Oz to cc Converter
Convert fluid ounces to cubic centimeters. Enter US or UK imperial fluid ounces to get cc (which equals mL) and teaspoons — one US fluid ounce is 29.5735 cc.
Example: with Fluid ounces 1 · Fluid ounce type US fluid ounce (29.5735 mL) → Volume in cc: 29.57 cc.
- Same volume in mL29.57 mL
- US teaspoons6.00 tsp
Computed by the calculator below using its default values. Change any input to see your own numbers.
cc = fl oz × 29.5735 (US) or × 28.4131 (UK). A cc equals a mL, so the cc and mL rows are identical; this converts fluid volume, not weight.
How many cc are in an ounce
One US fluid ounce is 29.5735 cubic centimeters, and since a cubic centimeter equals a milliliter, that is the same 29.5735 mL you see on medicine cups and syringes. Multiply your ounces by that factor to get cc. Eight fluid ounces — a common cup — comes to about 236.6 cc.
If your source uses UK imperial ounces, the factor is a bit smaller at 28.4131 cc per ounce, because the imperial fluid ounce is defined differently. The two systems disagree by roughly 4 percent, so a recipe or dosing instruction from the UK converts slightly lower than a US one. Always confirm which ounce your label means, especially for medicine.
How it’s calculated
cc = fluid ounces × 29.5735295625 (US) or × 28.4130625 (UK imperial); cc equals mL exactly. Teaspoons use 1 US tsp = 4.92892 mL.
Converts fluid volume only. A fluid ounce measures volume, distinct from the weight ounce on a scale — those require the liquid's density to relate.
US fluid ounces to cc
| Fluid ounces | cc (mL) | US teaspoons |
|---|---|---|
| 0.5 oz | 14.79 cc | 3.00 tsp |
| 1 oz | 29.57 cc | 6.00 tsp |
| 2 oz | 59.15 cc | 12.00 tsp |
| 8 oz | 236.59 cc | 48.00 tsp |
| 16 oz | 473.18 cc | 96.00 tsp |
Computed with US fl oz = 29.5735 mL, cc = mL, tsp = 4.92892 mL.
Common mistakes
- Mixing US and UK fluid ounces, which differ by about 4 percent.
- Treating fluid ounces (volume) as weight ounces on a scale.
- Forgetting cc and mL are the same, and hunting for a nonexistent second conversion.
- Rounding early on small medical volumes where hundredths of a cc matter.
Frequently asked questions
How many cc are in one ounce?
One US fluid ounce is 29.5735 cc, which equals 29.5735 mL. A UK imperial fluid ounce is 28.4131 cc. Multiply your ounce value by the matching factor.
How do I convert ounces to cc?
Multiply fluid ounces by 29.5735 for US or 28.4131 for UK. For example, 8 US fluid ounces is 8 × 29.5735 = about 236.6 cc.
Is cc the same as mL for this?
Yes. A cubic centimeter equals a milliliter, so once you convert ounces to cc you already have the milliliters — no further step.
Does this convert weight ounces?
No. This is fluid ounces to volume in cc. Weight ounces need the liquid's density, because equal volumes of different liquids weigh different amounts.