Cooking conversions
Grams to milliliters converter
Turn a weight into a volume. For water and milk the answer is nearly one-to-one; for oil, honey or flour the density makes all the difference.
Milliliters
100ml
100 g of water = 100 ml
How to convert grams to ml
Milliliters measure volume, so the conversion depends on density. Water is the easy case: 1 g = 1 ml. Milk is close at 245 g per 240 ml cup. Oil is lighter (100 g of vegetable oil is about 110 ml) and honey is much heavier (100 g is only about 71 ml).
The converter divides your grams by the ingredient's grams-per-milliliter density, derived from its standard grams-per-cup value over a 240 ml cup.
Good to know
- 100 g water = 100 ml
- 100 g milk ≈ 98 ml
- 100 g olive oil ≈ 111 ml
- 100 g honey ≈ 71 ml
Worked example: 100 g of honey to milliliters
Honey weighs 340 g per 240 ml cup, so its density is about 1.42 g/ml. Divide 100 g by 1.42 ≈ 71 ml. The same 100 g of water would be 100 ml, because water’s density is 1 g/ml.
Frequently asked questions
Is 1 gram always 1 milliliter?
Only for water, which has a density of 1 g/ml. Milk is close (about 1.02 g/ml), but oil is lighter and honey is much heavier, so the ingredient changes the result.
How many milliliters is 100 g of oil?
Vegetable oil is about 218 g per 240 ml cup, a density of roughly 0.91 g/ml. So 100 g of vegetable oil is about 110 ml.
Can I convert grams of flour to milliliters?
You can, but milliliters measure volume and flour is usually measured by weight or cups. Flour’s density is about 0.52 g/ml, so 100 g is roughly 192 ml — not a practical kitchen measure.
What is the difference between ml and fluid ounces?
Milliliters are metric volume; US fluid ounces are imperial (1 fl oz ≈ 29.57 ml). This tool outputs milliliters. For weight ounces, use the ounces-to-grams converter.
Why does the converter ask for an ingredient?
Because grams measure weight and milliliters measure volume, the conversion needs the ingredient’s density. The density is derived from its standard grams-per-cup value over a 240 ml cup.
Are these densities accurate for hot liquids?
Density shifts slightly with temperature, but the change is small for cooking. Use the room-temperature values here; for candy-making where precision matters, weigh directly.
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