Grams = millilitres × density in g/mL. Water is 1 g per mL, so 250 mL of water weighs 250 g. Other liquids differ: 250 mL of cooking oil weighs about 230 g and 250 mL of honey about 355 g. For a product such as an admixture or paint, use the density or specific gravity on its data sheet.
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mL to Grams Converter
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250 mL of water
250g
In kilograms
0.25 kg
Density used
1 g/mL
In ounces (weight)
8.82 oz
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Only water is exactly 1 g per mL. Other liquids and powders need their own density.
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Generated with myconstructioncalculator.com. Estimates for planning and ordering only; verify against drawings and specifications.
Formula
grams = mL × density (g/mL)mL = grams ÷ densitySpecific gravity = density in g/mL (water = 1)1 L = 1,000 mL; 1,000 g = 1 kg
Worked Example
250 mL of honey:
Density of honey ≈ 1.42 g/mL
Grams = 250 × 1.42 = 355 g
Grams in Common Measures
Substance
g per mL
1 cup (240 mL)
1 tablespoon (15 mL)
1 litre
Water
1.00
240 g
15 g
1,000 g
Milk
1.03
247 g
15.5 g
1,030 g
Cooking oil
0.92
221 g
13.8 g
920 g
Honey
1.42
341 g
21.3 g
1,420 g
Sugar (granulated)
0.85
204 g
12.8 g
850 g
Flour (spooned)
0.53
127 g
8 g
530 g
Diesel
0.84
202 g
12.6 g
840 g
Frequently Asked Questions
How many grams are in 1 mL?
For water, 1 gram. For anything else, the number of grams equals its density in g/mL: 1 mL of milk is about 1.03 g and 1 mL of oil about 0.92 g.
How do I convert grams to mL?
Divide the grams by the density. 1,000 g of cooking oil is 1,000 ÷ 0.92 = 1,087 mL.
Is mL to grams the same for flour and sugar?
No. Powders are lighter than water per mL and vary with how they are packed: spooned flour is about 0.53 g per mL and granulated sugar about 0.85. Weigh them when accuracy matters.
How do I convert a liquid admixture dose from mL to grams?
Multiply by the specific gravity on the data sheet. 500 mL of a superplasticiser with a specific gravity of 1.08 weighs 540 g.
How much does a litre of diesel weigh?
About 0.84 kg (840 g), depending on the fuel and its temperature. Petrol is lighter, about 0.74 kg per litre.
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