Voltti
Free tool

Work hours calculator
for your week.

Enter when you started, finished and took breaks. Get your daily and weekly hours, decimal hours, overtime and pay. Works as a time card or timesheet calculator, with no signup.

DayStartEndBreak (min)Hours
Total hours0h 00m0.00 hours
Regular0h 00m0.00 hours
Overtime0h 00m0.00 hours
Gross pay-Add an hourly rate
Stop guessing

Your computer already knows your hours.

Typing start and end times works for a timesheet. If you work on a computer, Voltti counts every real minute for you, in every app and work website, and stops counting when you step away. No timer to start or stop.

Download for Mac Download for Windows

Free · macOS 13 or later · Windows 10 and 11

How it works

How to calculate hours worked.

  1. Find the length of each shift. Subtract the start time from the end time. 9:00 AM to 5:30 PM is 8 hours 30 minutes.
  2. Take out unpaid breaks. A 30 minute lunch leaves 8 hours.
  3. Add up the days. Five 8 hour days make a 40 hour week.
  4. Convert to decimal for payroll. Divide the minutes by 60. 7 hours 45 minutes is 7.75 hours.
  5. Split out overtime. Under the US Fair Labor Standards Act, hours over 40 in a work week are usually paid at 1.5 times the regular rate. Rules differ by country and state, so check yours.

A shift that ends after midnight, like 10:00 PM to 6:00 AM, counts as 8 hours. The calculator above handles that for you.

Reference

Minutes to decimal hours.

Payroll and invoices usually want hours as a decimal. Divide minutes by 60, or use this chart.

MinutesDecimal hours
50.08
100.17
150.25
200.33
250.42
300.50
350.58
400.67
450.75
500.83
550.92
601.00
FAQ

Work hours, answered.

How do I calculate my hours worked in a week?

For each day, subtract your start time from your end time and take out unpaid breaks. Then add the days together. Enter your times above and the calculator does both steps for you.

How do I convert hours and minutes to decimal?

Divide the minutes by 60 and add them to the hours. 8 hours 20 minutes is 8 + 20 ÷ 60 = 8.33 hours. The chart above lists the common values.

How is overtime calculated?

In the US, non-exempt employees usually earn 1.5 times their regular rate for hours over 40 in a work week. Some states, like California, also count daily overtime. Set your own weekly limit and multiplier above if yours differ.

Can I use it as a time card or timesheet calculator?

Yes. Copy each day's clock-in and clock-out times from your time card or timesheet, add any unpaid breaks, and you get the weekly total in hours and minutes and as decimal hours ready for payroll. Copy summary puts the whole week on your clipboard.

Does it work for night shifts?

Yes. If the end time is earlier than the start time, the calculator treats the shift as running past midnight.

Is my data saved anywhere?

Your times stay in your browser so they're still there when you come back. Nothing is sent to a server.

Is there a way to track my hours automatically?

If you work on a computer, yes. Voltti for Mac and Voltti for Windows record every real minute in your apps and work websites, with no timer to start or stop. The free plan includes automatic tracking.