- Enter the amount.
- Select the source unit.
- Read the live table or Copy all.
- After you edit, an optional convert library may load.
- For JSON, use {"value":N,"from":"unitKey"} — see Examples.
Volume Unit Converter
Convert volume across metric, US liquid, cubic measures, and oil barrels in one place.
| Milliliters (mL) | 1000 |
| Cubic centimeters (cc, cm³) | 1000 |
| US teaspoons (tsp) | 202.88413621105798 |
| US tablespoons (tbsp) | 67.628045403686 |
| US fluid ounces (fl oz) | 33.814022701843 |
| US cups (cup) | 4.226752837730375 |
| US liquid pints (pt) | 2.1133764188651876 |
| US liquid quarts (qt) | 1.0566882094325938 |
| US liquid gallons (gal) | 0.26417205235814845 |
| Oil barrels (bbl, 42 US gal) | 0.006289810770432106 |
| Cubic inches (in³) | 61.02374409473229 |
| Cubic feet (ft³) | 0.035314666721488586 |
| Cubic yards (yd³) | 0.001307950619314392 |
How to Use This Tool
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 gallon | 3.785411784 liters (definition) |
| Industry oil barrel | 42 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