Convert fluid ounces to cubic centimeters instantly. Free calculator with full reference chart, nursing I&O guide, and real-world examples — precise to 4 decimal places, zero registration required.
Quick Answer: 1 US fluid ounce = 29.5735 cc (cubic centimeters). Since 1 cc = 1 mL exactly, the oz to cc conversion is identical to oz to mL. Multiply any fl oz value by 29.5735 to get cc. Common values: 1 oz = 29.57 cc · 4 oz = 118.29 cc · 8 oz = 236.59 cc · 16 oz = 473.18 cc · 32 oz = 946.35 cc.
Formula: cc = fl oz × 29.5735 (NIST exact value: 29.5735295625)
cc = fl oz × 29.5735295625
fl oz = cc ÷ 29.5735295625
One US fluid ounce is defined as exactly 29.5735295625 milliliters by the international agreement between the US and the metric system. Because 1 cc (cubic centimeter) equals 1 mL by definition, the conversion factor is identical for both units. In clinical settings, the value is typically rounded to 30 cc per fl oz for quick mental calculations — close enough for bedside nursing estimates, but the calculator above uses the full 4-decimal precision needed for pharmacy, lab, and food science applications.
This chart covers the most commonly needed fl oz to cc values — from fractional ounces used in medicine and cooking to large volumes used in food production and clinical fluid tracking. The mL column is included as a reminder that cc and mL are always identical.
| Fluid Ounces (fl oz) | Cubic Centimeters (cc) | mL (same) | Common Reference |
|---|---|---|---|
| ⅛ fl oz | 3.697 cc | 3.697 mL | small dropper dose |
| ¼ fl oz | 7.393 cc | 7.393 mL | — |
| ½ fl oz | 14.787 cc | 14.787 mL | — |
| ¾ fl oz | 22.180 cc | 22.180 mL | — |
| 1 fl oz | 29.574 cc | 29.574 mL | 2 tablespoons |
| 2 fl oz | 59.147 cc | 59.147 mL | ¼ cup |
| 4 fl oz | 118.294 cc | 118.294 mL | ½ cup |
| 8 fl oz | 236.588 cc | 236.588 mL | 1 cup |
| 10 fl oz | 295.735 cc | 295.735 mL | — |
| 12 fl oz | 354.882 cc | 354.882 mL | soda can |
| 16 fl oz | 473.176 cc | 473.176 mL | 1 pint |
| 20 fl oz | 591.471 cc | 591.471 mL | large bottle |
| 24 fl oz | 709.765 cc | 709.765 mL | sport bottle |
| 32 fl oz | 946.353 cc | 946.353 mL | 1 quart |
| 40 fl oz | 1182.941 cc | 1182.941 mL | — |
| 50 fl oz | 1478.676 cc | 1478.676 mL | — |
| 60 fl oz | 1774.412 cc | 1774.412 mL | — |
| 64 fl oz | 1892.706 cc | 1892.706 mL | ½ gallon |
| 80 fl oz | 2365.882 cc | 2365.882 mL | — |
| 100 fl oz | 2957.353 cc | 2957.353 mL | — |
| 128 fl oz | 3785.412 cc | 3785.412 mL | 1 gallon |
Yes — 1 cc (cubic centimeter) and 1 mL (milliliter) are exactly equal. Both measure volume. The cubic centimeter is a geometric unit: a cube 1 cm on each side. The milliliter is one-thousandth of a liter. The two definitions converge to the same volume because the liter was originally defined as the volume of a 10 cm × 10 cm × 10 cm cube (1,000 cc), making 1 cc = 1/1000 liter = 1 mL.
In practice, cc is preferred in clinical and medical settings — syringes, IV bags, intake/output charts — while mL is used in chemistry, food science, and consumer labeling. The conversion factor to fluid ounces is identical for both: 1 fl oz = 29.5735 cc = 29.5735 mL.
| Term | Abbreviation | Field Used | Equal to 1 fl oz |
|---|---|---|---|
| Cubic centimeter | cc or cm³ | Medicine, nursing, surgery | 29.5735 cc |
| Milliliter | mL or ml | Chemistry, food, consumer labels | 29.5735 mL |
| US fluid ounce | fl oz | US recipes, beverages, retail | 1 fl oz |
Healthcare providers — nurses, CNAs, and clinical staff — routinely convert between fluid ounces and cc when recording patient fluid intake and output (I&O). US beverages and food are labeled in fl oz while clinical documentation uses cc. The standard rounding rule in most facilities is 1 fl oz ≈ 30 cc for fast mental calculation at the bedside.
The table below shows the standard nursing conversion values used on intake-and-output worksheets and the equivalent cup fractions for reference:
| Container / Serving | Volume (fl oz) | Clinical CC Value | Nursing Standard |
|---|---|---|---|
| Small juice cup | 4 fl oz | 120 cc | standard hospital serving |
| Coffee cup | 6 fl oz | 180 cc | standard hospital serving |
| Water cup / glass | 8 fl oz | 240 cc | standard US cup |
| Milk carton (small) | 8 fl oz | 240 cc | standard hospital tray |
| Soup bowl | 6 fl oz | 180 cc | standard hospital serving |
| Jello / pudding cup | 4 fl oz | 120 cc | counted as liquid |
| Water pitcher (full) | 32 fl oz | 960 cc | bedside pitcher |
| IV bag (small) | ~3.4 fl oz | 100 cc | 100 mL piggyback |
| IV bag (standard) | ~33.8 fl oz | 1000 cc | 1 liter NS or D5W |
Clinical shortcut: For nursing intake/output charting, use 30 cc per fl oz when speed matters — this introduces less than 1.4% error compared to the exact 29.5735 value. For pharmacy calculations, IV rate settings, and weight-based dosing, always use the precise factor. A common memory aid: "8 oz of water = 240 cc" — one cup equals 240 cc is the most used single conversion in hospital settings.
