Water (Tap / Pure Liquid) — Cups to Grams & Grams to Cups Converter
Convert water between grams, cups, and spoons — 1 US cup = 236.59 g (8.35 oz) · 1 Metric cup = 250 g.
Water (Tap / Pure Liquid) Weight ↔ Volume Calculator
Convert grams ↔ US cups (236.59 mL), Metric cups (250 mL), tbsp, tsp, mL, and oz
Instant Equivalents for 1 US cup of Water
Water (Tap / Pure Liquid) — Cups, Tablespoons & Teaspoons to Grams Chart (US & Metric Cups)
Calculated using published density 1 g/mL (USDA FoodData Central & NIST). Includes side-by-side weights for both US Customary Cups (236.59 mL) and Metric Cups (250 mL). Values vary by brand, humidity and how you pack the cup.
| Volume Measure | US Volume (mL) | US Cup Grams (USDA / NIST (236.59 g/cup)) | Ounces (oz wt) | Metric Cup (250 mL) Grams |
|---|---|---|---|---|
| 1 Teaspoon (1 tsp) | 4.929 mL | 4.929 g | 0.1739 oz | 5 g (metric) |
| 1 Tablespoon (1 tbsp) | 14.79 mL | 14.79 g | 0.5216 oz | 15 g (metric) |
| 2 Tablespoons (1/8 cup) | 29.57 mL | 29.57 g | 1.043 oz | 31.25 g |
| 1/4 Cup (4 US tbsp) | 59.15 mL | 59.15 g | 2.086 oz | 62.5 g |
| 1/3 Cup (5 tbsp + 1 tsp) | 78.86 mL | 78.86 g | 2.782 oz | 83.33 g |
| 1/2 Cup (8 US tbsp) | 118.29 mL | 118.29 g | 4.173 oz | 125 g |
| 2/3 Cup | 157.73 mL | 157.73 g | 5.564 oz | 166.67 g |
| 3/4 Cup (12 US tbsp) | 177.44 mL | 177.44 g | 6.259 oz | 187.5 g |
| 1 Cup (16 US tbsp / 8 fl oz) | 236.59 mL | 236.59 g | 8.345 oz | 250 g |
| 1 ½ Cups | 354.88 mL | 354.88 g | 12.52 oz | 375 g |
| 2 Cups (1 US Pint) | 473.18 mL | 473.18 g | 16.69 oz | 500 g |
| 3 Cups | 709.76 mL | 709.76 g | 25.04 oz | 750 g |
| 4 Cups (1 US Quart / 1 Liter Metric) | 946.35 mL | 946.35 g | 33.38 oz | 1,000 g |
Water (Tap / Pure Liquid) — Grams to US Cups, Metric Cups, Tbsp, Tsp & Ounces Chart
Quick lookup for converting metric recipe weights in grams into US Customary cups (236.59 mL), Metric cups (250 mL), tablespoons, teaspoons, milliliters, and weight ounces at ρ = 1 g/mL.
| Weight (Grams) | US Cups (236.6 mL) | Metric Cups (250 mL) | Tablespoons (tbsp) | Teaspoons (tsp) | Milliliters (mL) | Ounces (oz) |
|---|---|---|---|---|---|---|
| 10 g | 0.0423 US cups | 0.04 metric cups | 0.6763 tbsp | 2.029 tsp | 10 mL | 0.3527 oz |
| 25 g | 0.1057 US cups | 0.1 metric cups | 1.691 tbsp | 5.072 tsp | 25 mL | 0.8818 oz |
| 50 g | 0.2113 US cups | 0.2 metric cups | 3.381 tbsp | 10.14 tsp | 50 mL | 1.764 oz |
| 75 g | 0.317 US cups | 0.3 metric cups | 5.072 tbsp | 15.22 tsp | 75 mL | 2.646 oz |
| 100 g | 0.4227 US cups | 0.4 metric cups | 6.763 tbsp | 20.29 tsp | 100 mL | 3.527 oz |
| 125 g | 0.5283 US cups | 0.5 metric cups | 8.454 tbsp | 25.36 tsp | 125 mL | 4.409 oz |
| 150 g | 0.634 US cups | 0.6 metric cups | 10.14 tbsp | 30.43 tsp | 150 mL | 5.291 oz |
| 200 g | 0.8454 US cups | 0.8 metric cups | 13.53 tbsp | 40.58 tsp | 200 mL | 7.055 oz |
| 250 g | 1.057 US cups | 1 metric cups | 16.91 tbsp | 50.72 tsp | 250 mL | 8.818 oz |
| 500 g | 2.113 US cups | 2 metric cups | 33.81 tbsp | 101.44 tsp | 500 mL | 17.64 oz |
| 1000 g | 4.227 US cups | 4 metric cups | 67.63 tbsp | 202.88 tsp | 1,000 mL | 35.27 oz |
How to Measure Water Accurately (Scale vs. Liquid Pitcher)
Water is the foundational baseline for kitchen density: at standard temperature, 1 milliliter (mL) of liquid water has a mass of 1.000 gram. Because of this 1:1 metric relationship, converting milliliters of water to grams requires no math at all—250 mL of water weighs 250 grams.
