mL to Grams Calculator
Convert milliliters to grams using substance density. The conversion depends on what substance you are measuring — 1 mL of water weighs 1 gram, but other liquids differ. Perfect for cooking and science.
How to Convert mL to Grams
- Identify the substance and find its density in g/mL.
- Multiply the volume in milliliters by the density.
- The result is the mass in grams.
Formula
Grams = mL × Density (g/mL)
Example Calculation
Convert 250 mL of cooking oil to grams:
Density of cooking oil = 0.92 g/mL
Mass = 250 mL × 0.92 g/mL = 230 grams
Substance Density Reference Table
| Substance | Density (g/mL) | 100 mL = grams |
|---|---|---|
| Water | 1 | 100.00 g |
| Milk (whole) | 1.03 | 103.00 g |
| Cooking Oil | 0.92 | 92.00 g |
| Honey | 1.42 | 142.00 g |
| Gasoline | 0.75 | 75.00 g |
Frequently Asked Questions
Is 1 mL equal to 1 gram?
Only for water. 1 mL of water weighs approximately 1 gram. Other substances have different densities, so 1 mL may weigh more or less than 1 gram.
How many grams is 100 mL of milk?
Whole milk has a density of about 1.03 g/mL, so 100 mL of milk weighs approximately 103 grams.
How do I convert mL to grams for honey?
Honey has a density of about 1.42 g/mL. Multiply the mL by 1.42. For example, 50 mL of honey = 50 × 1.42 = 71 grams.
Can I use this for dry ingredients?
Yes, if you know the bulk density of the dry ingredient. However, dry ingredients can vary in density depending on how tightly they are packed.
What is the difference between mL and grams?
Milliliters (mL) measure volume — how much space something takes up. Grams (g) measure mass — how heavy something is. They are related through density.
Solved Examples
Example 1: Convert 200 mL of honey to grams
Solution:
Step 1: Identify density of honey = 1.42 g/mL
Step 2: Apply formula: grams = mL × density
Step 3: grams = 200 × 1.42 = 284
Answer: 200 mL of honey = 284 grams
Example 2: Convert 500 mL of milk to grams
Solution:
Step 1: Identify density of whole milk = 1.03 g/mL
Step 2: Apply formula: grams = mL × density
Step 3: grams = 500 × 1.03 = 515
Answer: 500 mL of milk = 515 grams
Example 3: Convert 750 mL of olive oil to grams
Solution:
Step 1: Identify density of olive oil = 0.92 g/mL
Step 2: Apply formula: grams = mL × density
Step 3: grams = 750 × 0.92 = 690
Answer: 750 mL of olive oil = 690 grams
Example 4: Convert 100 mL of flour to grams
Solution:
Step 1: Identify density of all-purpose flour = 0.59 g/mL (loosely scooped)
Step 2: Apply formula: grams = mL × density
Step 3: grams = 100 × 0.59 = 59
Answer: 100 mL of flour ≈ 59 grams (loosely packed)
Practice Questions
- How many grams is 250 mL of water? (Answer: 250 g)
- Convert 150 mL of olive oil to grams. (Answer: 138 g)
- A measuring cup holds 240 mL of honey. What is the mass? (Answer: 340.8 g)
- Convert 1000 mL of gasoline to grams. (Answer: 750 g)
- How many grams is 50 mL of mercury (density 13.6 g/mL)? (Answer: 680 g)
- A recipe calls for 125 mL of milk. How many grams is that? (Answer: 128.75 g)
Common Mistakes to Avoid
The biggest mistake in mL to grams conversions is assuming every liquid weighs 1 gram per mL. This only holds for water. Cooks often measure oil by volume and assume 1 mL = 1 gram, but 250 mL of cooking oil actually weighs only 230 grams — a 20-gram difference that matters in precise baking. Another common error is confusing volume (mL) with mass (grams) and treating them as the same thing. They measure fundamentally different properties and only happen to be numerically equal for water. For dry or powdered ingredients, the mistake of not accounting for packing is especially problematic: 100 mL of sifted flour weighs less than 100 mL of packed flour. Temperature also matters — hot liquids are slightly less dense, so the same volume weighs marginally less when warm.
Key Takeaways
- The core formula is: grams = mL × density (g/mL)
- 1 mL = 1 cc (cubic centimeter) — these units are identical
- For water at room temperature: 1 mL = 1 gram (density ≈ 1.0 g/mL)
- In cooking, density matters most for oils (lighter) and syrups/honey (heavier)
- Dry ingredients like flour have variable density depending on whether they are sifted, spooned, or packed
- When precision matters (baking, pharmacy), always weigh ingredients rather than relying on volume-to-mass conversions