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Volume Converter

Convert between litres, gallons, cups, fluid ounces, cubic metres and 10 more volume units — all results shown simultaneously.

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15 volume unitsBIPM-verified factorsUpdated July 2026

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Quick reference — Litres conversions

L	mL	cL	m³	cm³
1	1,000	100	0.001	1,000
5	5,000	500	0.005	5,000
10	10,000	1,000	0.01	10,000
25	25,000	2,500	0.025	25,000
50	50,000	5,000	0.05	50,000
100	100,000	10,000	0.1	100,000

Ejemplos prácticos

Recipe scaling: 1 US cup to millilitres

A US cup is exactly 236.59 mL. When scaling a recipe from cups to millilitres for a kitchen scale, enter 1 in the cups field — the converter shows 236.59 mL, 0.237 litres, and 8 fl oz simultaneously.

Petrol tank: litres to US gallons

A 60-litre UAE petrol tank equals 15.85 US gallons. If you are comparing fuel economy figures between a UAE spec sheet (litres/100 km) and a US spec sheet (mpg), the volume converter is your first step.

Swimming pool: cubic metres to litres

A standard 25 m × 10 m × 1.4 m competition pool holds 350 m³. Enter 350 in the cubic metres field — the converter shows 350,000 litres (350 kL), which is what your water supplier will invoice.

Preguntas frecuentes

~4 min read

How many litres in a US gallon?▾

One US gallon equals exactly 3.785411784 litres. This is the legal definition used in the United States since 1964. Note that a UK (imperial) gallon is larger: 4.54609 litres.

What is the difference between a US gallon and a UK gallon?▾

A US liquid gallon is 3.785 litres, while a UK imperial gallon is 4.546 litres — about 20% larger. This matters when comparing fuel prices or efficiency figures between the two countries.

How many millilitres in a cup?▾

One US legal cup is exactly 240 mL. However, the US customary cup used in most recipes is 236.588 mL. This converter uses the customary definition (236.59 mL) since most recipe books follow that standard.

How do I convert cubic metres to litres?▾

One cubic metre (m³) equals exactly 1,000 litres. So multiply cubic metres by 1,000 to get litres. This relationship comes directly from the SI definition: 1 litre = 1 decimetre³ = 0.001 m³.

What is a fluid ounce (fl oz)?▾

A US fluid ounce is 29.574 mL. A UK fluid ounce is slightly larger at 28.413 mL. This converter uses the US definition. There are 128 US fl oz in a US gallon and 8 fl oz in a US cup.

How many teaspoons in a tablespoon?▾

Exactly 3 teaspoons equal 1 tablespoon in both the US and the metric system. One tablespoon is approximately 14.79 mL (US) or 15 mL (metric tablespoon used in Australia and Canada).

Why does the UAE use litres for fuel but the US uses gallons?▾

The UAE, like most countries worldwide, follows the metric system, where litres are the standard volume unit for fuel. The United States retains the customary gallon, inherited from the British imperial system, for historical and commercial reasons.

What is the cubic centimetre (cm³) used for?▾

Cubic centimetres are commonly used in medicine (drug dosages: 1 cm³ = 1 mL), engineering (engine displacement), and 3D printing (material volume). One cm³ is exactly 1 mL.

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Conversion factors are based on SI definitions and US customary standards. US and UK gallons differ — verify which standard applies to your use case.