However, when converting US Customary cups and ounces of water to grams, many cooks fall into the 'fluid ounce vs. weight ounce' trap. 1 US Customary cup equals 8 US fluid ounces (236.59 mL), which weighs 236.59 grams—or 8.35 avoirdupois weight ounces (not 8.0 weight ounces, which would be 226.8 g). Meanwhile, 1 US Legal/FDA cup (240 mL) of water weighs 240 grams, and 1 Metric cup (250 mL) weighs 250 grams.
Step-by-Step Kitchen Measuring Technique
Even calibrated glass measuring pitchers in home kitchens can be off by 5% to 10%. Weighing water in grams on a digital scale is the gold standard for bread baking and coffee brewing.
- Weigh in grams for bread & coffee: Since 1 g of water = 1 mL, weighing water on a scale gives 1-gram (1 mL) accuracy for sourdough hydration percentages and pour-over coffee ratios.
- Check your cup standard: Verify whether your recipe uses a US Customary cup (236.59 g), a US Legal cup (240 g), or a Commonwealth Metric cup (250 g).
- Read the meniscus at eye level: If using a graduated pitcher, set it on a flat counter and align the bottom of the curved water surface with the mark.
Culinary & Baking Notes for Water (Tap / Pure Liquid)
- Water temperature and density: Cold water at 4 °C has a density of 1.0000 g/mL; room-temperature water at 20 °C is 0.9982 g/mL; and near-boiling water at 95 °C is 0.9619 g/mL (~227.6 g per US cup).
- Calibrate your kitchen measuring cups with water: Place your empty measuring cup on a digital scale, tare to zero, and fill to the 1-cup rim with room-temperature water. A true US cup will read ~236.6 g; a Metric cup will read 250 g.
- Ice vs. liquid water: Ice is about 8% less dense than liquid water (0.917 g/mL), and crushed or cubed ice traps large air gaps (~140–150 g per cup).
US Cup vs. Metric Cup vs. UK Cup Weight for Water (Tap / Pure Liquid)
If you are adapting an international recipe, remember that cup sizes vary by country. Here is how much 1 cup of water (tap / pure liquid) weighs across all four global cup standards (at ρ = 1 g/mL):
Step-by-Step Conversion Examples for Water (Tap / Pure Liquid)
Convert 2 US Cups of Water to Grams & Milliliters
A soup or bread recipe calls for 2 US Customary cups of water.
Convert 1 Metric Cup (250 mL) of Water to Grams
You are measuring 1 Metric cup (250 mL) of water.
Convert 500 Grams of Water to US Cups
A sourdough loaf requires 500 g of water.
Published Density References & Citations for Water (Tap / Pure Liquid)
U.S. Department of Agriculture, FoodData Central: Water, tap, municipal (FDC ID 173647, rounded label 237 g/cup; exact US Customary cup = 236.588 mL at 1.0000 g/mL).
Frequently Asked Questions About Water (Tap / Pure Liquid) Conversions
How many grams are in 1 cup of water?
1 US Customary cup (236.59 mL) of water weighs 236.59 grams (often rounded to 237 g). 1 US Legal/FDA cup (240 mL) of water weighs 240 grams, and 1 Metric cup (250 mL) of water weighs exactly 250 grams.
Why does 1 cup (8 fl oz) of water weigh 8.35 ounces instead of 8 ounces?
A US fluid ounce measures volume (29.57 mL), whereas an avoirdupois ounce measures weight (28.35 g). Because 1 fl oz of water weighs 29.57 g, 8 fl oz of water weighs 236.59 g ÷ 28.35 g/oz = 8.35 weight ounces. (In the UK Imperial system, 1 Imperial fl oz of water equals 28.41 mL, which does weigh 1 avoirdupois ounce).
How many grams is 1 tablespoon and 1 teaspoon of water?
1 US tablespoon of water (14.79 mL) weighs 14.79 grams (rounded to 15 g for metric tablespoons), and 1 US teaspoon of water (4.93 mL) weighs 4.93 grams (rounded to 5 g for metric teaspoons).
Does 1 gram of water equal 1 milliliter?
Yes. By metric definition, 1 milliliter (1 cubic centimeter) of pure water has a mass of 1 gram, making grams and milliliters interchangeable for water.