Date calculators · Workdays & planning
Work Hours Calculator
Turn a shift into a clear hours total. Include overnight work, subtract your break, and choose how clock changes count.
Your calculation
Ready when you are
Choose your dates.
Select your counting rules and calculate.
Calculation details
| Step | Value |
|---|
How to use this calculator
Enter start and end dates and times, then the unpaid break in minutes. Choose wall-clock arithmetic or actual elapsed hours in a time zone. For a repeated time during a clock change, choose its earlier or later occurrence.
The result includes hours and minutes, decimal hours and the gross interval. Elapsed mode uses your browser's time-zone database and rejects nonexistent local times. Wall-clock mode measures the displayed calendar interval without DST adjustment. Spans are limited to 366 days; no wage, rounding or overtime policy is applied.
A worked example
November 2, 2026 from 09:00 to 17:30 with a 30-minute unpaid break gives 8 hours. In New York, November 1 from 00:00 to 04:00 spans five actual hours across the fall clock change, or four wall-clock hours.
Can I calculate more than one shift?
Use the Time Card Calculator for multiple dated intervals, split shifts, weekly totals and an optional weekly overtime threshold.
Further reading: Clockify's time-card workflow. Your entered rules determine this result.
Which calendar and years are supported?
Use Gregorian dates from 1900 through 2100. Each tool shows its own range and counting rules. Calculations run in your browser when requested, with no background polling. Today buttons use the server's current date in your browser's time zone. Calendar downloads contain all-day planning markers; review them before importing.
What happens to my dates?
Calculations run on your device. Saving a calculation is optional and keeps it in this browser. A setup link contains the dates and settings you entered; anyone with the link can read them. Use one tab per saved calculator. Clear saved data from Privacy & settings.