Free Online Volume Converter

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Volume converter for every common liquid measurement — milliliters, liters, cubic meters, cooking units (teaspoon, tablespoon, US cup), US customary (fluid ounce, pint, quart, gallon) and UK imperial pints and gallons. US and UK gallons differ by ~20% and are clearly labelled to prevent mix-ups. Type a value on either side; the result updates instantly. Everything runs 100% inside your browser; nothing is uploaded.

Supported units: Milliliter (ml), Liter (L), Cubic meter (m³), Teaspoon (tsp), Tablespoon (tbsp), Fluid ounce (US), Cup (US), Pint (US), Quart (US), Gallon (US), Pint (UK), Gallon (UK).

Liter (L) → Gallon (US)

Quick reference table

Liter (L)Gallon (US)
1 L0.2642 gal (US)
2 L0.5283 gal (US)
5 L1.3209 gal (US)
10 L2.6417 gal (US)
25 L6.6043 gal (US)
50 L13.2086 gal (US)
100 L26.4172 gal (US)

US vs UK volume measurements: why gallons differ

The US gallon and the UK imperial gallon share a name but are not the same unit. The US gallon, defined as exactly 231 cubic inches (3.785 L), traces back to the British wine gallon used in colonial America. After American independence, the UK redefined its gallon in 1824 as exactly 10 lb of water at 62 °F — about 4.546 L, roughly 20 % larger. Both countries kept their own version, so a "5-gallon" gas can in the US holds 18.93 L, while a UK "5-gallon" jerrycan holds 22.73 L. Fluid ounces, pints and quarts inherit the same divergence: 1 US fl oz = 29.57 ml, 1 UK fl oz = 28.41 ml; 1 US pint = 473 ml, 1 UK pint = 568 ml. This converter labels every US and UK unit explicitly to prevent the most common cooking and fuel-economy errors.

Cooking measurements: tsp, tbsp, cup explained

Modern English-language recipes use US cooking units almost universally: 1 teaspoon (tsp) = 5 ml (technically 4.93 ml), 1 tablespoon (tbsp) = 3 tsp = 15 ml (technically 14.79 ml), 1 cup = 8 US fl oz = 236.59 ml (US customary cup, the dominant cooking standard). Older British and Australian recipes occasionally use a larger tbsp (17.76 ml UK, 20 ml AU), but mainstream cookbooks have converged on the US standard. The US legal cup (240 ml) used in nutrition labelling is 1.4 % larger than the customary 8-fl-oz cup — small enough that recipe results are indistinguishable. This converter uses the customary 8-fl-oz cup throughout.

Glossary

Milliliter (ml)

A milliliter is one thousandth of a liter and exactly one cubic centimeter (1 ml = 1 cm³ = 0.001 L). It is the everyday metric unit for medication doses, beverage cans, cooking ingredients and lab work. A typical wine glass holds 175 ml; a standard espresso shot is about 30 ml; a 0.5 L water bottle is 500 ml.

Liter (L)

A liter is the standard metric unit of volume, equal to 1 cubic decimeter (1 L = 1000 ml = 0.001 m³). It is used worldwide for beverages, fuel sold in metric markets, kitchen recipes and small-scale chemistry. One US gallon holds about 3.785 L; one UK imperial gallon holds about 4.546 L. The symbol is "L" or "l" (capital L preferred to avoid confusion with the digit 1).

Cubic meter (m³)

A cubic meter is the SI derived unit for volume, equal to 1000 liters or 1 million milliliters. It is the standard unit for shipping container capacities, construction-material quantities, gas-meter readings, water-utility billing and bulk industrial volumes. One m³ of water at 4 °C weighs exactly 1000 kg (1 tonne).

Teaspoon (tsp)

A teaspoon is a cooking volume measure equal to 1/3 of a US tablespoon, or about 4.93 ml. Modern recipes worldwide use this US-standard 5 ml teaspoon; older British and Australian cookbooks may differ slightly. Three teaspoons make one tablespoon; 48 teaspoons make one US cup; six teaspoons make one US fluid ounce.

Tablespoon (tbsp)

A tablespoon is a cooking volume measure equal to 3 teaspoons or about 14.79 ml. The US standard tablespoon is the dominant convention in modern recipes; the UK tablespoon (≈17.76 ml) and the Australian tablespoon (20 ml) differ but are rarely used in international recipes. Sixteen tablespoons make one US cup; two tablespoons make one US fluid ounce.

US fluid ounce (fl oz)

A US fluid ounce is exactly 1/128 of a US gallon, or about 29.5735 ml. It is the dominant volume unit on US food, drink and personal-care packaging. Eight US fluid ounces make one US cup; 16 make a US pint; 32 make a quart; 128 make a US gallon. Do not confuse with the UK fluid ounce (≈28.41 ml).

US cup

A US customary cup is exactly 8 US fluid ounces or about 236.59 ml — the value used in most US recipes and on cooking measuring cups. The US legal cup used in nutrition labelling is slightly larger at exactly 240 ml (a 1.4 % difference). This converter uses the customary 8-fl-oz cup. One cup contains 16 tablespoons or 48 teaspoons.

US pint

A US liquid pint is exactly 16 US fluid ounces or about 473.18 ml. Used for beer, dairy and cocktail recipes in the United States. Two cups make a US pint; two pints make a quart; eight pints make a US gallon. Do not confuse with the UK imperial pint (≈568.26 ml) — a UK pint is about 20 % larger.

US quart

A US liquid quart is exactly 32 US fluid ounces, two US pints or one quarter of a US gallon, equal to about 946.35 ml. Used for milk cartons, paint cans, motor oil and US recipes. Four quarts make a US gallon. The dry quart (≈1.101 L), used historically for produce, is a different unit and not handled here.

US gallon

A US liquid gallon is exactly 231 cubic inches, or 3.785411784 L. It is the everyday US unit for fuel, milk, paint and bulk household liquids. One US gallon contains 4 quarts, 8 pints or 128 US fluid ounces. The UK imperial gallon (≈4.546 L) is about 20 % larger and is a different unit — always check which is meant.

UK (imperial) pint

A UK imperial pint is exactly 20 UK fluid ounces or 568.26125 ml — about 20 % larger than the US pint (473.18 ml). Used in the United Kingdom for draft beer, cider and milk. UK pubs are required by law to serve beer in pint or half-pint glasses. Eight UK pints make one UK imperial gallon.

UK (imperial) gallon

A UK imperial gallon is exactly 4.54609 L or 277.4194 cubic inches — about 20 % larger than the US gallon (3.785 L). Used in the United Kingdom and a few Caribbean countries for fuel economy figures (miles per UK gallon) and historical recipes. One UK imperial gallon equals 8 UK pints or 160 UK fluid ounces.

Related tools

Liters to US Gallons
Convert liters to US gallons — 1 L = 0.2642 US gal
Gallons to Liters
Convert US gallons to liters — 1 US gal = 3.7854 L
US Cups to Milliliters
Convert US cups to ml — 1 US cup = 240 ml
Milliliters to US Cups
Convert ml to US cups — 240 ml = 1 US cup
US Fluid Ounces to Milliliters
Convert US fl oz to ml — 1 fl oz = 29.5735 ml
Tablespoons to Milliliters
Convert tablespoons to ml — 1 tbsp ≈ 14.79 ml (US)
US Gallons to UK Gallons
Convert US gallons to UK imperial gallons — 1 US gal ≈ 0.833 UK gal
Length Converter
Convert length units between metric and imperial — mm, cm, m, km, inches, feet, yards, miles