How Much Is 8 Fluid Ounces of Water in Ounces?
8 fluid ounces of water weighs 8.35 oz. This is based on water having a density of 236.59g per cup. Because fluid ounces measure volume and ounces measure weight, the result depends on the ingredient, and a different ingredient would give a different result for the same 8 fluid ounces.
Formula and Step-by-Step
- Start with 8 fluid ounces of water
- 1 fluid ounce of water = 29.57g
- 8 × 29.57 = 236.59g
- Convert grams to ounces: 236.59 ÷ 28.3495 = 8.35 oz
The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.
Measuring Tip
For liquids, place your measuring cup on a flat surface and read at eye level. The bottom of the meniscus (the curve at the surface) should align with the measurement line.
Water at Different Amounts
How water scales across common fluid ounces measurements. Your amount (8 fluid ounces) is highlighted.
For reference, 8 fluid ounces of water (236.59g) is close in weight to a cup of water (237g).
Other Amounts of Water
| Fluid Ounces | US Ounces | UK Fluid Ounce |
|---|---|---|
| 1 fluid ounce | 1.04 oz | 1.00 oz |
| 2 fluid ounces | 2.09 oz | 2.00 oz |
| 3 fluid ounces | 3.13 oz | 3.01 oz |
| 4 fluid ounces | 4.17 oz | 4.01 oz |
| 5 fluid ounces | 5.22 oz | 5.01 oz |
| 6 fluid ounces | 6.26 oz | 6.01 oz |
| 8 fluid ounces | 8.35 oz | 8.02 oz |
| 10 fluid ounces | 10.43 oz | 10.02 oz |
| 12 fluid ounces | 12.52 oz | 12.03 oz |
| 16 fluid ounces | 16.69 oz | 16.04 oz |
Understanding the Units
What is a Fluid Ounce?
A US fluid ounce (fl oz) is a unit of volume equal to 29.574 milliliters or 1/8 of a cup. It measures liquid volume and should not be confused with the ounce (oz), which measures weight.
What is an Ounce?
Ounces are commonly used in US recipes for cheese, meat, chocolate, and other ingredients sold by weight. Many kitchen scales offer both gram and ounce readings.