How to Calculate Excavator Productivity
Excavator output per hour is calculated by multiplying bucket capacity, fill factor, cycles per hour, and job efficiency. Formula: Output (m³/h) = Bucket Volume × Fill Factor × (3600 ÷ Cycle Time) × Efficiency. Divide total earthwork volume by hourly output to get total hours needed.
Cycle time covers the full dig-swing-dump-return sequence, typically 20–35 seconds. Fill factor varies by material: sandy soil ~1.0, clay ~0.85, rock ~0.65. Job efficiency of 80% is a conservative standard accounting for repositioning and brief stops.
This calculator assumes a single machine. Multiply the machine count to scale up output proportionally.
Frequently Asked Questions
0.4 m³ suits tight urban sites; 0.7 m³ is standard for general earthwork; 1.0 m³+ is for large-scale civil projects. Larger buckets increase output but reduce maneuverability.
Results are estimates based on theoretical formulas. Actual output varies with ground conditions, haul distance, weather, and operator skill. Add a 10–20% buffer when planning schedules.