How many cups is 3 oz?
3 fl oz = 3/8 cup
6 Tbsp · 89 mL
Measure with: 1/4 cup + 2 Tbsp · or spoons only: 6 Tbsp
Converter
Other cup standards
US cups: 0.375 · nutrition-label cups (240 mL): 0.37 · metric cups (250 mL): 0.355 · UK fluid ounces: 3.12
Three fluid ounces is 3/8 cup, a size no measuring set includes. Fill the 1/4 cup once and add 2 tablespoons, or simply use 6 level tablespoons.
This size comes up when packing a toiletry bag. TSA allows carry-on liquids in containers up to 3.4 oz (100 mL), so a 3 fl oz travel bottle fits with a little room to spare. The limit applies to the container size, even when a bigger bottle is only partly full.
Recipes that ask for 3 oz of cream cheese, chocolate or pasta are talking about weight. Those ingredients do not fill a cup the way water does, so check the package or a scale. The dry vs. liquid ounces page explains the difference.
| Fluid ounces | US cups | Cups (decimal) | Tablespoons | mL |
|---|---|---|---|---|
| 1 fl oz | 1/8 | 0.125 | 2 | 30 |
| 1.5 fl oz | ≈ 1/4 | 0.188 | 3 | 44 |
| 2 fl oz | 1/4 | 0.25 | 4 | 59 |
| 3 fl oz | 3/8 | 0.375 | 6 | 89 |
| 4 fl oz | 1/2 | 0.5 | 8 | 118 |
| 5 fl oz | 5/8 | 0.625 | 10 | 148 |
| 6 fl oz | 3/4 | 0.75 | 12 | 177 |
| 7 fl oz | 7/8 | 0.875 | 14 | 207 |
| 8 fl oz | 1 | 1 | 16 | 237 |
| 10 fl oz | 1 1/4 | 1.25 | 20 | 296 |
| 12 fl oz | 1 1/2 | 1.5 | 24 | 355 |
| 13.5 fl oz | ≈ 1 2/3 | 1.688 | 27 | 399 |
| 14 fl oz | 1 3/4 | 1.75 | 28 | 414 |
| 15 fl oz | 1 7/8 | 1.875 | 30 | 444 |
| 16 fl oz | 2 | 2 | 32 | 473 |
| 16.9 fl oz | ≈ 2 1/8 | 2.113 | 33.8 | 500 |
| 18 fl oz | 2 1/4 | 2.25 | 36 | 532 |
| 20 fl oz | 2 1/2 | 2.5 | 40 | 591 |
| 24 fl oz | 3 | 3 | 48 | 710 |
| 28 fl oz | 3 1/2 | 3.5 | 56 | 828 |
| 30 fl oz | 3 3/4 | 3.75 | 60 | 887 |
| 32 fl oz | 4 | 4 | 64 | 946 |
| 36 fl oz | 4 1/2 | 4.5 | 72 | 1,065 |
| 40 fl oz | 5 | 5 | 80 | 1,183 |
| 48 fl oz | 6 | 6 | 96 | 1,420 |
| 50 fl oz | 6 1/4 | 6.25 | 100 | 1,479 |
| 60 fl oz | 7 1/2 | 7.5 | 120 | 1,774 |
| 64 fl oz | 8 | 8 | 128 | 1,893 |
| 80 fl oz | 10 | 10 | 160 | 2,366 |
| 128 fl oz | 16 | 16 | 256 | 3,785 |
Questions
How many cups is 3 oz?
3 fl oz is 3/8 cup: 1/4 cup plus 2 tablespoons, or 6 tablespoons, about 89 mL.
Is a 3 oz bottle allowed on a plane?
Yes. TSA carry-on rules allow containers up to 3.4 oz (100 mL), so 3 fl oz is under the limit.
By Alton Vieira · Updated . Sources: US customary units: NIST Handbook 44. How we calculate.