Convert cubic centimeters to US fluid ounces in one step. Free calculator with complete reference chart, clinical nursing guide, and real-world examples — accurate to 4 decimal places.
Quick Answer: 1 cc = 0.0338 fl oz. To convert cc to oz, divide by 29.5735. Common values: 30 cc ≈ 1 fl oz · 100 cc = 3.38 fl oz · 240 cc = 8.12 fl oz · 500 cc = 16.91 fl oz · 1000 cc = 33.81 fl oz.
Formula: fl oz = cc ÷ 29.5735 (NIST exact: ÷ 29.5735295625)
fl oz = cc ÷ 29.5735295625
cc = fl oz × 29.5735295625
One US fluid ounce equals exactly 29.5735295625 cc — established by the 1959 international yard and pound agreement. To go from cc to fluid ounces, divide by this factor. Because 1 cc = 1 mL exactly, the formula is the same whether you are converting from cc or mL. For quick mental estimates, dividing by 30 is accurate to within 1.4% and works well for bedside nursing calculations. For pharmacy, lab work, or recipe scaling, always use the full 6-decimal divisor.
This cc to oz conversion chart covers the full practical range — from 1 cc syringe doses to 5,000 cc batch volumes. The mL column is shown as a reminder that cc and mL are always numerically identical. The "fl oz (rounded)" column reflects the ÷30 clinical approximation used in nursing documentation.
| CC / mL | Exact fl oz | fl oz (÷30 approx) | Common Reference |
|---|---|---|---|
| 1 cc | 0.0338 fl oz | 0.033 | small vaccine dose |
| 5 cc | 0.169 fl oz | 0.167 | 1 teaspoon (medicine) |
| 10 cc | 0.338 fl oz | 0.333 | small oral syringe |
| 20 cc | 0.676 fl oz | 0.667 | — |
| 25 cc | 0.845 fl oz | 0.833 | — |
| 30 cc | 1.014 fl oz | 1.000 | ≈ 1 fl oz (clinical) |
| 50 cc | 1.691 fl oz | 1.667 | — |
| 60 cc | 2.029 fl oz | 2.000 | large oral syringe |
| 75 cc | 2.536 fl oz | 2.500 | — |
| 100 cc | 3.381 fl oz | 3.333 | small IV piggyback |
| 120 cc | 4.058 fl oz | 4.000 | 4 oz juice cup |
| 150 cc | 5.072 fl oz | 5.000 | — |
| 180 cc | 6.087 fl oz | 6.000 | 6 oz coffee cup |
| 200 cc | 6.763 fl oz | 6.667 | — |
| 240 cc | 8.115 fl oz | 8.000 | US legal cup / 8 oz glass |
| 250 cc | 8.454 fl oz | 8.333 | metric cup / 250 mL bottle |
| 260 cc | 8.792 fl oz | 8.667 | — |
| 280 cc | 9.468 fl oz | 9.333 | — |
| 300 cc | 10.144 fl oz | 10.000 | — |
| 400 cc | 13.526 fl oz | 13.333 | whipping cream carton |
| 500 cc | 16.907 fl oz | 16.667 | standard water bottle |
| 750 cc | 25.361 fl oz | 25.000 | wine bottle |
| 1000 cc | 33.814 fl oz | 33.333 | 1 liter / IV bag |
A cubic centimeter and a fluid ounce both measure volume — but they are not the same, and the size difference is significant. One fluid ounce is about 30 times larger than one cubic centimeter. Knowing which is larger removes a common source of confusion: if you see "8 cc" on a syringe label, that is less than one-third of a fluid ounce — a very small amount by US kitchen standards.
The difference between cc and oz also explains why the two units serve different contexts. The cc (and its identical twin, the mL) is the preferred unit in science, medicine, and most countries outside the US. The fluid ounce is used in US consumer products, recipes, and retail labeling. When you encounter both in the same context — for example, a US recipe calling for fluid ounces and a foreign ingredient labeled in mL — the conversion factor is always 29.5735 cc per fluid ounce.
| Property | 1 cc (cm³) | 1 fl oz (US) |
|---|---|---|
| Volume | 1 mL | 29.5735 mL |
| Relative size | smaller unit | larger unit (~30× a cc) |
| Primary use | Medicine, science, metric | US recipes, retail, beverages |
| Equivalent in oz | 0.0338 fl oz | 1 fl oz |
| System | Metric (SI) | US Customary |
Is cc the same as a fluid ounce? No. 1 cc = 0.0338 fl oz. They measure the same thing (volume) but at very different scales. A cc is a metric unit; a fluid ounce is a US customary unit. The only time they would be "the same" is if someone mistakenly wrote "cc" when they meant "mL" and then treated 1 mL ≈ 0.0338 fl oz — which is still not equal to 1 fl oz.
In clinical settings, nurses and CNAs convert between fluid ounces and cc constantly during patient intake-and-output (I&O) charting. US hospital meal trays label beverages in fluid ounces; nursing documentation records fluid intake in cc. The standard conversion method taught in nursing programs is to multiply fl oz by 30 for quick estimates or divide cc by 29.5735 for precise documentation.
