Time Card / Hours Calculator
Add up hours worked across multiple shifts from clock-in and clock-out times, subtract unpaid breaks, and estimate pay with optional overtime.
Last updated August 20, 2026
How to use the time card calculator
- 1
Enter a clock-in and clock-out time for each shift, plus any unpaid break minutes — add more rows for a full week or pay period.
- 2
Optionally set an overtime threshold and multiplier, or turn overtime off entirely.
- 3
Optionally add your hourly rate to estimate pay alongside total hours.
- 4
Your total hours, a per-shift breakdown, and estimated pay update instantly as you adjust any field.
How hours and breaks are calculated
Each shift is its own small calculation: the full clock-in to clock-out span, minus whatever unpaid break time falls inside it. Every shift's worked time is then added together for the period total — the calculator also detects when a clock-out time is earlier in the day than clock-in and treats it as an overnight shift automatically.
Worked example: three 9:00 AM–5:00 PM shifts with a 30-minute unpaid break each. Each shift is 8 hours minus 30 minutes = 7h 30m. Three of those total 22h 30m for the period — at $20/hour with overtime enabled at a 40-hour threshold, all of it falls under the threshold, for an estimated $450.00 in pay.
Overtime rules vary by state
The default 40-hour weekly threshold and 1.5× multiplier match the standard U.S. federal overtime rule (FLSA), but overtime law is more layered in practice. Some states require overtime after 8 hours in a single day regardless of the weekly total, some have different thresholds for specific industries, and some employers apply their own more generous policies on top of the legal minimum. This calculator models a simple weekly threshold only — adjust the threshold and multiplier fields to match your actual situation, or turn overtime off if it doesn't apply to you.
Once you know your hours and estimated pay, our Paycheck Calculator estimates what actually lands in your bank account after federal tax, state tax, and FICA.
Need days or weeks between two dates instead of hours in a shift? Try the Date Calculator →
Working with a remote team across regions? Our Time Zone Converter → converts shift start/end times across cities and finds shared meeting windows.