Methodology guide
GPM math, fuel compatibility, and safety notes.
Calculator
Fuel transfer pump GPM calculator
Enter tank gallons, target fill minutes, and fuel type. Get the smallest 10, 15, or 20 GPM class or NO_MATCH. Gasoline skips diesel-only 10 GPM.
Result
Required GPM ≈ tank_gal ÷ fill_minutes. Classes: diesel 10 · 15 · 20; gasoline 15 · 20. Worked check: 55 gal / 6 min diesel → ≈9.2 GPM → 10 GPM class.
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