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½ US Cup Water = 118.5g

½ US Cup of water weighs 118.5 grams (4.18 ounces or 0.26 pounds; 118.3 mL or 8 tablespoons in volume) when measured poured liquid at a verified bulk density of 237g per 236.6 mL US Customary cup.

Imperial weight: 4.18 oz (0.26 lb) • Volume: 118.3 mL (8 tbsp)

Batch
Measuring density
Standard: Poured liquid237g / cup
Converted Measure
0.5 US cup Water (Poured liquid) =
118.5 g
Physical scoop breakdown0.50 cups
1/2 cup
Edit either side to reverseWater chart →
Grams
118.5 g
Ounces
4.18 oz
US Cups
½ cup
Metric (250mL)
0.47 c
Tablespoons
8 tbsp
Milliliters
118.3 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.

Batch Scaling Around ½ US Cup Water

Batch scaling conversion table around ½ US Cup of Water (0.5× to 3× recipe batches in grams, ounces, US cups, and milliliters)
Batch Scale Weight (g / oz) US Cups & Spoons Metric (mL)
Half Batch (0.5×) 59.3g (2.09 oz) ¼ cup 59.1 mL
Standard (1×) 118.5g (4.18 oz) ½ cup 118.3 mL
1.5× Batch 177.8g (6.27 oz) ¾ cup 177.4 mL
Double Batch (2×) 237g (8.36 oz) 1 cup 236.6 mL
Triple Batch (3×) 355.5g (12.54 oz) 1 ½ cups 354.9 mL

Measuring ½ US Cup of Water in the Kitchen

Measured poured liquid at a verified bulk density of 237g per US cup, ½ US cup of water weighs 118.5 grams (4.18 ounces).

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).

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

Frequently Asked Questions

How many grams is ½ cup of water? ▾

½ US Cup of water measured Poured liquid weighs 118.5 grams (4.18 ounces).

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.