About the Time Until Calculator
How long until a future date, in days, weeks and working days.
Also known as: days until date, how long until, time remaining calculator, countdown to date.
How to use this calculator
- Enter future date, today.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
remaining = future date − today
Worked example
Using the values pre-filled in the calculator above:
- Future date: 2026-12-31
- Today: 2026-09-22
the calculator returns:
- Time until: 0 years, 3 months, 9 days
- Days to go: 100
- Weeks to go: 14.29
- Working days: 73