Medical records, scientific equipment, and imported products often list volumes in cc or mL. This table converts those values back to fluid ounces — including the specific clinical volumes asked about most often. For instance, 240 cc is exactly 8.115 fl oz (the US legal cup), 260 cc is approximately 8.79 fl oz, and 280 cc equals approximately 9.47 fl oz. For the large implant and surgical volume range, 822 cc converts to roughly 27.8 fl oz and 1000 cc equals exactly 33.814 fl oz — slightly more than 4 cups.
| CC / mL | Fluid Ounces (fl oz) | Common Context |
|---|---|---|
| 5 cc | 0.169 fl oz | medicine dose (1 tsp) |
| 10 cc | 0.338 fl oz | small syringe |
| 15 cc | 0.507 fl oz | 1 tablespoon |
| 20 cc | 0.676 fl oz | small IV push |
| 30 cc | 1.014 fl oz | ≈ 1 fl oz (clinical approx.) |
| 60 cc | 2.029 fl oz | 2 fl oz syringe |
| 100 cc | 3.381 fl oz | 100 mL IV piggyback |
| 120 cc | 4.058 fl oz | 4 oz hospital juice cup |
| 180 cc | 6.087 fl oz | 6 oz coffee / soup |
| 240 cc | 8.115 fl oz | US legal cup / 8 oz glass |
| 260 cc | 8.792 fl oz | — |
| 280 cc | 9.468 fl oz | — |
| 355 cc | 12.007 fl oz | standard 12 oz can |
| 500 cc | 16.907 fl oz | standard water bottle (500 mL) |
| 750 cc | 25.361 fl oz | wine bottle |
| 822 cc | 27.795 fl oz | surgical / implant range |
| 1000 cc | 33.814 fl oz | 1 liter IV bag |
Knowing the oz to cc conversion is useful across a wide range of contexts. The table below groups the most practical scenarios by field:
| Use Case | Fl Oz | CC / mL | Field |
|---|---|---|---|
| Medication oral dose (liquid) | 0.169 fl oz | 5 cc | Medicine / Pharmacy |
| Vaccine dose (typical) | 0.034 fl oz | 1 cc | Medicine |
| IV bag (standard NS or D5W) | 33.81 fl oz | 1000 cc | Nursing / Hospital |
| Patient fluid intake (1 meal tray) | ~24 fl oz | ~720 cc | Nursing I&O |
| Espresso shot | 1 fl oz | 29.57 cc | Food / Beverage |
| Wine pour (standard) | 5 fl oz | 147.87 cc | Food / Beverage |
| Engine oil (small top-up) | 4 fl oz | 118.29 cc | Automotive |
| Perfume bottle (large) | 3.4 fl oz | 100 cc | Cosmetics |
| Ink cartridge (printer) | 0.34 fl oz | 10 cc | Technology |
| Recipe: heavy cream (whipping) | 16 fl oz | 473.18 cc | Cooking / Baking |
Which is larger — a cc or a fluid ounce? A fluid ounce is significantly larger. One fl oz holds nearly 30 cc of volume. Put another way, you would need to fill a 1 cc syringe approximately 30 times to equal 1 fl oz. For quick reference: cc is always the smaller unit; fl oz is always the larger.
❌ Using 28 or 28.35 instead of 29.5735
28.35 is the number of grams in a weight ounce (avoirdupois oz), not cc in a fluid ounce. These are different units entirely. The correct cc-per-fl-oz value is 29.5735. Mixing the two is an easy error when searching for "oz to cc" because weight and volume ounces share an abbreviation.
❌ Treating 30 cc = 1 fl oz as exact
The clinical rounding of 30 cc per fl oz introduces a 1.44% error. Over a 24-hour fluid intake chart for a patient drinking 2,000 cc, this rounding adds up to about 29 cc of discrepancy. Fine for bedside estimates — not acceptable for precise IV calculations or pharmacy compounding.
❌ Confusing cc with cubic inches
1 cubic inch (in³) = 16.387 cc — a very different volume from 1 cc. Engine displacement figures are often listed in cubic inches or cubic centimeters depending on the country. When converting engine specs, verify whether the source uses cc or in³ before applying the fl oz conversion.
The precise equivalence of 29.5735295625 mL per US fluid ounce originates from the 1959 international yard and pound agreement, with the current authoritative definition maintained in the NIST Handbook 44. For the history of why cc and mL are equal — and why both terms persist in different fields — Encyclopædia Britannica's cubic centimetre article traces the metrological convergence. Practical water volume data in cc, mL, and fl oz is available through the USGS Water Science School.
All the liquid volume converters you need, in one place.
Convert fluid ounces to milliliters — identical result to cc since 1 mL = 1 cc exactly.
Reverse direction — convert milliliters (or cc) back to fluid ounces for US-labeled products.
Convert liters to fluid ounces — useful when working with 1000 cc IV bags or 1L metric volumes.
Convert fluid ounces to US cups — 240 cc equals approximately 1 US cup (8 fl oz).
Convert fluid ounces to gallons — 128 fl oz = 1 gallon = 3,785.41 cc.
Convert fluid ounces to teaspoons — 1 fl oz = 6 tsp = 29.57 cc.