Convert an ingredient's weight in grams to volume in milliliters, or reverse the calculation. The important input is density: 100 g of flour, oil, and honey will not fill the same volume.
Enter a weight or a volume
Choose the direction, enter your amount, and select the ingredient. Water is the starting preset and uses the familiar kitchen approximation of 1 g/mL. For another ingredient, choose its specific preset or enter a custom density under the options.
When a package supplies both a weight and a volume for the same serving, you can estimate density by dividing the two. Serving labels may be rounded, so do not treat that estimate as exact.
Mass and volume answer different questions
A scale measures how much matter is present; a measuring jug indicates the space it occupies. Dry ingredients also contain air gaps, so their bulk density depends on filling and packing. The mL result for a powder is not the same as the volume of its solid particles with the air removed.
Examples
A kitchen water approximation
With Water selected, 100 g is approximately 100 mL. Reversing the direction returns approximately 100 g for 100 mL. This convenient relationship does not extend to all liquids.
Use a measured custom density
If a sample has density 0.9 g/mL, then 90 g occupies 100 mL. In the other direction, 250 mL weighs 225 g. Both answers rely on that supplied density.
Formula
Milliliters = grams ÷ density in g/mL
Grams = milliliters × density in g/mL
Density = measured grams ÷ measured mL
Density must be positive. The calculator accepts zero quantity, but it cannot divide by a zero density.
Choosing a suitable reference
Use the same ingredient state as the reference: dry versus cooked rice, packed versus loose sugar, and melted versus solid products can differ. For precise baking or any use outside ordinary food preparation, measure directly or obtain a density appropriate to temperature and composition.
Sources and conventions
Most ingredient presets are derived from King Arthur Baking’s ingredient weight chart using the stated recipe quantities and US-measure normalization. Water's 1 g/mL is an explicitly approximate kitchen assumption. The result panel names the reference used so you can decide whether it fits your ingredient.