Aviation Fluid and Fuel Weight Converter: lbs, kg, Gal, L
Convert aviation fuel, oil, hydraulic fluid, and water volumes instantly to weight values across Gallons, Liters, Pounds, and Kilograms.
AVIATION FLUID & FUEL WEIGHT CONVERTER
Converted Equivalent Matrix
How to Convert Aviation Fluid Weight
Flight planning, aircraft weight and balance configurations, and maintenance fluid tracking require precise translations between liquid volume and total mass. While fluids are pumped and stored by volume (Liters or US Gallons), aircraft operational limits, max takeoff weights, and fuel consumption profiles are calculated exclusively by weight (Pounds or Kilograms).
Because different aircraft fluids have distinct chemical properties, their weight varies significantly per unit of volume based on their individual nominal densities:
- Volume Units: Tracked via US Gallons (GAL) or Liters (L). One US Gallon is exactly equal to 3.78541178 Liters.
- Weight / Mass Units: Tracked via Pounds (lbs) or Kilograms (kg). One Pound is exactly equal to 0.45359237 Kilograms.
Aviation Fluid Densities & Applications
Fluid densities change based on ambient temperatures, but aviation regulators and manufacturers mandate specific nominal density constants for safety margins during pre-flight loading and calculations.
| Fluid / Fuel Type | Nominal Density | Core Aviation Application |
| Jet-A / Jet-A1 | 6.74 lbs/gal | Kerosene-based turbine fuel used in commercial airliners, cargo transports, and business jets. |
| Avgas (100LL) | 6.00 lbs/gal | Aviation Gasoline utilized by piston-engine light aircraft and training fleets. |
| Aviation Mogas | 6.15 lbs/gal | Automotive-grade unleaded fuel certified for specific light sport aircraft and rotax engines. |
| Skydrol Hydraulic Fluid (LD-4) | 8.31 lbs/gal | Advanced fire-resistant phosphate-ester hydraulic fluid for high-pressure transport aircraft systems. |
| MIL-H-5606 Hydraulic (Red Oil) | 7.24 lbs/gal | Mineral-based hydraulic fluid used primarily in landing gear shock struts, brakes, and light aircraft systems. |
| Aviation Engine Oil | 7.50 lbs/gal | Mineral or synthetic oils used for internal lubrication and cooling of piston and turbine powerplants. |
| Potable / Lavatory Water | 8.34 lbs/gal | Fresh water loaded for passenger cabin services and baseline mass allocation calculations. |
| ADI Water-Methanol Injection | 7.12 lbs/gal | Anti-Detonation Injection fluid used in legacy piston or turboprop engines to boost emergency takeoff thrust. |
Complete Plain-Text Conversion Formulas
To perform manual fluid mass calculations, extract your target fluid’s nominal density from the reference guide above and apply the relevant plain-text calculation paths:
Core Metric Unit Bases
- US Gallons to Liters: Liters = Gallons * 3.78541178
- Liters to US Gallons: Gallons = Liters / 3.78541178
- Pounds to Kilograms: Kilograms = Pounds * 0.45359237
- Kilograms to Pounds: Pounds = Kilograms / 0.45359237
Converting Volume to Weight
- Gallons to Pounds: Pounds = Gallons * Density (lbs/gal)
- Liters to Pounds: Pounds = (Liters / 3.78541178) * Density (lbs/gal)
- Gallons to Kilograms: Kilograms = (Gallons * Density (lbs/gal)) * 0.45359237
- Liters to Kilograms: Kilograms = ((Liters / 3.78541178) * Density (lbs/gal)) * 0.45359237
Converting Weight to Volume
- Pounds to Gallons: Gallons = Pounds / Density (lbs/gal)
- Kilograms to Gallons: Gallons = (Kilograms / 0.45359237) / Density (lbs/gal)
- Pounds to Liters: Liters = (Pounds / Density (lbs/gal)) * 3.78541178
- Kilograms to Liters: Liters = ((Kilograms / 0.45359237) / Density (lbs/gal)) * 3.78541178
Fluid Mass Equivalents Quick Reference Matrix
This reference table showcases the precise operational values processed by the conversion terminal for a standard payload sample of 100 volume units across all eight fluids:
| Selected Fluid Type | 100 US Gallons in Pounds | 100 US Gallons in Kilograms | 100 Liters in Pounds | 100 Liters in Kilograms |
| Jet-A / Jet-A1 | 674.00 lbs | 305.72 kg | 178.05 lbs | 80.76 kg |
| Avgas (100LL) | 600.00 lbs | 272.16 kg | 158.50 lbs | 71.89 kg |
| Aviation Mogas | 615.00 lbs | 278.96 kg | 162.46 lbs | 73.70 kg |
| Skydrol Hydraulic Fluid | 831.00 lbs | 376.94 kg | 219.53 lbs | 99.58 kg |
| MIL-H-5606 Hydraulic (Red Oil) | 724.00 lbs | 328.40 kg | 191.26 lbs | 86.75 kg |
| Aviation Engine Oil | 750.00 lbs | 340.19 kg | 198.13 lbs | 89.87 kg |
| Potable / Lavatory Water | 834.00 lbs | 378.30 kg | 220.32 lbs | 99.94 kg |
| ADI Water-Methanol Injection | 712.00 lbs | 322.96 kg | 188.09 lbs | 85.32 kg |