Time Calculator
Calculate how long until a future date or how long since a past date and time, or the duration between any two dates. Works fully offline in your browser.
About this tool
Answer time questions instantly: how long until 20 July 2026, how long since 17 August 1945, or how many hours until 22:00 tonight. Pick any target date and time and the tool shows the exact breakdown in years, months, days, hours and minutes, plus totals in days, weeks, hours and minutes. A second mode measures the duration between any two dates. Quick presets cover New Year, 17 August, Christmas and end of year. Everything is computed locally in your browser, so it works offline and nothing is sent anywhere.
Details
- Category
- Utilities
- Version
- 1.0.0
- Size
- 11 KB
- Updated
- Jun 2026
Frequently Asked Questions
How do I calculate how long until a specific time today?
Pick a target with today's date and the time you want (e.g. 22:00). The tool shows the hours and minutes remaining. If the time has already passed today, choose tomorrow's date to count to the next occurrence.
Is the year/month breakdown accurate?
Yes. The calculation is calendar-aware: it accounts for different month lengths and leap years by borrowing days from the correct month, so "1 month" reflects the actual month involved rather than a fixed 30 days.
Can I measure the duration between two dates?
Yes. Switch to the "Between 2 Dates" mode and set both a From and To date (and optional time). The result shows the exact duration between them.
Is my data sent anywhere?
No. All calculations happen locally in your browser using plain date math. Nothing is uploaded, so the tool works fully offline.