Water Grams to Cups
One cup of water weighs 240 grams. Water is the reference point for every other ingredient — its density is almost exactly 1 gram per milliliter, so grams, milliliters, and the line on a measuring jug all line up.
Because 1 gram of water equals 1 milliliter, you can read a recipe’s water straight off a liquid measuring jug and be within a rounding error. A US cup is 237ml (about 237g); this page rounds to 240g for easy mental math. Temperature barely matters in the kitchen — water loses only about 4% of its weight per cup between room temperature and boiling.
1 Cup of Water in Grams
One cup of water weighs 240 grams. Here are the common cup fractions by weight:
Grams to Cups Converter
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Water Density at a Glance
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Water Conversion Chart
Common gram amounts of water converted to cups and tablespoons:
| Grams | Cups | Tablespoons |
|---|---|---|
| 30g | ⅛ cups | 2 tbsp |
| 40g | ⅛ cups | 3 tbsp |
| 50g | ¼ cups | 3 tbsp |
| 60g | ¼ cups | 4 tbsp |
| 70g | ⅓ cups | 5 tbsp |
| 75g | ⅓ cups | 5 tbsp |
| 80g | ⅓ cups | 5 tbsp |
| 90g | ⅜ cups | 6 tbsp |
| 100g | ⅜ cups | 7 tbsp |
| 120g | ½ cups | 8 tbsp |
| 125g | ½ cups | 8 tbsp |
| 150g | ⅝ cups | 10 tbsp |
| 175g | ¾ cups | 12 tbsp |
| 200g | ⅞ cups | 13 tbsp |
| 225g | ⅞ cups | 15 tbsp |
| 250g | 1 cups | 17 tbsp |
| 300g | 1¼ cups | 20 tbsp |
| 350g | 1½ cups | 23 tbsp |
| 400g | 1⅔ cups | 27 tbsp |
| 450g | 1⅞ cups | 30 tbsp |
| 500g | 2⅛ cups | 33 tbsp |
| 600g | 2½ cups | 40 tbsp |
| 750g | 3⅛ cups | 50 tbsp |
| 1000g | 4⅛ cups | 67 tbsp |
Each gram amount links to a page covering that conversion for all ingredients.
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Frequently Asked Questions
250 grams of water is just over 1 cup (about 1.04 cups). For cooking, treat 240g as exactly 1 cup.
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