Use this mL to Grams Converter to estimate the weight of a liquid or kitchen ingredient from its volume. Choose an ingredient with a preset density or enter a custom density when you know the value for a specific product.

Important: Milliliters measure volume while grams measure mass. There is no universal conversion from mL to grams because different substances have different densities.

mL to Grams Formula

The conversion uses the relationship between mass, volume, and density:

Grams = milliliters × density in g/mL

For the reverse conversion:

Milliliters = grams ÷ density in g/mL

If both mass and volume are known:

Density = grams ÷ milliliters

Why Density Matters

Two ingredients can occupy the same volume but have different weights.

For example, water has a density close to 1 g/mL, so for ordinary kitchen estimates:

100 mL of water ≈ 100 g

However, the same shortcut should not be used for oil, honey, flour, sugar, rice, oats, or other ingredients because their densities differ.

Even water is not exactly 1 g/mL under all conditions because its density changes slightly with temperature.

Worked Example

Suppose you want to convert 250 mL of an ingredient with a density of 0.85 g/mL.

Apply the formula:

Grams = 250 × 0.85

Grams = 212.5 g

So, 250 mL of that ingredient has an estimated mass of 212.5 grams.

Custom Density

If your ingredient is not available in the preset list, use the custom-density option with reliable product-specific density data.

If density is given in kilograms per cubic meter:

Density in g/mL = density in kg/m³ ÷ 1,000

For example:

850 kg/m³ = 0.85 g/mL

Kitchen Volume Units

The converter can also accept common kitchen volume units and convert them internally before applying the density formula.

Useful approximate U.S. kitchen equivalents include:

• 1 teaspoon ≈ 4.93–5 mL
• 1 tablespoon ≈ 14.79–15 mL
• 1 US fluid ounce ≈ 29.57 mL
• 1 US cup ≈ 236.59 mL

Kitchen references sometimes round these values, so small differences between recipe converters are normal.

Important Notes

• Preset ingredient densities are practical estimates rather than exact values for every brand or product.
• Flour, sugar, oats, rice, and other dry ingredients can vary because of packing, settling, moisture, grind size, and measuring technique.
• Liquids can also change density with temperature and composition.
• For precise baking or recipe development, weighing ingredients directly with a kitchen scale is generally more reliable than converting volume to weight.
• A fluid ounce measures volume, while an ounce without “fluid” normally refers to mass or weight. They are not interchangeable.
• For nutrition tracking, use product-specific weights or weigh the actual food when better accuracy is required.
• Do not use approximate kitchen-density conversions for medication dosing, laboratory procedures, industrial formulation, or other safety-critical applications.

Sources

• NIST — Metric Kitchen: Culinary Measurement Tips
• NIST — U.S. Customary to Metric Conversions
• U.S. Geological Survey — Water Density and Temperature