Are grams and mL the same?

No. Grams measure mass and milliliters measure volume. They happen to be equal for water because water has a density of 1.0 g/mL, but that is the exception rather than the rule.

How many grams in 1 mL of water?

1 mL of water weighs approximately 1 gram at 4°C. At room temperature it is still very close to 1 gram, so water is the easiest baseline to remember.

How many grams in 1 mL of honey?

1 mL of honey weighs approximately 1.42 grams. That is why the same spoonful of honey weighs more than the same spoonful of water.

How many grams in 1 cup of flour?

1 US cup of all-purpose flour weighs approximately 140 grams. Flour is light and fluffy, so volume-to-weight conversions are only approximate unless you standardize the measuring method.

Why do grams and mL differ for most substances?

Because substances have different densities. Dense liquids like honey have more grams per mL, while light powders like flour have fewer grams per mL, so the same volume does not weigh the same.

How do I find the density of a substance?

Density equals mass divided by volume. Weigh a known volume, such as 100 mL, on a kitchen scale and divide the grams by 100 to get g/mL.

Grams to mL / mL to Grams Converter

Convert between grams and milliliters for 10+ substances including water, milk, honey, oil, flour, and sugar. Accounts for density differences.

Milliliters (mL)

Decimals

Direction

Substance

Grams

100.00

Mass (weight)

Milliliters

100.00

Volume

Fluid Ounces

3.38

100.00 ÷ 29.57

Cups (US)

0.42

100.00 ÷ 236.59

Tablespoons

6.76

100.00 ÷ 14.79

Teaspoons

20.29

100.00 ÷ 4.93

Ounces (wt)

3.53

100.00 ÷ 28.35

Kilograms

0.10

100.00 ÷ 1,000

Substance Density Table

Substance	Density (g/mL)	100 mL =	100 g =
Water	1	100.0 g	100.0 mL
Whole milk	1.03	103.0 g	97.1 mL
Heavy cream	0.994	99.4 g	100.6 mL
Honey	1.42	142.0 g	70.4 mL
Maple syrup	1.33	133.0 g	75.2 mL
Olive oil	0.92	92.0 g	108.7 mL
Coconut oil (liquid)	0.92	92.0 g	108.7 mL
All-purpose flour	0.593	59.3 g	168.6 mL
Granulated sugar	0.845	84.5 g	118.3 mL
Melted butter	0.911	91.1 g	109.8 mL

Key Point

Grams measure mass; mL measure volume. They are only equal for water (density ≈ 1.0 g/mL). For other substances, always use the correct density.

Planning notes, formulas, and examples

About the Grams to mL / mL to Grams Converter

This converter turns grams into milliliters and back again using ingredient density. The same gram value can represent very different volumes depending on what the ingredient is, so a simple 1:1 swap only works for water. Once you move to milk, honey, flour, sugar, or oil, the volume for the same mass changes enough that the ingredient itself matters.

It supports common kitchen ingredients like water, milk, honey, oils, flour, sugar, and butter, and it shows the neighboring kitchen units people usually need next: cups, tablespoons, teaspoons, fluid ounces, weight ounces, and kilograms. That gives you a single place to compare recipe measurements without opening a second chart or re-deriving the density. The extra outputs are especially handy when you are scaling a recipe or checking whether a label value was written by weight or by volume.

Use it when a recipe, label, or prep sheet mixes mass and volume and you need both values to stay aligned. The ingredient stays visible so the answer is tied to the substance being measured instead of a generic shortcut.

When This Page Helps

Recipes often switch between grams and milliliters, and the density difference can be large enough to ruin a bake or misstate a portion size. This page keeps the ingredient explicit so the conversion stays tied to the substance being measured. It is especially helpful when you need a repeatable number rather than a rough kitchen guess.

How to Use the Inputs

Enter grams or milliliters.
Select the conversion direction.
Choose the substance from the dropdown.
Read grams and mL side by side.
Check cups, tablespoons, and teaspoons for recipe use.
Consult the density table for all substances.

Formula used

Grams = mL × Density (g/mL). mL = Grams ÷ Density. Density of water = 1.0 g/mL; honey = 1.42 g/mL; flour = 0.593 g/mL.

Example Calculation

Result: 100 mL honey = 142 g = 5.01 oz

Honey has a density of 1.42 g/mL, so 100 mL weighs 142 grams — 42% more than water.

Tips & Best Practices

Only water has a 1:1 g-to-mL ratio (density = 1.0 g/mL at room temperature).
Flour is much lighter by volume: 1 cup (236 mL) ≈ 140 g, not 236 g.
Honey is dense: 1 cup ≈ 336 g (vs. 236 g for water).
Oil is lighter than water: 1 cup olive oil ≈ 217 g.
For the most accurate baking, always weigh ingredients in grams.
The density table shows what 100 mL and 100 g of each substance converts to.

Mass Vs. Volume In Cooking

Professional bakers usually prefer grams because volume measures change with scooping style, packing, and humidity. A scale removes that variability and gives the same result every time.

Common Density Values

Water is the baseline at 1.0 g/mL. Milk, honey, oil, flour, and sugar all differ from that baseline, which is why the ingredient matters as much as the number itself. The density presets are there to keep the conversion practical for everyday cooking.

Baking Accuracy

A gram-based recipe is easier to repeat, especially when it comes from a different country or a different measuring system. This converter helps keep those ingredient amounts consistent when you are moving between recipe formats.

Sources & Methodology

Last updated: March 8, 2026

Frequently Asked Questions

No. Grams measure mass and milliliters measure volume. They happen to be equal for water because water has a density of 1.0 g/mL, but that is the exception rather than the rule.