From liters (L)
- Liters to MillilitersL → mL
- Liters to Cubic metersL → m³
- Liters to US liquid gallonsL → gal
- Liters to US customary liquid cupsL → cup
Volume conversion family
Volume unit conversions
Volume is a derived quantity representing three-dimensional space and has dimension L³; its coherent SI unit is the cubic meter (m³).
Five named units
Unit and factor reference
| Unit | Symbol | Factor to base | Relationship | Definition and variant |
|---|---|---|---|---|
| liter | L | 1 | defined | The liter is the U.S. English spelling of litre, a special name for the cubic decimeter: 1 L = 1 dm³ = 0.001 m³. Named variant: Capital L is used to avoid confusion between lower-case l and the numeral 1. The base factor is exactly 1 by the family base-unit choice; the litre-to-cubic-metre relationship is exact. |
| milliliter | mL | 0.001 | exact | A milliliter is one-thousandth of a liter: 1 mL = 0.001 L = 1 cm³ exactly. The decimal-prefix relationship is exact. |
| cubic meter | m³ | 1000 | exact | The cubic meter is the coherent SI unit of volume; 1 m³ = 1000 dm³ = 1000 L exactly. The relationship to the litre base used by this family is exact. |
| US liquid gallon | gal | 3.785411784 | defined | The U.S. liquid gallon is exactly 231 cubic inches, equal to 3.785411784 liters. Named variant: U.S. liquid gallon; not the Imperial gallon (4.54609 L) or U.S. dry gallon. The terminating base factor is exact because the U.S. liquid gallon and international inch are exactly defined. |
| US customary liquid cup | cup | 0.2365882365 | defined | This U.S. customary measuring cup is 8 U.S. fluid ounces, one-half U.S. liquid pint, or one-sixteenth U.S. liquid gallon: exactly 0.2365882365 L. Named variant: U.S. customary liquid measuring cup; not a 250 mL metric cup or the 240 mL U.S. legal nutrition-label cup. The stored factor is the exact terminating value implied by 1 cup = 1/16 U.S. liquid gallon; NIST's ready-reference table rounds it to 237 mL and Appendix B.8 displays fewer digits. |
Every ordered pair
All 20 volume calculators
From milliliters (mL)
From cubic meters (m³)
From us liquid gallons (gal)
From us customary liquid cups (cup)
Evidence and review status
This family is machine-reviewed-pending-human. Automated checks verify structure, factor parity and source references; they do not constitute human or specialist approval.
Family assumptions and limits
- This family converts non-negative volume magnitudes; it does not account for thermal expansion, compressibility, fill level, or measurement uncertainty.
- The gallon is the U.S. liquid gallon, not the U.S. dry gallon or Imperial gallon.
- The cup is the U.S. customary measuring cup equal to 8 U.S. fluid ounces; metric cups and the 240 mL U.S. nutrition-label cup are different variants.
Authoritative references
- The International System of Units (SI), 9th edition, version 4.01; Bureau International des Poids et Mesures; Section 3, Table 7, p. 138 (milli); Section 4, Table 8, p. 140: 1 L = 1 dm³ = 10⁻³ m³.; accessed 2026-08-07
- NIST Handbook 44 (2026), Appendix C: General Tables of Units of Measurement; National Institute of Standards and Technology; Pages C-4, C-6, C-13 to C-16, and C-24 to C-26; litre/cubic-decimetre relationship, U.S. liquid gallon = 231 in³ = 3.785411784 L, and measuring cup = 8 U.S. fluid ounces = one-half liquid pint.; accessed 2026-08-07
- NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically; National Institute of Standards and Technology; Alphabetical entries 'cup (U.S.)' and 'gallon (U.S.)'; factors to litre, used with the exact U.S.-liquid subdivisions in NIST HB 44 Appendix C.; accessed 2026-08-07