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Volume Unit Converter

Convert volume across metric, US liquid, cubic measures, and oil barrels in one place.

Convert from

Edit the amount or change the source unit to load the convert library; until then results use the same built-in factors.

Values match US definitions where applicable (gallon = 231 in³). For UK/imperial recipes, use a dedicated imperial fluid converter.

All other units

Equivalent volumes across metric, US customary, and common cubic measures.

Milliliters (mL)1,000
Cubic centimeters (cc, cm³)1,000
US teaspoons (tsp)202.8841362111
US tablespoons (tbsp)67.6280454037
US fluid ounces (fl oz)33.8140227018
US cups (cup)4.2267528377
US liquid pints (pt)2.1133764189
US liquid quarts (qt)1.0566882094
US liquid gallons (gal)0.2641720524
Oil barrels (bbl, 42 US gal)0.0062898108
Cubic inches (in³)61.0237440947
Cubic feet (ft³)0.0353146667
Cubic yards (yd³)0.0013079506

How to Use This Tool

  1. Enter the amount.
  2. Select the source unit.
  3. Read the live table or Copy all.
  4. After you edit, an optional convert library may load.
  5. For JSON, use {"value":N,"from":"unitKey"} — see Examples.

Learn More About Volume Unit Converter

Understanding volume units

  • Metric: milliliters and liters tie to the SI liter (1 L = 1000 mL).
  • US liquid: gallon, quart, pint, cup, tablespoon, teaspoon, and fluid ounce use US definitions (gallon = 231 cubic inches).
  • Cubic: in³, ft³, yd³ are included for construction and shipping.
  • Oil barrel: one industry barrel = 42 US liquid gallons.

JSON keys

Use the same from strings as the pair tools (liter, milliliter, `uscup`, `usliquidgallon`, `cubicfoot, oil_barrel, etc.). The processor returns rows with key, label, and value` for each destination unit.

Imperial (UK) gallons differ from US gallons; use a dedicated imperial fluid tool when needed.

About

Use this volume converter when you have one number and want every common unit at once: metric milliliters and liters, US teaspoons through gallons, cubic inches through cubic yards, and the 42-US-gallon oil barrel. Pick the unit your measurement is in, type the amount, and scan the table or copy it wholesale.

How the UI works: The Amount field holds your numeric value. The Source unit selector says what that number represents (for example, 3 in US liquid gallons). All other rows are computed from the same liter backbone, so they stay mutually consistent.

Lazy precision library: When you first edit the amount or change the source unit, the tool can load the convert package in the browser so strings like US liquid gallon match npm-based workflows. The built-in factors are the same definitions, so you see correct values immediately either way.

Structured input: For batch jobs or APIs, send JSON {"value": <number>, "from": "<unitKey>"}. The processor returns inputValue, from, human-readable fromLabel, total liters, an ordered rows list (key, label, value per unit), and order for unit ordering. Pair converters on this site use to as well; this tool omits to because it emits every destination at once.

Reference

US liquid gallon3.785411784 liters (definition)
Industry oil barrel42 US liquid gallons

Examples

2 liters → all other units

Full processor response: liters field equals input when from is liter; rows list every other unit.
Input
{"value":2,"from":"liter"}
Output
{"inputValue":2,"from":"liter","fromLabel":"Liters (L)","liters":2,"rows":[{"key":"milliliter","label":"Milliliters (mL)","value":2000},{"key":"cc","label":"Cubic centimeters (cc, cm³)","value":2000},{"key":"us_teaspoon","label":"US teaspoons (tsp)","value":405.76827242211596},{"key":"us_tablespoon","label":"US tablespoons (tbsp)","value":135.256090807372},{"key":"us_fluid_ounce","label":"US fluid ounces (fl oz)","value":67.628045403686},{"key":"us_cup","label":"US cups (cup)","value":8.45350567546075},{"key":"us_liquid_pint","label":"US liquid pints (pt)","value":4.226752837730375},{"key":"us_liquid_quart","label":"US liquid quarts (qt)","value":2.1133764188651876},{"key":"us_liquid_gallon","label":"US liquid gallons (gal)","value":0.5283441047162969},{"key":"oil_barrel","label":"Oil barrels (bbl, 42 US gal)","value":0.012579621540864212},{"key":"cubic_inch","label":"Cubic inches (in³)","value":122.04748818946457},{"key":"cubic_foot","label":"Cubic feet (ft³)","value":0.07062933344297717},{"key":"cubic_yard","label":"Cubic yards (yd³)","value":0.002615901238628784}],"order":["milliliter","cc","liter","us_teaspoon","us_tablespoon","us_fluid_ounce","us_cup","us_liquid_pint","us_liquid_quart","us_liquid_gallon","oil_barrel","cubic_inch","cubic_foot","cubic_yard"]}

1 US liquid gallon → all other units

Shows how from usliquidgallon fills the table (about 3.785 L total).

Input
{"value":1,"from":"us_liquid_gallon"}
Output
{"inputValue":1,"from":"us_liquid_gallon","fromLabel":"US liquid gallons (gal)","liters":3.785411784,"rows":[{"key":"milliliter","label":"Milliliters (mL)","value":3785.411784},{"key":"cc","label":"Cubic centimeters (cc, cm³)","value":3785.411784},{"key":"liter","label":"Liters (L)","value":3.785411784},{"key":"us_teaspoon","label":"US teaspoons (tsp)","value":768},{"key":"us_tablespoon","label":"US tablespoons (tbsp)","value":256},{"key":"us_fluid_ounce","label":"US fluid ounces (fl oz)","value":128},{"key":"us_cup","label":"US cups (cup)","value":16},{"key":"us_liquid_pint","label":"US liquid pints (pt)","value":8},{"key":"us_liquid_quart","label":"US liquid quarts (qt)","value":4},{"key":"oil_barrel","label":"Oil barrels (bbl, 42 US gal)","value":0.02380952380952381},{"key":"cubic_inch","label":"Cubic inches (in³)","value":231},{"key":"cubic_foot","label":"Cubic feet (ft³)","value":0.13368055555555555},{"key":"cubic_yard","label":"Cubic yards (yd³)","value":0.004951131687242798}],"order":["milliliter","cc","liter","us_teaspoon","us_tablespoon","us_fluid_ounce","us_cup","us_liquid_pint","us_liquid_quart","us_liquid_gallon","oil_barrel","cubic_inch","cubic_foot","cubic_yard"]}

Features

One amount, every unit

Pick where the number lives (e.g. cups) and see milliliters, liters, gallons, cubic inches, barrels, and the rest at once.

Copy the whole table

Copy all lines as text for recipes, specs, or email without retyping.

JSON in and out

Examples below show the exact processor payload and full JSON output shape for integrations.

Use Cases

  • Converting cooking recipes from metric to imperial units
  • Calculating liquid volumes in chemistry experiments
  • Converting between different measurement standards
  • Understanding the capacity of containers

Frequently Asked Questions

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