ml to Grams Converter

Amount

From

Ingredient

A cup of flour weighs 125 g and a cup of honey weighs 340 g. Weight and volume cannot be converted without knowing what is being measured.

Loaded with an example. Type over the amount.

Answer

257.832g

250 ml of milk weigh 257.832 g

What each figure is

A weight and a volume are different kinds of quantity. These are the numbers that connect them.

What you enteredYou chose thisthe figure in millilitres250 ml
The ingredientYou chose thiswithout this the question has no answer — see belowMilk
What it weighs244 g per US cup, or 1.0313 g per millilitre1.0313 g/ml
The two sides in common unitsthe weight and the space it occupies, which is what density connects257.832 g = 250 ml
The answerthe same milk, measured in grams257.832 g

How that was worked out

Each step, and why it is that step.

Step 1 — Multiply by the density
250 ml × 1.0313 g/ml = 257.832 g
Milk weighs 1.0313 g per millilitre, so that many millilitres weigh this much.

Check it backwards: 257.832 g ÷ 1.0313 g/ml = 250 ml

The mistake this prevents

A converter that ignores the ingredient treats every millilitre as a gram, and would tell you 250 g — out by 3%. Milk is heavier than water, and the gap is the whole reason this field exists.

Check this before you rely on it. A free everyday calculator, provided as a guide — not tax, accounting, financial or legal advice. The working is shown above so you can verify it against your own figures. See our terms of use.

How it works

STEP 1

Type the volume

In millilitres, or litres, cups and spoons if that is what you have.

STEP 2

Choose the ingredient

The converter multiplies by that ingredient’s density — grams per millilitre — and shows the figure it used, so the answer can be checked rather than trusted.

STEP 3

Read it both ways

The breakdown shows the volume and the weight side by side, and the working runs the sum backwards so you can confirm it.

What this doesn't cover

Knowing where a calculator stops is what makes the rest of it trustworthy.

Only water is one-to-oneThe gram was originally defined as the mass of a cubic centimetre of water, which is why the two line up exactly. Treating any other ingredient the same way is the single commonest cooking-conversion error there is.

Temperature moves density slightlyWater is 1.000 g/ml near 4 °C and about 0.997 at room temperature. For cooking that is inside the noise, so it is ignored here. For laboratory work it is not, and this is not a laboratory tool.

Common questions

Is 1 ml the same as 1 gram?

Only for water. The gram was defined from a cubic centimetre of water, so the two match exactly for that and for nothing else. A millilitre of olive oil is 0.92 g and a millilitre of honey is 1.44 g.

How many grams is 100ml of milk?

About 103 g. Milk is a little denser than water because of the sugars and proteins dissolved in it, at roughly 1.03 g per ml.

How many grams is 100ml of oil?

About 92 g. Vegetable and olive oils are around 0.92 g per ml, which is why oil floats on water.

How do I convert grams to ml?

Divide by the density instead of multiplying by it. Use the swap button — the converter runs in both directions and shows the arithmetic either way.

Why does the volume tab refuse to convert ml to grams?

Because volume and weight are different kinds of quantity, and answering without knowing the ingredient means quietly assuming water. That is wrong by 89% for flour. The refusal is deliberate — use this page instead, where the ingredient is asked for.