Water — Grams ↔ Cups Converter

1 US Customary cup (236.6 mL) of water weighs 237 grams (8.36 ounces or 14.8g per tablespoon) when measured poured liquid; 1 Metric cup (250 mL) weighs 250.4g and 100g equals ⅓ cup + 1 tbsp + 1 ¼ tsp for accurate kitchen baking.

Ingredient (150 verified staples)

Batch

Scale / Recipe Input

Measuring density

Standard: Poured liquid237g / cup

Converted Measure

100 g Water (Poured liquid) =

⅓ US Cup + 1 tbsp + 1 ¼ tsp

Physical scoop breakdown0.42 cups

1/3 cup

1 tbsp

1 ¼ tsp

Edit either side to reverseWater chart →

Grams

100 g

Ounces

3.53 oz

US Cups

⅓ cup + 1 tbsp + 1 ¼ tsp

Metric (250mL)

0.4 c

Tablespoons

6.75 tbsp

Milliliters

99.8 mL

Kitchen note: 1 US Customary Cup (236.6 mL) of water (poured liquid) weighs 237g, while 1 International Metric Cup (250 mL) weighs 250g.

Water: Cups & Spoons to Grams

Based on 237g per 236.6 mL US cup (Poured liquid).

Water cups, tablespoons, and teaspoons to grams and ounces conversion chart (237g per US cup)
Volume	Grams	Ounces
1 Teaspoon (tsp)	4.9 g	0.17 oz
1 Tablespoon (tbsp)	14.8 g	0.52 oz
⅛ US Cup (2 tbsp)	29.6 g	1.04 oz
¼ US Cup (4 tbsp)	59.3 g	2.09 oz
⅓ US Cup	79 g	2.79 oz
½ US Cup (8 tbsp)	118.5 g	4.18 oz
⅔ US Cup	158 g	5.57 oz
¾ US Cup (12 tbsp)	177.8 g	6.27 oz
1 US Cup (236.6 mL)	237 g	8.36 oz
1 Metric Cup (250 mL)	250.4 g	8.83 oz
1 ½ US Cups	355.5 g	12.54 oz
2 US Cups	474 g	16.72 oz
3 US Cups	711 g	25.08 oz
4 US Cups (1 Quart)	948 g	33.44 oz

Water: Grams to US Cups

Nearest practical baker cup & spoon breakdown.

Water grams to US cups and kitchen spoon fractions conversion chart
Weight	Kitchen Measure	Decimal
10 g	2 tsp	0.04 c
25 g	1 tbsp + 2 tsp	0.11 c
50 g	3 tbsp + 1 ¼ tsp	0.21 c
75 g	¼ cup + 1 tbsp + ¼ tsp	0.32 c
100 g	⅓ cup + 1 tbsp + 1 ¼ tsp	0.42 c
125 g	½ cup + 1 ¼ tsp	0.53 c
150 g	½ cup + 2 tbsp + ½ tsp	0.63 c
200 g	¾ cup + 1 tbsp + 1 ½ tsp	0.84 c
250 g	1 cup + 2 ¾ tsp	1.05 c
300 g	1 ¼ cups	1.27 c
400 g	1 ⅔ cups + 1 tsp	1.69 c
500 g	2 ⅛ cups	2.11 c
750 g	3 cups + 2 tbsp + 2 tsp	3.16 c
1000 g	4 cups + 3 tbsp + 1 ½ tsp	4.22 c

How to Measure Water Accurately

Place a liquid measuring cup on a flat countertop and read the water meniscus at eye level. Standard water has a pure density of 1.00 g/mL, making 1 US cup exactly 237 grams (or 236.6g).

Data reference: NIST Standard Reference Data; 1 US customary cup = 236.588 mL = 236.6 g pure water at 20°C

Common Culinary Uses

Bread dough hydration
Simmering grains and legumes
Syrup and brine preparation
Diluting extracts and leaveners

Weight-Aware Substitutions

Whole milk at 1:1 weight (adds 3.5% butterfat and milk solids).
Fruit juices or vegetable stocks at 1:1 weight for added flavor.

Water Measuring FAQs

Why is 1 cup of water exactly 237 grams? ▾

One US customary cup equals 236.588 milliliters; since water has a metric density of 1 gram per milliliter at room temperature, it weighs 237 grams.

Does water temperature affect cup weight? ▾

Warm or cold water varies in density by less than 0.5% across normal cooking ranges, maintaining 237 grams for all culinary purposes.