Working totals use integer minutes to avoid decimal drift.
Work time, without the busywork
Free work-time calculators that get straight to the answer
Calculate time cards, breaks, decimal hours and clock-out times in seconds. Your entries stay in your browser, and no account is required.
- No signup
- Private by design
- Mobile friendly
Weekly time card
Calculated
Mon9:00 AM–5:00 PM7h 30m
Tue8:45 AM–5:15 PM8h
Wed9:00 AM–5:30 PM8h
Example total
23h 30m
23.50 decimal hours
Four focused tools
Choose what you need to calculate
Each calculator explains its method and shows hours in both clock and decimal formats where useful.
Time Card CalculatorWeekly or biweekly hours, breaks, overtime and estimated pay.
Decimal Hours CalculatorConvert hours and minutes to decimal hours, and back again.
Clock-out Time CalculatorFind your leave time from a start time, work target and break.
Lunch Break CalculatorMeasure a lunch or break duration, including overnight periods.
Built for real shifts
Clear answers, including the awkward cases
ClockSlate handles unpaid breaks, overnight work and multiple shifts without hiding the calculation behind a signup wall.
Every page explains how the result is produced.
Print, copy and export time-card results when you need a record.
Optional settings remain on your device instead of creating an account.
Frequently asked questions
About these calculators
Does ClockSlate send my time entries to a server?
No. The live calculations run in your browser. If you choose to save preferences, they are stored locally on your device.
Can I use the totals for payroll?
ClockSlate can help you check and prepare figures, but results are estimates. Always compare them with your employer's rules, payroll records and applicable law.
Are the calculators free?
Yes. The launch calculators are free and do not require an account.