A liter calculator converts between liters and 30+ volume units including gallons, milliliters, cups, cubic meters, and fluid ounces.
A liter (L) is the most common metric unit for measuring liquid volume. One liter equals exactly 1,000 milliliters (mL), 1,000 cubic centimeters (cm³), or 1 cubic decimeter (dm³). The liter is accepted for use with the International System of Units (SI) alongside the cubic meter.
A liter is approximately the volume of a 10 cm × 10 cm × 10 cm cube — about the size of a standard water bottle.
Key liter conversions:
= 1,000 mL = 0.264 US gal = 33.81 fl oz = 4.23 cups = 61.02 in³.
= 0.5 L = 0.132 US gal = 16.91 fl oz = 2.11 cups.
= 2,000 mL = 0.528 US gal = 67.63 fl oz = 8.45 cups.
= 1 m³ = 264.17 US gal = 35.31 ft³ = 1.308 yd³.
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Answers to common questions about the liter calculator.
1 liter = 1,000 milliliters (mL) exactly. The prefix "milli-" means one-thousandth. 1 mL = 1 cm³ = 1 cc.
1 liter = 4.227 US cups. Or approximately 4¼ cups. 1 US cup = 236.59 mL = 0.2366 L.
1 US gallon = 3.785 liters. 1 Imperial gallon = 4.546 liters. To convert liters to gallons: divide by 3.785.
Yes, exactly. 1 L = 1 dm³ = 1,000 cm³ = 0.001 m³. This relationship is exact by definition.
1 liter of water weighs 1 kilogram (at 4°C, when water is most dense). At room temperature (~20°C), it weighs 0.998 kg — practically 1 kg.