Volume Converter
Instant volume converter. Convert between liters, US gallons, UK gallons, cubic meters, cubic feet, milliliters, and cubic inches. Includes formulas, quick presets, and FAQ.
Full original guide (expanded)
Volume Converter
Convert between liters, gallons (US & UK), cubic meters, cubic feet, milliliters and cubic inches. Type in any field to update all the others.
Gallon standard
Switching this will recalculate gallons from current volume.
Quick presets:
Common volume conversions
| From | To | Multiply by |
|---|---|---|
| liter (L) | m³ | 0.001 |
| m³ | liter | 1000 |
| US gallon | liter | 3.785411784 |
| UK gallon | liter | 4.54609 |
| ft³ | liter | 28.3168466 |
| in³ | liter | 0.016387064 |
How this volume converter works
We use cubic meters (m³) as the internal base unit. Each time you type a value, it is converted to m³ and then to all other units using precise SI factors.
Key relations
- 1 L = 0.001 m³
- 1 mL = 0.000001 m³
- 1 ft³ = 0.028316846592 m³
- 1 in³ = 0.000016387064 m³
- 1 US gal = 0.003785411784 m³
- 1 UK gal = 0.00454609 m³
FAQ
- Why do I see many decimals? For industrial and engineering contexts, exact factors are useful. Round to 2–3 decimals for daily work.
- US vs UK gallons? Pick the right radio button above to switch.
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
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Formula (extracted text)
Key relations 1 L = 0.001 m³ 1 mL = 0.000001 m³ 1 ft³ = 0.028316846592 m³ 1 in³ = 0.000016387064 m³ 1 US gal = 0.003785411784 m³ 1 UK gal = 0.00454609 m³
Variables and units
- No variables provided in audit spec.
Sources (authoritative):
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - NIST — SI units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/metric-si/si-units
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.