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Volume Converter

Volume conversions cross between metric (liters, ml, m³) and US/imperial (gallons, quarts, cups). Take care: the US gallon (3.78541 L) is smaller than the imperial gallon (4.54609 L) — almost a 20% difference.

🧪 Volume Converter

Convert volume units quickly and accurately

1000

1 L=1000 mL

Liter → Milliliter Table

Liter (L)Milliliter (mL)
0.0011
0.0110
0.1100
11000
22000
55000
1010000
2525000
5050000
100100000
10001000000
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History & Background

The liter was defined in 1795 as the volume of one cubic decimeter (1 dm³). The US gallon descends from the English "Queen Anne wine gallon" of 1707; the imperial gallon, introduced in 1824, was redefined as 10 lb of water at 62 °F.

Conversion Formulas

  • 1 L = 1,000 ml = 0.264172 US gal
  • 1 US gallon = 3.78541 L
  • 1 imperial gallon = 4.54609 L
  • 1 m³ = 1,000 L
  • 1 US cup = 236.588 ml

Common Values

  • 1 L = 33.814 fl oz (US)
  • 1 US gal = 3.785 L = 4 quarts
  • 500 ml ≈ 16.9 fl oz
  • 1 cup = 236.6 ml
  • 1 m³ = 264.17 US gal

Common Uses

  • Cooking and baking recipes
  • Fuel economy comparisons (mpg vs L/100 km)
  • Aquariums and pool capacity
  • Manufacturing and chemical batching
  • Beverage industry and shipping

Frequently Asked Questions

How many liters in a US gallon?

3.78541 L exactly.

Are US and UK gallons the same?

No. 1 US gal = 3.785 L; 1 imperial (UK) gal = 4.546 L — about 20% bigger.

How many ml in a fl oz?

29.5735 ml (US) or 28.4131 ml (imperial).

How big is 1 cubic meter?

1,000 liters — about the volume of a small kitchen fridge.

Reviewed by the ConvertProf editorial team. All conversion factors follow internationally agreed standards (SI, ISO, NIST). Spotted an error? Email hello@convertprof.com.
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