Countdown Calculator: Days Until a Date
Pick a start date and a target date to see how many days, weeks and hours remain. The start date begins as today.
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Formula
days = target date - start date (calendar days, midnight to midnight)
weeks = floor(days ÷ 7), extra days = days mod 7, hours = days × 24
Worked example
From 1 January 2026 to 1 March 2026: January has 31 days and February 2026 has 28, so the total is 31 + 28 = 59 days. That is 8 whole weeks (56 days) plus 3 days, and 59 × 24 = 1,416 hours.
Frequently asked questions
How are the days until a date counted?
It counts the calendar days between the two dates, not including the start day. From 1 January 2026 to 1 March 2026 that is 31 + 28 = 59 days.
How many weeks is that?
Divide the days by 7. 59 days is 8 whole weeks and 3 extra days, because 8 × 7 = 56.
How are hours worked out?
Hours are the days multiplied by 24, counted from midnight to midnight. 59 days is 59 × 24 = 1,416 hours. Daylight saving changes are ignored.
Why do I get a date error?
The target date must be a real date and must not be before the start date. To count back from a past date, swap the two dates.