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Calculate the exact difference between two dates in years, months, and days. Also shows total days, weeks, hours, and minutes — results are instant.
Select two dates and click Calculate Difference
This date difference calculator compares two calendar dates and returns both a readable calendar span and fixed-unit totals. It puts dates in chronological order automatically, so entering the later date first produces the same absolute difference.
Years and months are calendar units. Their lengths vary because months contain different numbers of days and leap years add February 29. Total days is the whole calendar-day span; weeks, hours, and minutes are derived from that total.
| Output | Meaning |
|---|---|
| Years, months, days | Calendar breakdown |
| Total days | Whole days between dates |
| Total weeks | Complete seven-day groups |
| Total hours | Total days × 24 |
| Total minutes | Total days × 1,440 |
Only the date portion is used. Time of day, time zones, and daylight-saving clock changes do not affect the result.
Use date difference for any two dates and a general duration. Use an age calculator when the starting date is a birth date and you need age-specific details such as the next birthday.
| Tool | Best for | Typical result |
|---|---|---|
| Date difference | Any two calendar dates | Calendar span and total units |
| Age calculator | Birth date to target date | Age and next birthday |
| Countdown timer | A live future event | Remaining time that updates |
const start = new Date(2024, 0, 15);
const end = new Date(2024, 1, 20);
const totalDays = Math.floor(
(Date.UTC(end.getFullYear(), end.getMonth(), end.getDate()) -
Date.UTC(start.getFullYear(), start.getMonth(), start.getDate())) /
86400000,
);
from datetime import date
start = date(2024, 1, 15)
end = date(2024, 2, 20)
total_days = (end - start).days
SELECT DATE '2024-02-20' - DATE '2024-01-15' AS total_days;
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