The calendar breakdown counts full years and months, clamps to the last valid day, then adds the remaining days and time.
No timezone conversion is applied. If the end is earlier than the start, the absolute difference is shown with a warning.