Water
Ounce to Gram
Water — Quick Reference
Common ounce to gram conversions
| Ounce | Gram |
|---|---|
| 1oz | 28g |
| 2oz | 57g |
| 3oz | 85g |
| 4oz | 113g |
| 5oz | 142g |
| 6oz | 170g |
| 8oz | 227g |
| 10oz | 283g |
Based on water density of 1 g/ml (poured method). Source: USDA FoodData Central.
Understanding Water Conversions
The Math Behind This Conversion
To convert 1 ounces of water to grams, multiply by 28.3495 (the number of grams per ounce). So 1oz × 28.3495 = 28.3g.
Measurement Tip
Measure water in a liquid measuring cup (the kind with a spout) placed on a flat surface. Read the measurement at eye level, looking at the bottom of the meniscus (the curved surface of the liquid). For sticky liquids like honey, lightly coat the measuring cup with oil first to help it slide out easily.
About Our Data
The density value of 1 g/ml for water is from the USDA FoodData Central database (ID: 174158). This measurement was taken with water poured into the measuring cup.
Frequently Asked Questions
1 ounce of water weighs approximately 28 gram. This is based on a density of 1 g/ml for water.
Measure water in a liquid measuring cup placed on a flat surface. Read the measurement at eye level at the bottom of the meniscus.
Weighing water gives more consistent results than volume measurements. A cup of water can vary by 10-20% depending on how it's measured (spooned vs scooped). Professional bakers always weigh ingredients for this reason.
Water has a density of 1 g/ml, meaning each milliliter weighs 1 grams. Different ingredients have different densities—for example, flour is lighter than sugar—which is why each needs its own conversion factor.