Gallons to Pounds Converter
Convert between gallons and pounds for water, oil, fuel, milk, and 40+ liquids with precise density calculations
Gallons ↔ Pounds Converter
Density: 8.345 lb/gal (H₂O)
Conversion Results
Common Container Examples
| Container | Capacity | Water Weight | Common Use |
|---|---|---|---|
| 5-Gallon Bucket | 5 gal | 41.7 lbs | Water storage, paint |
| 55-Gallon Drum | 55 gal | 459.0 lbs | Industrial chemicals, oil |
| Gas Tank (Car) | 15 gal | 125.2 lbs | Fuel capacity |
| Milk Jug | 1 gal | 8.3 lbs | Household liquids |
| Swimming Pool (Small) | 10000 gal | 83454.0 lbs | Residential pool |
| Tanker Truck | 8000 gal | 66763.2 lbs | Fuel delivery |
Density Quick Reference
Conversion Tips
Water at room temperature weighs about 8.34 pounds per gallon
Gasoline is lighter than water at about 6.07 pounds per gallon
Temperature affects liquid density - use specific values for accuracy
UK gallons are 20% larger than US gallons
Understanding Volume to Weight Conversion
Why Volume and Weight Differ
Gallons measure volume (space occupied), while pounds measure weight (gravitational force on mass). The relationship between them depends on the liquid's density - how much mass is packed into each gallon.
The Density Formula
Weight (pounds) = Volume (gallons) × Density (lb/gal)
This fundamental relationship allows us to convert between volume and weight for any liquid when we know its density.
Factors Affecting Density
- •Temperature: Most liquids become less dense when heated
- •Pressure: Higher pressure can increase density
- •Composition: Mixtures and solutions have variable densities
- •Dissolved substances: Salt in water increases density
Important: For critical applications (shipping, chemical processing), always verify density values with current specifications and environmental conditions.
Real-World Applications
🚛 Transportation & Shipping
Calculate payload weights for trucks, ships, and aircraft. Critical for safety regulations and fuel efficiency planning.
🏭 Industrial Processing
Batch calculations, storage tank planning, and chemical mixing ratios in manufacturing processes.
🏊 Pool & Spa Maintenance
Determine chemical dosing amounts and understand structural load requirements for pools and hot tubs.
⛽ Fuel Management
Fuel consumption calculations, tank capacity planning, and fuel cost analysis for vehicles and equipment.
🍯 Food & Beverage
Recipe scaling, ingredient purchasing, and nutritional calculations for commercial and home cooking.
🌾 Agriculture
Grain storage calculations, liquid fertilizer applications, and livestock feed planning.