Unit Converters
Water-to-Weight Converter
For water only, 1 gram weighs about the same as 1 milliliter takes up, which is the rule behind freeze-drying rehydration math. This converter takes an amount of water in weight or volume units and shows it as grams, milliliters, ounces and fluid ounces. The approximation applies to water, not oils, syrups or milk.
What This Tool Does
Enter an amount of water in any of the common units: grams, kilograms, ounces, pounds, milliliters, liters, fluid ounces or cups. You get the same amount expressed as grams, milliliters, ounces and fluid ounces.
Grams
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Weight, using 1 g ≈ 1 mL for water
Milliliters
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Volume, using 1 g ≈ 1 mL for water
Ounces (weight)
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Fluid Ounces (US)
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Close to weight ounces for water, coincidentally
What the Results Mean
All four outputs describe the same amount of water in different units. For water, a gram and a milliliter are close enough for kitchen and production math that they are treated as equal here. That coincidence carries further: 1 fluid ounce of water weighs close to 1 ounce, which is why the weight-ounce and fluid-ounce columns come out nearly equal for water and very different for oil or syrup.
The Formula
- Base: convert your entry to grams of water (1 mL ≈ 1 g, 1 L ≈ 1000 g, 1 US fl oz ≈ 29.5735 g, 1 US cup ≈ 236.588 g, 1 lb = 453.59237 g, 1 oz = 28.349523125 g)
- Milliliters = grams (approximation for water)
- Ounces (weight) = grams ÷ 28.349523125
- Fluid Ounces = grams ÷ 29.5735 (approximation for water)
Important Limitations
- The 1 g ≈ 1 mL rule is for water. Oils, syrups, milk and other liquids have different densities, so their weight-to-volume numbers differ: do not apply this converter to them.
- Fluid ounce and cup conversions use US measures. Imperial fluid ounces and metric cups differ.
- The approximation is a practical planning rule, not a laboratory density measurement.