The most memorized single conversion in clinical practice is 240 cc = 8 fl oz — one standard cup or water glass. From there, the entire meal tray converts quickly: a 4 oz juice cup = 120 cc, a 6 oz coffee cup = 180 cc, an 8 oz milk carton = 240 cc.
| Item | Volume (fl oz) | CC Value (charted) | Notes |
|---|---|---|---|
| Water glass | 8 fl oz | 240 cc | most common reference |
| Juice cup (small) | 4 fl oz | 120 cc | breakfast / lunch tray |
| Coffee cup | 6 fl oz | 180 cc | SCA standard cup |
| Milk carton | 8 fl oz | 240 cc | hospital tray standard |
| Soup bowl | 6 fl oz | 180 cc | counted as liquid intake |
| Jello / ice cream | 4 fl oz | 120 cc | counted when melted |
| IV bag (100 mL) | 3.38 fl oz | 100 cc | piggyback / IVPB |
| IV bag (1 liter) | 33.81 fl oz | 1000 cc | primary line NS/D5W |
| Bedside pitcher | 32 fl oz | 960 cc | full pitcher |
Nursing shortcut: To convert cc to oz for nursing measurements at the bedside, divide by 30 for fast mental math. The error is under 1.5%, which is acceptable for I&O documentation. For IV drip rates, medication volumes, or weight-based dosing calculations, use the precise divisor of 29.5735 or use this calculator.
Large cc volumes appear in surgical contexts, food production, and batch cooking. The table below answers the specific questions about 822 cc, 1000 cc, and larger volumes. A 1000 cc volume equals 1 liter — equivalent to 33.814 fl oz. The 822–1000 cc range appears most often in surgical implant documentation, where 822 cc comes to roughly 27.8 fl oz and the full 1000 cc equals 33.8 fl oz.
| CC / mL | Fluid Ounces | US Equivalent |
|---|---|---|
| 500 cc | 16.907 fl oz | just over 1 pint |
| 750 cc | 25.361 fl oz | wine bottle (750 mL) |
| 822 cc | 27.795 fl oz | surgical range lower end |
| 946 cc | 31.988 fl oz | ≈ 1 quart (946 mL) |
| 1000 cc | 33.814 fl oz | 1 liter / 1L IV bag |
| 1500 cc | 50.721 fl oz | 1.5 liters |
| 2000 cc | 67.628 fl oz | 2 liters / large soda bottle |
| 3000 cc | 101.442 fl oz | 3 liters |
| 5000 cc | 169.070 fl oz | 5 liters / large container |
CC to oz conversions appear across medicine, cooking, cosmetics, and automotive contexts. Here are the most common real-world scenarios along with the correct fluid ounce equivalent:
| Item / Scenario | Volume in CC | Fluid Ounces | Context |
|---|---|---|---|
| Vaccine dose (typical) | 0.5–1 cc | 0.017–0.034 fl oz | Medicine |
| Oral medicine dose | 5 cc | 0.169 fl oz | = 1 teaspoon |
| Espresso shot | 30 cc | 1.014 fl oz | Coffee / Beverage |
| Perfume bottle (travel) | 100 cc | 3.381 fl oz | TSA liquid limit |
| Whipping cream (400 cc) | 400 cc | 13.526 fl oz | Cooking / Baking |
| Standard water bottle | 500 cc | 16.907 fl oz | Beverage |
| Wine bottle | 750 cc | 25.361 fl oz | Beverage |
| IV normal saline bag | 1000 cc | 33.814 fl oz | Hospital / Nursing |
| Engine oil top-up | 250 cc | 8.454 fl oz | Automotive |
| Shampoo bottle (large) | 400 cc | 13.526 fl oz | Personal care |
| Cooking oil bottle | 500 cc | 16.907 fl oz | Kitchen |
| Printer ink cartridge | 10 cc | 0.338 fl oz | Technology |
Whipping cream note: 400 cc of whipping cream equals approximately 13.53 fl oz — just under the standard US pint carton (16 fl oz / 473 cc). Many European and Australian recipes list cream in mL or cc; use this calculator to convert those values before measuring with US measuring cups.
❌ Multiplying by 29.5735 instead of dividing
To go from cc to oz, you divide by 29.5735 — not multiply. Multiplying converts oz to cc (the other direction). A quick check: 30 cc ÷ 29.5735 ≈ 1 fl oz. If your result is in the hundreds after entering 30 cc, you multiplied by mistake.
❌ Using 28.35 as the conversion factor
28.35 is grams per avoirdupois (weight) ounce — a completely different unit from the fluid ounce. Weight ounces measure mass; fluid ounces measure volume. The correct number for converting cubic centimeters to fluid ounces is always 29.5735, not 28.35.
❌ Assuming 30 cc = 1 fl oz for precise calculations
30 cc = 1.014 fl oz — not exactly 1. The 1.4% error compounds over large volumes: a 24-hour I&O record using ÷30 for 3,000 cc of intake will be off by about 43 cc versus the exact calculation. Use ÷30 only for bedside estimates, never for pharmacy or lab calculations.
❌ Treating cc and cubic inches as the same
1 cubic inch (in³) = 16.387 cc — not 1 cc. Engine displacements listed in "cc" are in cubic centimeters; those listed in "ci" are in cubic inches. Applying a cc-to-oz conversion to a cubic inch value gives a completely wrong result.
The exact equivalence of 29.5735295625 mL per US fluid ounce is codified in NIST Handbook 44, the official US reference for weights and measures. The relationship between the cubic centimeter and the milliliter — and why they are numerically equal — is detailed in Encyclopædia Britannica's cubic centimetre entry. For context on water volume and density figures in metric and US customary units, see the USGS Water Science School.
All the liquid volume converters you need, in one place.
Reverse converter — go from fluid ounces to cubic centimeters. 1 fl oz = 29.5735 cc.
Convert milliliters to fluid ounces — identical to cc since 1 mL = 1 cc exactly.
Convert liters to fluid ounces — 1 liter = 1000 cc = 33.814 fl oz.
Convert fluid ounces to milliliters — same result as oz to cc since cc and mL are equal.
Scale up — 1 gallon = 128 fl oz = 3,785.41 cc for large volume calculations.
Convert fluid ounces to cups — 240 cc equals approximately 1 US cup (8 fl oz).