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Grams to Milliliters Converter

Turning a weight in grams into a volume in millilitres? The two only match for water, so choose your substance and the tool applies its density.

Grams ⇄ Milliliters
g
=
mL
Substance:
Result100 g = 100 mL (Water)
Quick answer
For water the numbers line up: 1 g = 1 mL, so 100 g of water is 100 mL. Lighter substances take up more room, flour at 0.53 g/mL means 100 g fills about 189 mL, while dense honey (1.42 g/mL) is only 70 mL. Set the substance to convert grams to millilitres correctly.

Conversion table

Grams (g)Milliliters (mL)
10 g10
25 g25
50 g50
100 g100
250 g250
500 g500
1000 g1000

How to convert Grams to mL

mL = grams ÷ densitywater density = 1 g/mL · reverse: grams = mL × density
grams
the weight you enter
mL
the volume it occupies
density
grams per mL for the chosen substance

Grams weigh mass and millilitres measure volume, so they only convert one-to-one for water and other density-1 liquids.

Frequently asked questions

Is 1 gram the same as 1 mL?

For water, yes. For flour, oil or honey it is not, because their density differs from water.

How many mL is 100 grams of flour?

About 189 mL, using an all-purpose flour density of 0.53 g/mL.

How many mL is 250 grams of water?

250 g of water is 250 mL.

Why do I need the substance?

Because density links weight to volume, and it is different for every ingredient.