Cubic Feet to Gallons Converter

Convert cubic feet to gallons instantly. Supports US liquid gallons, US dry gallons, and UK/Imperial gallons. Includes reverse gallons to cubic feet, formulas, and handy tables for water, tanks, and irrigation.

Full original guide (expanded)

Cubic Feet to Gallons Converter

Convert volume from cubic feet to gallons quickly. Select US liquid, US dry, or UK/Imperial gallons and see cubic meters and liters at the same time. Ideal for water utilities, tank sizing, pools, irrigation, and plumbing.

Gallons: 7.480519 gal

Liters: 28.316846 L

Cubic meters: 0.0283168 m³

Using 1 ft³ = 7.480519 US gal

Quick table: cubic feet → US gallons

ft³ US gal
17.4805
214.9610
537.4026
1074.8052
20149.6104

Formulas

1 ft³ = 7.480519 US gal (liquid)

1 ft³ = 6.228835 UK gal

1 ft³ = 6.427010 US dry gal

1 ft³ = 28.3168466 L

General formula: gallons = ft³ × factor and ft³ = gallons ÷ factor

Which gallon should I pick?

  • US gallon (liquid): water, plumbing, pools, US utility bills.
  • US gallon (dry): older agricultural/crop references.
  • UK/Imperial gallon: UK, some Commonwealth, older engineering texts.

FAQ

1. How many gallons of water in a 2 ft × 2 ft × 2 ft cube?

Its volume is 8 ft³. 8 × 7.480519 ≈ 59.844 gallons (US liquid).

2. Why do some sites show slightly different numbers?

Roundings. Our figures use the NIST exact factors (231 in³ per US gallon, 1 ft = 0.3048 m → 1 ft³ = 0.0283168466 m³).

3. Can I use this for water utility calculations?

Yes—many utilities meter in cubic feet (or CCF = 100 ft³) and customers think in gallons. This tool shows the exact multiplier.

Full original guide (expanded)

Add here long-form explanation for SEO: how to convert ft³ to gallons by hand, how to estimate pool volume, and how to check against the water bill (1 CCF = 748.0519 US gal).

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\\]
','\
Formula (extracted text)
1 ft³ = 7.480519 US gal (liquid) 1 ft³ = 6.228835 UK gal 1 ft³ = 6.427010 US dry gal 1 ft³ = 28.3168466 L General formula: gallons = ft³ × factor and ft³ = gallons ÷ factor
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
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.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn
Formulas

(Formulas preserved from original page content, if present.)

Version 0.1.0-draft
Citations

Add authoritative sources relevant to this calculator (standards bodies, manuals, official docs).

Changelog
  • 0.1.0-draft — 2026-01-19: Initial draft (review required).