About the Hours Calculator
Tezmy's Hours Calculator is a simple weekly time card. Enter when you started and finished each day and how long your breaks were, and it totals the hours worked per day and for the whole week, in hours and minutes and in decimal hours (the format most payroll systems use). Add your hourly rate to see your pay for the week. Night shifts that run past midnight are handled automatically.
Updated October 2026
How to use the Hours Calculator
- 1Enter a start and end time for each day you worked.
- 2Add your unpaid break in minutes.
- 3Read the hours for each day and the weekly total.
- 4Enter your hourly rate to see your pay.
How hours worked are calculated
For each day, the calculator takes your finish time minus your start time, then subtracts your break. Working 8:30 to 17:00 with a 30-minute lunch gives 8 hours. The daily totals are added up for the week, so you can check your payslip or fill in a timesheet.
Decimal hours explained
Payroll systems often use decimal hours instead of hours and minutes. 7 hours 30 minutes is 7.5 decimal hours, and 7 hours 45 minutes is 7.75. To convert minutes, divide by 60: 15 minutes = 0.25, 20 minutes = 0.33, 40 minutes = 0.67. The calculator shows both formats.
Night shifts
If your shift ends after midnight, just enter the times as they are, like 22:00 to 06:00. The calculator knows the shift runs into the next day and counts 8 hours, not a negative number.
Pay and overtime
Add your hourly rate to see the pay for the week before tax. Overtime rules differ between countries and employers, so the calculator uses one rate for all hours. To see your pay per month or year, or to compare job offers, try the Salary Calculator.
Check your payslip
Mistakes in hours are more common than people think, especially with night shifts and unpaid breaks. Fill in the week as you work, then compare the total with your payslip. If the numbers differ, you'll have the daily times ready to show your employer. To count days instead use Days Between Dates, and for other cities use the Time Zone Converter.
Features
- Monday to Sunday time card
- Breaks deducted automatically
- Overnight shifts supported
- Hours:minutes and decimal hours
- Weekly pay from your hourly rate
- Works great on phones
Frequently asked questions
How do I calculate hours worked?
Subtract the start time from the end time, then subtract unpaid breaks. 9:00 to 17:30 with a 30-minute break is 8 hours.
What are decimal hours?
Hours written as a decimal number, as payroll usually needs. 8 hours 15 minutes is 8.25 hours, and 8 hours 45 minutes is 8.75 hours.
How do I enter a night shift?
Just type the real times, like 22:00 to 06:00. When the end is earlier than the start, the calculator knows the shift crossed midnight.
Does it include overtime?
It shows your total hours. If you get paid more after, say, 40 hours, work out the extra hours from the total and multiply them by your overtime rate.
Is my data saved?
No. Everything stays in your browser and is cleared when you leave.
How do I calculate 7.5 hours in hours and minutes?
The .5 is half an hour, so 7.5 hours is 7 hours 30 minutes. Multiply the decimal part by 60 to get minutes.
Can I use it on my phone every day?
Yes. It's built for phones: fill in each day as you go, and your entries stay on your device.
Does it handle 12-hour and 24-hour time?
Yes. Use the time picker on your device, which shows AM/PM or 24-hour time depending on your settings.
Can I enter breaks in minutes?
Yes. Enter each day's break in minutes, like 30 or 45, and it is taken off that day's total automatically.