One-Third Cup of Water in Grams
1/3 cup of water weighs 80g (2.82 oz, 80ml) according to USDA FoodData Central (1 cup water = 240g, spooned and leveled method). 1/3 cup = 0.3333 of a full cup (240ml). See the full conversion table below for all amounts from 1 tablespoon to 3 cups.
Water Cup-to-Gram Conversion Table
Full range from 1 tablespoon to 3 cups. The highlighted row shows 1/3 cup.
| Amount | Grams |
|---|---|
| 1 tbsp | 15g |
| 2 tbsp | 30g |
| 1/8 cup | 30g |
| 1/4 cup | 60g |
| 1/3 cupthis page | 80g |
| 1/2 cup | 120g |
| 2/3 cup | 160g |
| 3/4 cup | 180g |
| 1 cup | 240g |
| 1 1/4 cups | 300g |
| 1 1/2 cups | 360g |
| 1 3/4 cups | 420g |
| 2 cups | 480g |
| 2 1/2 cups | 600g |
| 3 cups | 720g |
Source: USDA FoodData Central (FDC ID: 14555). 1 US cup = 240ml. Values use spooned-and-leveled method.
1/3 Cup of Different Ingredients — Weight Comparison
1/3 cup of different ingredients varies widely in weight because each has a different density. This matters when substituting ingredients in recipes.
| Ingredient | 1/3 Cup (g) |
|---|---|
| Olive Oil | 72g |
| Vegetable Oil | 72.67g |
| Coconut Oil | 72.67g |
| Canola Oil | 72.67g |
| Watercurrent | 80g |
All values use USDA FoodData Central spooned-and-leveled method. Click any ingredient to see its full conversion table.
Measuring Water Accurately
Why weight matters: 1/3 cup of water can weigh anywhere from 68g to 96g depending on how you measure it. The USDA standard is 80g (spooned and leveled). Scooping directly from the container can add 10–20% extra weight, which affects recipe results — especially in baking.
About water density: Water is the reference point for all density measurements. 1 cup (240ml) = 240g exactly. All liquid measurements in recipes assume water-like density unless specified. Use water as baseline for density calculations.
About 1/3 Cup as a Measurement
1/3 cup = 5 tablespoons + 1 teaspoon = 80ml. This unusual fraction appears in recipes that scale for 2 servings from a 3-serving base. It cannot be made from combining standard 1/4 and 1/8 cup measures without error.
One-third cup is common in yogurt parfait recipes, small-batch granola bars, and single-layer cake recipes scaled for 2 servings. It is exactly 80ml in metric volume.
Frequently Asked Questions
How many grams is 1/3 cup of water?
1/3 cup of water weighs 80 grams (2.82 oz, 80ml). Based on USDA FoodData Central: 1 cup water = 240g, so 1/3 cup = 240 × 0.333 = 80g.
Is 1/3 cup of water the same weight every time?
The weight can vary slightly depending on measuring technique. Spooned and leveled gives 80g. Scooped (packed) can be 10–20% heavier. Sifted gives a lighter weight. The USDA standard (spooned and leveled) of 80g is the most reliable baseline for recipes.
How do I accurately measure 1/3 cup of water?
For accuracy, use a kitchen scale and weigh 80g of water. If using measuring cups, spoon the water lightly into a 1/3 Cup measuring cup and level off the top with a straight edge. Avoid scooping directly from the container, which compacts the ingredient and adds extra weight.
How does 1/3 cup of water compare to other ingredients?
1/3 cup of different ingredients varies significantly: Olive Oil = 72g, Vegetable Oil = 72.67g, Coconut Oil = 72.67g. This is because each ingredient has a different density.