Hammer Calculator

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Crew Size Calculator

Determine the optimal crew size for your project based on man-hours, deadlines, or total labor cost — with built-in diminishing-returns modeling for large crews.

Crew Size Calculator
Recommended Crew Size
6 workers
98% effective productivity
Total Days
11 days
46.8 effective man-hrs/day
Total Labor Hours
528 hrs
6 workers x 11 days x 8 hrs
6 workers for 11 days480 man-hours spread across 6 workers at 8 hours/day will take approximately 11 working days. Note: with 6 workers, effective productivity is 98% due to coordination overhead.
Diminishing returns with large crewsCrews larger than 4 workers experience roughly 5% less productivity per additional person due to communication overhead, workspace congestion, and coordination delays. Your crew of 6 operates at 98% effective productivity.
This is an estimate based on typical productivity rates. Actual crew performance varies by skill level, site conditions, weather, and task complexity. Diminishing returns model is approximate — real-world overhead depends on job layout and management.