Acres/hr = Speed (mph) × Width (ft) × Efficiency / 8250
The acres-per-hour formula converts travel speed, implement width, and efficiency into coverage rate. The constant 8,250 converts mph × ft into acres/hr (1 acre = 43,560 sq ft, 1 mile = 5,280 ft). Field efficiency accounts for turning time, overlap, and downtime — typically 70-85% for tillage, 60-75% for planters, and 65-80% for sprayers. To maximize coverage: increase speed where safe, reduce overlap with GPS guidance, and minimize headland turns. This calculation helps farmers estimate job completion time, fuel needs, and equipment sizing.