Short answer
Not universally. One milliliter is a volume, while one gram is a mass. Water has a density close to 1 g/mL under ordinary kitchen conditions, so its numerical values are approximately equal. Other materials are different.
Mass (g) = Volume (mL) × Density (g/mL)
What does 1 mL weigh?
| Volume | Water | Milk | Cooking oil | Flour | Sugar |
|---|---|---|---|---|---|
| 1 mL | 1 g | 1.03 g | 0.88 g | 0.53 g | 0.84 g |
| 5 mL | 5 g | 5.15 g | 4.4 g | 2.65 g | 4.22 g |
| 10 mL | 10 g | 10.3 g | 8.8 g | 5.29 g | 8.45 g |
| 15 mL | 15 g | 15.45 g | 13.2 g | 7.94 g | 12.67 g |
| 25 mL | 25 g | 25.75 g | 22 g | 13.23 g | 21.12 g |
| 50 mL | 50 g | 51.5 g | 44 g | 26.45 g | 42.25 g |
| 100 mL | 100 g | 103 g | 88 g | 52.9 g | 84.5 g |
| 125 mL | 125 g | 128.75 g | 110 g | 66.12 g | 105.62 g |
| 150 mL | 150 g | 154.5 g | 132 g | 79.35 g | 126.75 g |
| 200 mL | 200 g | 206 g | 176 g | 105.8 g | 169 g |
| 240 mL | 240 g | 247.2 g | 211.2 g | 126.96 g | 202.8 g |
| 250 mL | 250 g | 257.5 g | 220 g | 132.25 g | 211.25 g |
| 500 mL | 500 g | 515 g | 440 g | 264.5 g | 422.5 g |
| 1000 mL | 1,000 g | 1,030 g | 880 g | 529 g | 845 g |
Why density matters
The difference comes from the mass contained in each milliliter. Honey at roughly 1.42 g/mL is heavier per mL than water. Olive oil at around 0.91 g/mL is lighter.
Worked examples
100 mL water × 1.00 = 100 g; 100 mL honey × 1.42 = 142 g; 100 mL olive oil × 0.91 = 91 g.
Limits of the 1:1 rule
Temperature, moisture and packing affect measurements. Use ingredient-specific values instead of assuming 1 g/mL outside water.
FAQs
Does 1 mL of milk equal 1 gram?
Milk is slightly heavier, approximately 1.03 g per mL.