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120g Water = ½ cup

120 grams of water equals ½ cup (0.51 US Customary cups, 0.48 Metric 250 mL cups, 119.8 mL, 8.1 tablespoons, or 4.23 oz) when measured poured liquid at a verified density of 237g per US Customary cup.

Exact decimal volume: 0.51 US Customary Cups • 0.48 Metric Cups (250 mL) • 8.1 tbsp • 4.23 oz

Batch
Measuring density
Standard: Poured liquid237g / cup
Converted Measure
120 g Water (Poured liquid) =
½ US Cup
Physical scoop breakdown0.51 cups
1/2 cup
Edit either side to reverseWater chart →
Grams
120 g
Ounces
4.23 oz
US Cups
½ cup
Metric (250mL)
0.48 c
Tablespoons
8.1 tbsp
Milliliters
119.8 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.

Batch Scaling Around 120g Water

Batch scaling conversion table around 120g 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×) 60g (2.12 oz) ¼ cup 59.9 mL
Standard (1×) 120g (4.23 oz) ½ cup 119.8 mL
1.5× Batch 180g (6.35 oz) ¾ cup 179.7 mL
Double Batch (2×) 240g (8.47 oz) 1 cup 239.6 mL
Triple Batch (3×) 360g (12.7 oz) 1 ½ cups + 1 tsp 359.4 mL

Measuring 120g of Water in the Kitchen

Because 1 US Customary Cup (236.6 mL) of water weighs 237g when measured poured liquid, 120 Grams (120g) translates to 0.51 US cups (½ cup).

Without a kitchen scale, measure ½ cup (8.1 tablespoons total) using poured liquid technique. 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 cups is 120 grams of water? ▾

120 grams of water (Poured liquid, 237g per US cup) equals ½ cup (0.51 US Customary Cups, 0.48 Metric 250 mL cups, or 8.1 tablespoons).

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.