How many cups is 1 oz?
1 fl oz = 1/8 cup
2 Tbsp · 30 mL
Measure with: 2 Tbsp
Converter
Other cup standards
US cups: 0.125 · nutrition-label cups (240 mL): 0.123 · metric cups (250 mL): 0.118 · UK fluid ounces: 1.04
One fluid ounce is a small pour, so skip the measuring cups and grab a tablespoon: two level tablespoons hold exactly 1 fl oz. If your spoons are in the dishwasher, six teaspoons do the same job.
Many bar jiggers have a 1 fl oz side, and metric labels usually round 1 fl oz to 30 mL (the exact figure is 29.6 mL). That rounding makes no difference in a sauce or a dressing.
Be careful with recipes that list "1 oz" of a solid such as chocolate or cheese. That is 1 oz by weight, which only a scale can measure reliably. Butter is the friendly exception: 1 oz (weight) of butter is 2 Tbsp, marked right on the wrapper. More on that in dry vs. liquid ounces.
| 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
Is 1 oz the same as 1/8 cup?
Yes. 1 fl oz is exactly 1/8 cup, which is 2 tablespoons.
How many mL is 1 fl oz?
1 US fl oz is 29.57 mL. Labels and medicine cups usually round it to 30 mL.
How do I measure 1 oz without a jigger?
Use 2 level tablespoons of liquid. For a solid listed in ounces, weigh it instead, since the spoon only measures volume.
By Alton Vieira · Updated . Sources: US customary units: NIST Handbook 44. How we calculate.