What is being measured?
Volume describes a three-dimensional extent or a quantity of liquid under a specified volume convention. US and imperial liquid measures can have different definitions.
Cups, pints, quarts, tablespoons and teaspoons use US customary liquid measures. Imperial gallons are separate. These are volume conversions; ingredient mass also depends on density.
Meaning of in³
cubic inches uses the symbol in³ in this library and measures volume. Under the stated reference convention, 1 in³ = approximately 0.000016387064 m³. This equivalence changes how a known value is written. It does not increase measurement accuracy or establish whether a measurement is appropriate to a real application.
Conversion method
Multiply the value by the source factor (0.000016387064), then divide by the target factor (1). The factor ratio expresses the same volume measurement in the other unit.
Worked example
For a known value of 10 in³, the reference conversion gives 0.00016387064 m³. Converting that result back gives approximately 10 in³. This reverse check helps catch a reversed factor, but matching round-trip arithmetic alone does not independently verify a source definition.
Common reference values
| Input (in³) | Reference equivalent (m³) |
|---|---|
| 1 | 0.000016387064 |
| 5 | 0.00008193532 |
| 10 | 0.00016387064 |
| 25 | 0.0004096766 |
| 50 | 0.0008193532 |
| 100 | 0.0016387064 |
Compare one in³ with other units
| Target unit | Equivalent of 1 in³ | Definition guide |
|---|---|---|
| Cubic metres (m³) | 0.000016387064 | Read definition |
| Litres (L) | 0.016387064 | Read definition |
| Millilitres (mL) | 16.387064 | Read definition |
| US liquid gallons (US gal) | 0.004329004329 | Read definition |
| Cubic feet (ft³) | 0.000578703703704 | Read definition |
| cubic yards (yd³) | 0.0000214334705075 | Read definition |
| imperial gallons (imp gal) | 0.00360465014991 | Read definition |
| US customary cups (US cup) | 0.0692640692641 | Read definition |
Precision and common mistakes
- Keep the source and target quantity consistent. A matching symbol is not enough to establish a compatible definition.
- Record the original measurement precision. Showing twelve significant digits in a table does not make a rounded input more precise.
- Check symbol capitalization, prefixes and any regional convention in the source. Use the displayed unit definition rather than a similarly named unit.
- Factors involving repeating fractions or π use finite numerical precision. Round the final answer to the precision justified by your input.
Use a working converter
- Volume converter
- Cubic inches to Millilitres converter
- Cubic inches to Litres converter
- Cubic inches to Cubic metres converter
- Cubic inches to cubic centimeters converter
- Cubic inches to Cubic feet converter
Source and verification scope
Examples and tables are computed from the versioned unit definitions used by the linked converters. The source access dates appear below. Computandum is independent of the cited organizations; a citation does not mean that a publisher endorses this page or an actual project.
Sources
- NIST / BIPM: NIST: unit conversion factors ↗ · 2026-10-08