How do I convert gal to mm³?

Use the formula shown above or enter a value to see gal converted to mm³ instantly.

What is the formula for gal to mm³?

The converter calculates mm³ by applying the category-specific conversion factor for Volume.

When should I use gal vs mm³?

gal and mm³ are both part of the Volume category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Volume Converter & Liquid Reference

Convert gal to mm³

Use the live converter below to translate between Gallon (US) (gal) and Cubic Millimeter (mm³). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

gal → mm³

Gallon (US)

gal

Cubic Millimeter

3,785,411.784

mm³

Rounded result (4 decimals max)

Formula

1 gal = 3,785,411.784 mm³

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

Results update as you type. Swap the direction to convert back from mm³ to gal.

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gal to mm³ quick table

Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

Gallon (US) (gal)	Cubic Millimeter (mm³)
0.25 gal	946,352.946 mm³
0.5 gal	1,892,705.892 mm³
1 gal	3,785,411.784 mm³
2 gal	7,570,823.568 mm³
5 gal	18,927,058.92 mm³
10 gal	37,854,117.84 mm³
25 gal	94,635,294.6 mm³
100 gal	378,541,178.4 mm³