A cubic centimeter and a milliliter name the same volume: 1 cm³ = 1 mL. Use cc to mL when your source is cubic centimeters, or mL to cc when your source is milliliters.
What differs
| cc to mL | mL to cc | |
|---|---|---|
| Input | Nonnegative cc; default 100 | Nonnegative mL; default 250 |
| Primary result | mL, up to 3 decimal places | cc, up to 4 decimal places |
| Default result | 100 mL | 250 cc |
| Additional rows | Entered cc, liters, US fluid ounces | Entered mL, cm³, liters, cubic meters |
The first form divides by 1000 for liters and by 29.5735295625 for US fluid ounces. The second divides by 1000 for liters and by 1,000,000 for cubic meters. A 100 cc input therefore gives 100 mL, 0.1 L and approximately 3.3814 US fl oz.
Pick the source label
A measuring cylinder, product specification or engine-displacement value may use either label. The numeric volume is unchanged, so this pair chiefly helps match a required unit label and exposes different supporting rows.
Limits
The identity does not depend on material density. Density becomes necessary when the task changes from volume to mass. These forms do not perform that task. Their displayed and copied values are rounded: the same underlying volume can appear with fewer decimal digits, and the additional US fluid-ounce row uses a different scale.
Sources
NIST SP 811, unit definitions and Appendix B factors. The paired calculator controls and rounding described above are their current form behavior. NIST Handbook 44, Appendix C, customary unit relationships.