Date Calculator
Three questions, one tool: add days or weeks to a date, count the days between two dates, or add hours to the current time.
Example — 12 weeks from todayTuesday, January 5, 2027
Counted from today, Tuesday, October 13, 2026: 12 weeks = 84 days, and 84 days forward lands on Tuesday, January 5, 2027. This example is re-counted every time the page is built; the tool below always uses your real today.
Counted from today, Tuesday, October 13, 2026: 12 weeks = 84 days, and 84 days forward lands on Tuesday, January 5, 2027. This example is re-counted every time the page is built; the tool below always uses your real today.
How we count
- Weeks become days first: 1 week = 7 days, exactly.
- Days between dates are counted as midnights crossed — the standard way calendars and age calculators count — so the start date itself is not counted, and the end date is.
- Every answer is checked by counting backwards: add the result, then subtract it, and you must land on the start.
Questions people also ask
Does "12 weeks from today" count today?
No. Today is day zero. Twelve weeks from today is exactly 84 days later, the same weekday as today.
Why does the example date change?
Because "today" changes. The example on this page is re-counted when the page is built, and the tool counts from the day you actually use it.