A 16 US fl oz plastic cup holds approximately 473 mL of nominal volume. For a restaurant, café or juice bar, the right size also depends on ice, toppings, lid clearance and the portion you actually serve. A cup's stated capacity is not a promise that a finished drink will fit to the rim without spills.
Use this chart to compare plastic cup sizes in US fluid ounces and milliliters, then test your actual drink recipe before ordering in volume.
Plastic cup sizes chart: ounces to milliliters
These are rounded US volume conversions, not measurements of a particular cup's height or rim diameter. Suggested uses are starting points for menu planning.
| Cup capacity | Approximate volume | Suggested use | Exact product option |
|---|---|---|---|
| 9 US fl oz | 266 mL | Small cold drinks | 9 oz PET cups — 50 pcs |
| 10 US fl oz | 296 mL | Small juices or iced drinks | 10 oz PET cups — 50 pcs |
| 12 US fl oz | 355 mL | Regular cold drinks | 12 oz PET cups — 50 pcs |
| 14 US fl oz | 414 mL | Between regular and large | 14 oz PET cups — 50 pcs |
| 16 US fl oz | 473 mL | Iced coffee or smoothies | 16 oz PET cups — 50 pcs |
| 20 US fl oz | 591 mL | Larger iced drinks | 20 oz PET cups — 50 pcs |
| 24 US fl oz | 710 mL | Large iced drinks | 24 oz PET cups — 50 pcs |
| 32 US fl oz | 946 mL | Extra-large cold drinks | 32 oz PET cups — 500 pcs |
NIST's conversion reference gives approximately 29.57 mL per US fluid ounce. Stock and package options can change; confirm the selected size and pack in your cart.
How big is a 16 oz cup?
Sixteen US fluid ounces is about 473 mL, or two 8-fluid-ounce measuring cups. It describes volume, not shape. Two cups with the same stated capacity can have different dimensions and may require different lids.
For example, a recipe using 12 fluid ounces of liquid leaves about 4 fluid ounces of nominal space in a 16-ounce cup before allowing for ice, foam or toppings. That arithmetic does not prove the assembled drink will fit. Make the complete drink in a sample cup and check the lid clearance.
Small portion cups: match the actual size
For sauces, dressings, dips and snacks, compare the measured portion and the fitted lid. Portion cups are a different buying decision from beverage cups.
| Actual product capacity | Approximate volume | Verified option |
|---|---|---|
| 4 US fl oz | 118 mL | 4 oz portion cups with lids — 36 pcs |
| 5.5 US fl oz | 163 mL | 5.5 oz portion cups with lids — 14 pcs |
A 4-ounce product is not a 3-ounce cup, and a 5.5-ounce product is not a 5- or 7-ounce cup. If your recipe requires a different capacity, verify an exact product instead of substituting by link label.
Five checks before ordering by the case
- Make the real drink. Use your normal recipe, ice scoop, toppings and service temperature. A larger cup can hold more ice without increasing the liquid portion.
- Confirm the lid. Verify the exact rim fit and whether lids are included or sold separately. Equal capacity does not establish lid compatibility.
- Check the material. The linked PET beverage cups are listed for cold drinks. Do not assume hot-beverage or microwave suitability without an explicit specification for that exact product.
- Review both options. Confirm capacity and package count on the product page and in the cart.
- Test the service routine. Check filling, closure, cup-holder fit and normal upright transport before committing to a larger order.
Compare cost per usable serving
Divide the delivered cost of cups, compatible lids and required accessories by the number of usable finished servings. Separate lids, storage needs and pack quantities all affect the comparison.
For a smaller trial, view the 16 oz PET cup 25-piece option. After confirming the drink and lid fit, compare larger packs using the same requirements.
Common questions about cup sizes
Does “oz” mean liquid volume or weight?
In this guide it means US fluid ounces of capacity. An ounce of weight measures mass. You cannot substitute weight directly for container volume; check weight-based recipes separately.
Is a 16 oz cup a pint?
Sixteen US fluid ounces equals one US liquid pint. That is a volume conversion, not the practical fill line of every disposable cup.
How many milliliters are in a 24 oz cup?
Twenty-four US fluid ounces is approximately 710 mL. Allow space for your complete drink and lid.
Can different cup sizes share one lid?
Only when the product specifications confirm compatible rims and lids. Check the exact combination before buying.
Next step: compare PET cup sizes and package options, or read our guide to bowls for hot food when planning the rest of your takeout order.
