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300g Water = 1 ¼ cups

300 grams of water equals 1 ¼ cups (1.27 US Customary cups, 1.2 Metric 250 mL cups, 299.5 mL, 20.25 tablespoons, or 10.58 oz) when measured poured liquid at a verified density of 237g per US Customary cup.

Exact decimal volume: 1.27 US Customary Cups • 1.2 Metric Cups (250 mL) • 20.25 tbsp • 10.58 oz

Batch
Measuring density
Standard: Poured liquid237g / cup
Converted Measure
300 g Water (Poured liquid) =
1 ¼ US Cups
Physical scoop breakdown1.27 cups
1 cup
1/4 cup
Edit either side to reverseWater chart →
Grams
300 g
Ounces
10.58 oz
US Cups
1 ¼ cups
Metric (250mL)
1.2 c
Tablespoons
20.25 tbsp
Milliliters
299.5 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 300g Water

Batch scaling conversion table around 300g 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×) 150g (5.29 oz) ½ cup + 2 tbsp + ½ tsp 149.7 mL
Standard (1×) 300g (10.58 oz) 1 ¼ cups 299.5 mL
1.5× Batch 450g (15.87 oz) 1 ¾ cups + 2 tbsp + 1 ¼ tsp 449.2 mL
Double Batch (2×) 600g (21.16 oz) 2 ½ cups + 1 ½ tsp 599 mL
Triple Batch (3×) 900g (31.75 oz) 3 ¾ cups + 2 ¼ tsp 898.4 mL

Measuring 300g of Water in the Kitchen

Because 1 US Customary Cup (236.6 mL) of water weighs 237g when measured poured liquid, 300 Grams (300g) translates to 1.27 US cups (1 ¼ cups).

Without a kitchen scale, measure 1 ¼ cups (20.25 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 300 grams of water? ▾

300 grams of water (Poured liquid, 237g per US cup) equals 1 ¼ cups (1.27 US Customary Cups, 1.2 Metric 250 mL cups, or 20.25 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.