{"success":true,"version":"v1","request":{"tool":"get_calculator_schema","calculator_id":"volume"},"result":{"entity_type":"calculator","id":"volume","calculator_id":"volume","canonical_url":"https://tttkmbb.com/conversion/volume","name":"Volume Converter","title":"Volume Converter – Litres, Millilitres, Cubic Metres, US and Imperial Gallons, Cups, Cubic Feet","category":"conversion","category_name":"Unit Conversion","tool_name":"convert_volume","featured_mcp_tool":false,"description":"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).","use_when":"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 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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.","example":"gal_us"},{"name":"to_unit","label":"To unit","type":"enum","required":true,"values":[{"value":"mL","label":"Millilitre (mL)","aliases":["millilitre","milliliter","millilitres","milliliters"]},{"value":"L","label":"Litre (L)","aliases":["litre","liter","litres","liters","ltr"]},{"value":"m3","label":"Cubic metre (m³)","aliases":["m^3","m³","cubic metre","cubic-metre","cubicmetre","cubic·metre","cubic_metre","cubic meter","cubic-meter","cubicmeter","cubic·meter","cubic_meter","cubic metres","cubic-metres","cubicmetres","cubic·metres","cubic_metres","cubic meters","cubic-meters","cubicmeters","cubic·meters","cubic_meters","cu m","cu-m","cum","cu·m","cu_m","cbm"]},{"value":"cm3","label":"Cubic centimetre 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(fl_oz_us)","aliases":["fl-oz-us","fl oz us","flozus","fl·oz·us","us fluid ounce","us-fluid-ounce","usfluidounce","us·fluid·ounce","us_fluid_ounce","fl oz","fl-oz","floz","fl·oz","fl_oz","fluid ounce","fluid-ounce","fluidounce","fluid·ounce","fluid_ounce","fluid ounces","fluid-ounces","fluidounces","fluid·ounces","fluid_ounces","us fl oz","us-fl-oz","usfloz","us·fl·oz","us_fl_oz","us fluid ounces","us-fluid-ounces","usfluidounces","us·fluid·ounces","us_fluid_ounces","fl. oz"]},{"value":"cup_us","label":"US cup (cup_us)","aliases":["cup-us","cup us","cupus","cup·us","us cup","us-cup","uscup","us·cup","us_cup","cup","cups","us cups","us-cups","uscups","us·cups","us_cups","cup (us)","cup-(us)","cup(us)","cup·(us)","cup_(us)"]},{"value":"pint_us","label":"US pint (pint_us)","aliases":["pint-us","pint us","pintus","pint·us","us pint","us-pint","uspint","us·pint","us_pint","pint","pints","pt","us pints","us-pints","uspints","us·pints","us_pints","liquid 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for very small or very large values)."},{"name":"result_text","label":"Conversion","type":"string","decimals":4,"description":"The conversion as text with 6 significant figures, e.g. \"5 mi = 8.04672 km\"."},{"name":"formula","label":"Unit relation","type":"string","decimals":4,"description":"Relation used, e.g. \"1 mi = 1.609344 km\"."},{"name":"factor","label":"Factor","type":"number","decimals":12,"description":"Multiplier from from_unit to to_unit (result = value × factor); absent for non-linear conversions."},{"name":"conversion_table","label":"Conversion table","type":"object","decimals":12,"description":"The input value expressed in every supported volume unit (6 significant figures), keyed by unit symbol."}],"input_schema":{"type":"object","properties":{"value":{"description":"Amount to convert, expressed in from_unit.","type":"number","examples":[1]},"from_unit":{"description":"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.","type":"string","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"],"examples":["gal_us"]},"to_unit":{"description":"Unit to convert into (same symbols as from_unit).","type":"string","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"],"examples":["L"]}},"additionalProperties":false,"required":["value","from_unit","to_unit"]},"output_schema":{"type":"object","properties":{"result":{"description":"Converted value expressed in to_unit (rounded to 6 decimals; see result_text for very small or very large values).","type":"number"},"result_text":{"description":"The conversion as text with 6 significant figures, e.g. \"5 mi = 8.04672 km\".","type":"string"},"formula":{"description":"Relation used, e.g. \"1 mi = 1.609344 km\".","type":"string"},"factor":{"description":"Multiplier from from_unit to to_unit (result = value × factor); absent for non-linear conversions.","type":"number"},"conversion_table":{"description":"The input value expressed in every supported volume unit (6 significant figures), keyed by unit symbol.","type":"object"}}},"formula":"result = value × factor, factor = (1 from_unit in L) / (1 to_unit in L)","sources":[{"name":"NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors","url":"https://www.nist.gov/pml/special-publication-811","type":"standard","retrieved_at":"2026-09-23"},{"name":"BIPM – The International System of Units (SI Brochure, 9th edition)","url":"https://www.bipm.org/en/publications/si-brochure","type":"standard","retrieved_at":"2026-09-23"},{"name":"Wikipedia – Conversion of units","url":"https://en.wikipedia.org/wiki/Conversion_of_units","type":"reference","retrieved_at":"2026-09-23"}],"freshness":{"type":"static","max_age_seconds":null,"note":"Deterministic formula with fixed constants; results never go stale. Inputs supplied by the caller determine the output."},"examples":[{"name":"1 US gallon to litres","inputs":{"value":1,"from_unit":"gal_us","to_unit":"L"},"expected":{"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}},"url":"https://tttkmbb.com/api/v1/calculate/volume?value=1&from_unit=gal_us&to_unit=L"},{"name":"500 mL to US cups","inputs":{"value":500,"from_unit":"mL","to_unit":"cup_us"},"expected":{"result":2.113376,"conversion_table":{"fl_oz_us":16.907,"L":0.5}},"url":"https://tttkmbb.com/api/v1/calculate/volume?value=500&from_unit=mL&to_unit=cup_us"}],"faq":[{"q":"US or imperial gallon?","a":"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)."},{"q":"Is a millilitre the same as a cubic centimetre?","a":"Yes, exactly: 1 mL = 1 cm³ = 1 cc, and 1 L = 1 dm³ = 0.001 m³."},{"q":"Which barrel is bbl?","a":"The US oil barrel of 42 US gallons (158.987294928 L). Beer and other barrels differ."}],"tags":["volume converter","gallons to liters","cubic feet to cubic meters","ml to cups","fluid ounces"],"related":[{"calculator_id":"cooking-measurements","reason":"Kitchen-only subset with teaspoons, tablespoons and cups."},{"calculator_id":"cylinder","reason":"Compute tank volume from dimensions."},{"calculator_id":"density","reason":"Convert volume to mass with a density."}],"links":{"html":"https://tttkmbb.com/conversion/volume","markdown":"https://tttkmbb.com/conversion/volume.md","json":"https://tttkmbb.com/conversion/volume.json","api":"https://tttkmbb.com/api/v1/calculate/volume","schema":"https://tttkmbb.com/api/v1/calculators/volume","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp"},"version":"v1","updated_at":"2026-09-23"},"timestamp":"2026-09-23T23:23:02Z"}