Crew-launch calculator

Total hours, deadline. Crews to staff.

Working backward from a deadline and forward from headcount. Productive-hours-per-crew (after efficiency loss) drives the math, and we round up because half-crews don't finish jobs.

Inputs

Plug in your numbers.

Total project hours

Sum from the takeoff or a pull from your labor-hours calculator

Target duration (weeks)

The deadline you're working back from

Hours per crew per week

Standard is 40; bump for OT, drop for short shifts

Efficiency (%)

Time on the actual scope vs. setup, breaks, weather, RFIs

Results

What you need to staff.

Productive hr / crew / week

34.0hr

Total crew-weeks

70.6cw

Crews needed (rounded up)

Actual finish week (with rounding)

7.8wk

40 × 85% = 34.0 productive hr/crew/wk
2400 hr ÷ 34.0 hr/crew/wk = 70.6 crew-weeks
70.6 cw ÷ 8 wk = 8.82 → ⌈⌉ = 9 crews

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