Liters to Gallons Converter

How to Convert Liters to Gallons?

To convert liters to US gallons, divide by 3.78541. One US gallon equals 3.78541 liters. Conversely, one liter equals 0.26417 US gallons. A 2-liter bottle holds 0.528 gallons. A standard US gallon of milk is 3.785 liters. Note that US gallons and Imperial (UK) gallons are different: 1 Imperial gallon = 4.546 liters, about 20% larger than a US gallon. Enter any volume in the converter above for instant results in both directions.

Quick Reference Table

1 L = 0.264 US gal. 2 L = 0.528 gal. 3 L = 0.793 gal. 4 L = 1.057 gal. 5 L = 1.321 gal. 10 L = 2.642 gal. 15 L = 3.963 gal. 20 L = 5.283 gal. 25 L = 6.604 gal. 30 L = 7.925 gal. 40 L = 10.567 gal. 50 L = 13.209 gal. 75 L = 19.813 gal. 100 L = 26.417 gal. For quick mental math, divide liters by 4 for a rough gallon estimate (accurate within 5.4%). A liter is slightly more than a quart (1 quart = 0.946 liters).

US Gallons vs Imperial Gallons

The US gallon (128 fluid ounces, 3.785 liters) and Imperial gallon (160 fluid ounces, 4.546 liters) share a name but differ significantly in volume. The Imperial gallon is about 20% larger. This distinction matters for fuel economy ratings: a car getting 30 miles per Imperial gallon gets only 25 miles per US gallon. When a UK recipe calls for "a gallon" of anything, it means the Imperial gallon. Canadian gas stations sell fuel in liters, but older Canadians may reference Imperial gallons from pre-metrication times. Always verify which gallon is intended in international contexts.

Fuel Economy and Gas Prices

Understanding liters-to-gallons conversion is essential for comparing fuel costs and efficiency across countries. US fuel is priced per gallon. Nearly every other country prices fuel per liter. If gas costs $1.50 per liter in Europe, that is $5.68 per US gallon. If US gas costs $3.50 per gallon, that is $0.92 per liter. Fuel efficiency: US cars rate in miles per gallon (MPG). Most countries use liters per 100 kilometers (L/100km). A car getting 30 MPG uses about 7.84 L/100km. The conversion is: L/100km = 235.215 / MPG. Lower L/100km means better efficiency.

Liters to Gallons for Pools and Tanks

Swimming pools, water tanks, aquariums, and hot tubs are sized in gallons (US) or liters. A standard US above-ground pool (15 ft diameter, 4 ft deep) holds about 5,310 gallons or 20,100 liters. A 50-gallon water heater holds 189 liters. A 10-gallon aquarium holds 37.85 liters. Hot tubs typically hold 300-500 gallons (1,136-1,893 liters). These conversions matter for calculating water costs, chemical treatment quantities, fill times, and heating requirements, especially when consulting guides or products from different countries.

Cooking and Beverage Volumes

Beverage containers use both units. A standard wine bottle is 750 ml (0.198 gallons). A beer keg (US half-barrel) holds 15.5 gallons (58.67 liters). A 2-liter soda bottle holds 0.528 gallons. Milk in the US comes in gallon (3.785 L), half-gallon (1.893 L), and quart (0.946 L) containers. European milk typically comes in 1-liter containers. Craft brewing recipes may list water volumes in either gallons or liters depending on the recipe source. Understanding both units prevents errors when scaling international recipes or purchasing equipment rated in the unfamiliar unit.

Other Volume Unit Relationships

1 US gallon = 4 quarts = 8 pints = 16 cups = 128 fluid ounces. 1 liter = 1,000 milliliters = 1 cubic decimeter. 1 cubic meter = 1,000 liters = 264.17 US gallons. 1 barrel (oil) = 42 US gallons = 158.987 liters. 1 acre-foot (water management) = 325,851 gallons = 1,233,482 liters. These relationships connect liters and gallons to the broader web of volume measurements used in cooking, industry, agriculture, and petroleum. The liter has the advantage of simple decimal relationships: 1 mL = 1 cm³ = 1 g of water, making metric volume calculations cleaner.

Water Weight from Volume

One liter of water weighs exactly one kilogram at standard conditions, and one US gallon of water weighs approximately 8.345 pounds. This relationship simplifies many practical calculations: a 50-gallon water heater full of water weighs about 417 pounds (189 kg) plus the weight of the tank itself. A 1,000-liter water tank weighs one metric ton when full. These weight estimates are essential for structural load planning, transportation logistics, and aquarium support calculations.

Frequently asked questions