Volume Converter Free Online Tool 2026

Last updated March 22, 2026

Volume Unit Conversion Reference

The Volume Converter converts between metric (liters, milliliters), US customary (gallons, quarts, pints, cups, fluid ounces), imperial (UK gallons, pints), and cubic units. Enter any value and see all equivalents simultaneously.

1 Liter in All Units

Input: 1 liter

Metric:
  1,000 milliliters (mL)
  100 centiliters (cL)
  10 deciliters (dL)
  1 liter (L)
  0.001 kiloliter (kL)

US Customary:
  33.814 US fluid ounces
  6.763 US cups
  2.113 US pints
  1.057 US quarts
  0.264 US gallons
  67.628 US tablespoons
  202.884 US teaspoons

Imperial (UK):
  35.195 imperial fluid ounces
  1.760 imperial pints
  0.880 imperial quarts
  0.220 imperial gallons

Cubic:
  1,000 cubic centimeters (cm³)
  0.001 cubic meters (m³)
  0.061 cubic inches (in³)
  0.000035 cubic feet (ft³)

US vs Imperial Gallon Difference

US gallon:       3.785 liters
Imperial gallon: 4.546 liters
Difference:      0.761 liters (20% larger for imperial)

This matters for:
  Fuel economy: "30 mpg" means different things in US vs UK
    US: 30 miles per 3.785L = 7.93 L/100km
    UK: 30 miles per 4.546L = 9.41 L/100km

  Fuel prices: comparing $/gallon between countries
    US $3.50/gallon = $0.925/liter
    UK £1.50/liter  = £6.82/imperial gallon

  Recipes: UK recipe "1 pint of milk" ≠ US "1 pint of milk"
    US pint:       473 mL
    Imperial pint: 568 mL

Cooking Conversions

US Recipe → Metric:
  1 teaspoon    = 4.929 mL  ≈ 5 mL
  1 tablespoon  = 14.787 mL ≈ 15 mL
  1/4 cup       = 59.147 mL ≈ 60 mL
  1/3 cup       = 78.863 mL ≈ 80 mL
  1/2 cup       = 118.294 mL ≈ 120 mL
  1 cup         = 236.588 mL ≈ 240 mL
  2 cups (1 pt) = 473.176 mL ≈ 475 mL
  4 cups (1 qt) = 946.353 mL ≈ 950 mL

Metric Recipe → US:
  100 mL = 6.76 tablespoons ≈ 7 tbsp
  250 mL = 1.057 cups ≈ 1 cup + 1 tbsp
  500 mL = 2.113 cups ≈ 2 cups + 2 tbsp
  1 L    = 4.227 cups ≈ 4 cups + 3 tbsp

Common Volume Conversions

Cooking:
  1 US cup     = 236.6 mL
  1 UK pint    = 568.3 mL
  1 US pint    = 473.2 mL
  1 US quart   = 946.4 mL
  1 US gallon  = 3,785.4 mL = 3.785 L

Beverages:
  Standard wine bottle  = 750 mL = 25.4 fl oz
  Standard beer can     = 355 mL = 12 fl oz
  Standard beer bottle  = 330 mL = 11.2 fl oz
  2-liter soda bottle   = 2,000 mL = 67.6 fl oz = 0.528 US gal

Fuel:
  1 US gallon  = 3.785 L
  1 UK gallon  = 4.546 L
  20 L         = 5.283 US gallons = 4.399 UK gallons

Water:
  1 cubic meter = 1,000 liters = 264.2 US gallons

Scientific and Laboratory Volumes

1 microliter (μL) = 0.001 mL = 0.000001 L
1 milliliter (mL) = 1 cm³ = 1 cc
1 liter (L)       = 1,000 mL = 1 dm³
1 cubic meter (m³) = 1,000 L = 1,000,000 mL

Common lab measurements:
  PCR reaction:     20–50 μL
  ELISA well:       100–200 μL
  Standard cuvette: 1–3 mL
  Flask (small):    50–250 mL
  Flask (large):    500–2,000 mL

Water density (for volume ↔ mass):
  1 mL of water ≈ 1 gram
  1 L of water  ≈ 1 kilogram
  1 US gallon of water ≈ 3.785 kg ≈ 8.34 lbs

Industrial and Large Volume Conversions

1 cubic foot (ft³)  = 28.317 liters = 7.481 US gallons
1 cubic yard (yd³)  = 764.555 liters = 201.97 US gallons
1 cubic meter (m³)  = 1,000 liters = 264.17 US gallons
1 barrel (oil)      = 158.987 liters = 42 US gallons
1 barrel (beer US)  = 117.348 liters = 31 US gallons

Swimming pool (Olympic):
  50m × 25m × 2m = 2,500 m³ = 2,500,000 liters = 660,430 US gallons

Fuel tank (average car):
  ~50 liters = 13.2 US gallons = 11 UK gallons

Volume Conversion in Code

// JavaScript — volume converter
const volumeInLiters = {
  milliliter: 0.001,
  centiliter: 0.01,
  deciliter: 0.1,
  liter: 1,
  kiloliter: 1000,
  us_teaspoon: 0.00492892,
  us_tablespoon: 0.0147868,
  us_fluid_ounce: 0.0295735,
  us_cup: 0.236588,
  us_pint: 0.473176,
  us_quart: 0.946353,
  us_gallon: 3.78541,
  imperial_pint: 0.568261,
  imperial_gallon: 4.54609,
  cubic_inch: 0.0163871,
  cubic_foot: 28.3168,
  cubic_meter: 1000,
};

function convertVolume(value, from, to) {
  const liters = value * volumeInLiters[from];
  return liters / volumeInLiters[to];
}

convertVolume(1, 'us_gallon', 'liter');    // 3.78541
convertVolume(250, 'milliliter', 'us_cup'); // 1.0567

Quick Reference Card

1 US gallon  = 4 quarts = 8 pints = 16 cups = 128 fl oz = 3.785 L
1 UK gallon  = 4 quarts = 8 pints = 160 fl oz = 4.546 L
1 liter      = 1.057 US quarts = 33.8 US fl oz
1 cup (US)   = 8 fl oz = 237 mL
1 tbsp (US)  = 3 tsp = 15 mL
1 tsp (US)   = 5 mL