A cubic inch is the volume of a one-inch cube.
Cubic inches to Milliliters Converter — in3 to mL
Convert Cubic inch (in3) to Milliliter (mL) using the exact conversion factor (1 cubic inch = 16.387064 milliliter). See the formula, worked examples, conversion table, history, and common uses.
Cubic inches to Milliliters converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
Milliliter is 0.001 liter units.
Result = input x 1.6387064e-5 / 1e-6.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic inches to Milliliters
Cubic inch and Milliliter appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Specifically: A cubic inch is the volume of a one-inch cube, and milliliter is 0.001 liter units.
Formula
milliliters = cubic inches × 16.387064
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic inch equals 0.000016387064 base units, and 1 milliliter equals 0.000001 base units, so dividing one by the other gives the direct cubic inch-to-milliliter factor of 16.387064.
Simple example
1 in3 × 16.387064 = 16.387064 mL
1 cubic inch = 16.387064 milliliters.
Real-world example
10 in3 × 16.387064 = 163.87064 mL
10 cubic inches = 163.87064 milliliters.
Conversion table
| Cubic inch (in3) | Milliliter (mL) |
|---|---|
| 1 in3 | 16.387064 mL |
| 5 in3 | 81.93532 mL |
| 10 in3 | 163.87064 mL |
| 25 in3 | 409.6766 mL |
| 50 in3 | 819.3532 mL |
| 100 in3 | 1,638.7064 mL |
Reverse conversion: Milliliter to Cubic inch
16.387064 mL × 0.06102374409 = 1 in3
16.387064 milliliters = 1 cubic inch.
cubic inches = milliliters × 0.0610237440947
For a page dedicated to this direction, see Milliliter to Cubic inch.
Understanding the Cubic inch (in3)
A cubic inch is the volume of a one-inch cube.
Understanding the Milliliter
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small-volume unit worldwide
Uses of the Milliliter today
- Medicine dosing (worldwide, including in the US)
- Cooking and recipe measurement outside the US
- Beverage and small-container labeling
History of the Milliliter
The milliliter follows directly from the liter via the 'milli-' SI prefix. It is notable as one of the few metric units in routine US use, since medicine dosing (syringes, liquid medication) is specified in milliliters even in the US.
Historical origin. Milliliter was not the invention of a single named person; it developed through the process described above.
Milliliter — sources
- BIPM SI Brochure — SI prefixes — Defines 'milli-' as the prefix for 10⁻³.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milliliters are in 1 cubic inch?
1 cubic inch equals 16.387064 milliliters, using the exact defined conversion factor rather than an estimate.
How do I convert cubic inch to milliliter?
Multiply the cubic inch value by 16.387064. The converter above does this instantly to whatever precision you set.
How do I convert milliliter back to cubic inch?
Use the reverse factor: 1 milliliter equals 0.0610237441 cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic inch?
Cubic inch (in3) is a unit of volume.
What is a milliliter?
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
Is the cubic inch to milliliter conversion exact?
Yes. Both cubic inch and milliliter are defined by fixed standards rather than physical artifacts, so the factor of 16.387064 used above is exact to as many digits as you choose to display.