# Timecard Hours Calculator Example

Calculate paid work time in Calcul.io by subtracting start and finish times, removing an unpaid break, and keeping the shift result easy to edit.

## Timecard hours

Subtract a start time from a finish time, then remove an unpaid break. This sample covers a 09:15 to 17:45 shift with a 45-minute break.

```calculio
startTime = 09:15
finishTime = 17:45
breakTime = 45 min
shiftLength = finishTime - startTime
paidTime = shiftLength - breakTime
```

## How it works

1. Edit the start and finish times in 24-hour notation.
2. Set `breakTime` to the unpaid duration.
3. Use `paidTime` for the hours that remain after the break.

Add another calculator group for an overnight shift, or keep one shift per group when you are checking a weekly timesheet.

[Next: turn distance and time into a pace](https://calcul.io/examples/running-pace/index.md)