Construction labour hours calculator
Add up total man-hours by job, crew or day with regular and overtime hours separated. Works in the browser, nothing to install.
Man-hours are the unit a construction schedule is really built from. Enter each crew as a row: how many workers, how many regular hours each, and how many overtime hours each. The calculator totals regular man-hours, overtime man-hours and the combined figure.
| Crew / job | Workers | Reg hrs each | OT hrs each | Regular man-hours | OT man-hours | Total man-hours | |
|---|---|---|---|---|---|---|---|
| 32.00 | 0.00 | 32.00 | |||||
| 16.00 | 4.00 | 20.00 | |||||
| 4.00 | 0.00 | 4.00 | |||||
| Totals | 52.00 | 4.00 | 56.00 |
This calculator multiplies workers by hours. It does not calculate wages, labour burden, union rates, payroll taxes or legal overtime entitlements — those depend on rates and rules this tool does not ask for.
How the totals work
Regular man-hours are workers multiplied by regular hours. Overtime man-hours are workers multiplied by overtime hours. The total is the sum of both across every row, which is the number a schedule or a productivity comparison needs.
Worked example
A framing crew of four at eight regular hours is 32 man-hours. Two of the same crew at two overtime hours adds 4 overtime man-hours, and a supervisor at four hours adds 4 more, for 40 man-hours on the day.
Questions
- Should overtime hours be in the same total?
- Keep them separate. Regular and overtime man-hours carry different costs and different entitlement rules, so the calculator shows both and the combined total.
- Does it calculate labour cost?
- No. Turning man-hours into cost needs each worker's rate plus burden and premium rules. This tool deliberately stops at hours so it cannot misstate pay.
- Does it save my entries?
- Nothing is stored. Use Copy results to move the table into a spreadsheet, and refresh to start again.
Man-hours are only as good as the hours behind them
FastBuild records the attendance that produces these hours, per job site, so the man-hours you plan against are the hours that were actually worked — not the hours somebody remembered on Friday.