Use cc to oz for a cubic-centimeter source and oz to cc for a US fluid-ounce source. Both convert volume, not ounces of mass.
The relationship is 1 US fl oz = 29.5735295625 cc, because 1 cc = 1 mL. The forward form divides; the reverse multiplies.
| cc to oz | oz to cc | |
|---|---|---|
| Default input | 100 cc | 4 US fl oz |
| Primary result | US fl oz, up to 4 decimals | cc, up to 4 decimals |
| Default display | 3.3814 US fl oz | 118.2941 cc |
| Supporting rows | Entered cc, mL, L and imperial fluid ounces | Entered US fl oz, cc, mL, L and US cups |
The imperial row on the cc form uses a separate 28.4130625 cc-per-imperial-fluid-ounce factor. Read that label rather than treating the two ounce standards as interchangeable.
A rounded roundtrip
100 ÷ 29.5735295625 = approximately 3.381402270184 US fl oz. Its four-place display is 3.3814. Feeding that rounded value into the reverse form gives 3.3814 × 29.5735295625 = 99.9999328626375 cc, displayed 99.9999 cc. It does not reconstruct exactly 100 cc.
The defined-factor operations are mathematical inverses; finite arithmetic and rounded display/Copy text can lose information. Keep the original source value when comparing results.
Limits
These forms require nonnegative volumes and reject non-finite derived results. A mass ounce requires a different mass conversion and, when crossing to volume, density. Neither direction establishes a measuring procedure or appropriate use of a substance.
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.