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Cubic Inches to US Gallons Converter

Convert cubic inches (in³) to US gallons (gal), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter a volume, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
0.004329004329 gal
US liquid quarts
0.017316017316 qt
US liquid pints
0.034632034632 pt
US cups
0.0692640692641 cup
US fluid ounces
0.554112554113 fl oz
US tablespoons
1.10822510823 tbsp
US teaspoons
3.32467532468 tsp
cubic miles
3.93146572925 × 10⁻¹⁵ mi³
cubic yards
2.14334705075 × 10⁻⁵ cu yd
cubic feet
0.000578703703704 cu ft
cubic kilometers
1.6387064 × 10⁻¹⁴ km³
cubic meters
1.6387064 × 10⁻⁵ m³
liters
0.016387064 L
milliliters
16.387064 mL
cubic centimeters
16.387064 cm³
cubic millimeters
16,387.064 mm³
imperial gallons
0.00360465014991 imp gal
imperial quarts
0.0144186005996 imp qt
imperial pints
0.0288372011993 imp pt
imperial fluid ounces
0.576744023985 imp fl oz
imperial tablespoons
0.922790438377 imp tbsp
imperial teaspoons
2.76837131513 imp tsp
drops
327.74128 gtt

1 in³ = 0.004329004329 gal

Show the working
  1. 1 in³ = 0.004329004329 gal
  2. 1 × 0.004329004329 = 0.004329004329 gal

How to convert cubic inches to us gallons

1 gal = 231 in³, so divide by 231 to go from cubic inches to US gallons (1 in³ = 0.004329004329 gal).

gal = in³ ÷ 231
in³ = gal × 231

Worked example:

1 in³ = 0.004329004329 gal
5 × 0.004329004329 = 0.021645021645 gal

Cubic Inches to us gallons table

Cubic InchesUS Gallons
1 in³0.004329004329 gal
2 in³0.00865800865801 gal
3 in³0.012987012987 gal
4 in³0.017316017316 gal
5 in³0.021645021645 gal
6 in³0.025974025974 gal
7 in³0.030303030303 gal
8 in³0.034632034632 gal
9 in³0.038961038961 gal
10 in³0.04329004329 gal
15 in³0.0649350649351 gal
20 in³0.0865800865801 gal
25 in³0.108225108225 gal
30 in³0.12987012987 gal
40 in³0.17316017316 gal
50 in³0.21645021645 gal
75 in³0.324675324675 gal
100 in³0.4329004329 gal
250 in³1.08225108225 gal
500 in³2.1645021645 gal
1000 in³4.329004329 gal

About the units

Cubic Inches (in³)
Cubic inches, a US customary unit. Definition: NIST Handbook 44 (2024), Appendix C: General Tables of Units of Measurement.
US Gallons (gal)
US gallons, a US customary unit. Definition: NIST Handbook 44 Appendix C (US customary units; US gallon = 231 in³).

Formula version 0.1.0Reviewed