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Volume Converter
Converts volumes between metric units (mL, L, cm³, m³), US customary units (tsp to gallon, in³, ft³, yd³, oil barrel), imperial units (fl oz, pint, quart, gallon) and metric kitchen units, with exact definitions (1 US gal = 3.785411784 L, 1 imperial gal = 4.54609 L).
When to use
You need a liquid or bulk volume in another unit, e.g. gallons to litres, cubic feet to cubic metres or millilitres to cups.
Do not use when: You need a volume from dimensions (use cylinder, sphere or rectangular-prism), a recipe conversion with tablespoons and cups only (cooking-measurements is a focused subset), or mass from volume (use density).
Formula
result = value × factor, factor = (1 from_unit in L) / (1 to_unit in L)
Inputs
| Parameter | Type | Unit | Required | Description |
|---|---|---|---|---|
value | number | yes | Amount to convert, expressed in from_unit. | |
from_unit | enum: mL | L | m3 | cm3 | tsp | tbsp | fl_oz_us | cup_us | pint_us | quart_us | gal_us | fl_oz_uk | pint_uk | quart_uk | gal_uk | in3 | ft3 | yd3 | bbl | tsp_metric | tbsp_metric | cup_metric | yes | Unit of the input value. Accepted symbols: mL, L, m3, cm3, tsp, tbsp, fl_oz_us, cup_us, pint_us, quart_us, gal_us, fl_oz_uk, pint_uk, quart_uk, gal_uk, in3, ft3, yd3, bbl, tsp_metric, tbsp_metric, cup_metric; spelled-out names and common abbreviations are accepted too. | |
to_unit | enum: mL | L | m3 | cm3 | tsp | tbsp | fl_oz_us | cup_us | pint_us | quart_us | gal_us | fl_oz_uk | pint_uk | quart_uk | gal_uk | in3 | ft3 | yd3 | bbl | tsp_metric | tbsp_metric | cup_metric | yes | Unit to convert into (same symbols as from_unit). |
Outputs
| Output | Type | Unit | Description |
|---|---|---|---|
result | number | Converted value expressed in to_unit (rounded to 6 decimals; see result_text for very small or very large values). | |
result_text | string | The conversion as text with 6 significant figures, e.g. "5 mi = 8.04672 km". | |
formula | string | Relation used, e.g. "1 mi = 1.609344 km". | |
factor | number | Multiplier from from_unit to to_unit (result = value × factor); absent for non-linear conversions. | |
conversion_table | object | The input value expressed in every supported volume unit (6 significant figures), keyed by unit symbol. |
Example
1 US gallon to litres: {"value":1,"from_unit":"gal_us","to_unit":"L"} → {"result":3.785412,"factor":3.785411784,"formula":"1 gal_us = 3.785411784 L","conversion_table":{"mL":3785.41,"fl_oz_us":128,"gal_uk":0.832674}}
500 mL to US cups: {"value":500,"from_unit":"mL","to_unit":"cup_us"} → {"result":2.113376,"conversion_table":{"fl_oz_us":16.907,"L":0.5}}
GET https://tttkmbb.com/api/v1/calculate/volume?value=1&from_unit=gal_us&to_unit=L
Machine access
- API:
GET https://tttkmbb.com/api/v1/calculate/volume(query parameters) orPOSTwith a JSON body{"inputs": {...}} - Schema: https://tttkmbb.com/api/v1/calculators/volume · Markdown: https://tttkmbb.com/conversion/volume.md · JSON definition: https://tttkmbb.com/conversion/volume.json
- MCP: server
https://tttkmbb.com/mcp, toolrun_calculator with calculator_id="volume" - OpenAPI operationId:
convert_volume - Freshness:
static. Authentication: none. Rate limit: fair use (see rate limits).
Sources
FAQ
US or imperial gallon?
The plain aliases gal, gallon, pint, quart, fl oz and cup resolve to US customary units; imperial units are gal_uk, pint_uk, quart_uk and fl_oz_uk (an imperial gallon is about 20% larger).
Is a millilitre the same as a cubic centimetre?
Yes, exactly: 1 mL = 1 cm³ = 1 cc, and 1 L = 1 dm³ = 0.001 m³.
Which barrel is bbl?
The US oil barrel of 42 US gallons (158.987294928 L). Beer and other barrels differ.
Related calculators
- Cooking Measurement Converter — Kitchen-only subset with teaspoons, tablespoons and cups.
- Cylinder Calculator — Compute tank volume from dimensions.
- Density Converter — Convert volume to mass with a density.