About Date Difference
Date Difference tells you how much time sits between any two dates — broken down into years, months and days, plus the totals in weeks, days, hours, and minutes. There's a workday counter that excludes weekends, and an add/subtract mode that takes a starting date plus a duration and tells you the resulting date. Useful for project deadlines, contract dates, pregnancy tracking, anniversary planning, and historical research.
- No uploads
- Browser-only
- Works offline
- 100% free
How it works
- 1
Pick two dates
Type or pick a start and end date. Times before 1900 and decades into the future both work.
- 2
Read the breakdown
Calendar diff (Y/M/D), plus totals in weeks, days, hours, minutes — and a workday count if you need to exclude weekends.
- 3
Switch to add/subtract
Toggle the second mode: enter a start date and a +/– duration (e.g. 90 days, 6 months) to get the resulting date.
Related tools
Browse allYears, months, days lived — plus days until your next birthday.
Current time across cities — see offsets vs your local timezone.
Unix ↔ ISO ↔ human dates, with timezone viewer.
Scientific calculator with parentheses, sin/cos/log and a history.
Frequently asked questions
Are my files uploaded to a server?
No. Every tool on SnapToolz runs entirely inside your browser using JavaScript and WebAssembly. Your file is read locally, processed in memory, and the result is offered as a download. Nothing is sent to a server — there isn't one to send to.
Are weekends and holidays excluded from the workday count?
Weekends (Saturday and Sunday) are always excluded from the workday total. National holidays are not — they vary by country and region. For US/UK/IN-specific workday counts with holidays excluded you'll need to subtract the holidays manually from the result.
Does it handle daylight saving time?
The Y/M/D breakdown isn't affected by DST since it counts calendar days. The hour and minute totals are computed in your local timezone and will reflect the one missing or extra hour at DST transitions — usually a non-issue for date ranges spanning multiple days.
Can I compute things like '90 days from today'?
Yes — that's exactly what the add/subtract mode is for. Enter today's date, type '+ 90 days', and the resulting date appears. Useful for contract deadlines, return windows, and waiting-period calculations.
Does it work offline?
Yes. SnapToolz is a Progressive Web App. After your first visit, the app is cached on your device and every tool keeps working without an internet connection.
Is SnapToolz free?
Yes — every tool is 100% free with no sign-up, no watermark, no hidden tier. The whole platform is open source and we have no plan to gate features.