Converting 21 ml to grams results in approximately 21 grams if the substance has a density of 1 g/ml. This means that for liquids like water, 21 ml equals 21 grams, because their densities are equal.
Since grams measure mass and milliliters measure volume, to convert from ml to grams, you multiply the volume by the density of the substance in g/ml. For water, with a density of 1 g/ml, the calculation is straightforward: 21 ml x 1 g/ml = 21 grams.
Conversion Result
21 ml is equal to 21 grams when the substance’s density is 1 g/ml, such as water. For other substances, the grams will vary depending on their density.
Conversion Tool
Result in grams:
Conversion Formula
The formula to convert milliliters to grams is: Grams = Volume in ml * Density in g/ml. This works because density relates mass and volume. For example, water’s density is 1 g/ml, so 10 ml of water equals 10 grams. For liquids with different densities, adjust the formula accordingly.
Step-by-step math: For 21 ml of water, multiply 21 by 1 (density): 21 * 1 = 21 grams. If a liquid has a density of 0.8 g/ml, then 21 ml would be 21 * 0.8 = 16.8 grams.
Conversion Example
- Convert 15 ml of honey (density approx 1.42 g/ml): 15 * 1.42 = 21.3 grams.
- Convert 50 ml of olive oil (density approx 0.92 g/ml): 50 * 0.92 = 46 grams.
- Convert 10 ml of ethanol (density approx 0.789 g/ml): 10 * 0.789 = 7.89 grams.
- Convert 5 ml of milk (density approx 1.03 g/ml): 5 * 1.03 = 5.15 grams.
- Convert 25 ml of syrup (density approx 1.33 g/ml): 25 * 1.33 = 33.25 grams.
Conversion Chart
| ml | grams |
|---|---|
| -4.0 | -4.0 |
| -3.0 | -3.0 |
| -2.0 | -2.0 |
| -1.0 | -1.0 |
| 0.0 | 0.0 |
| 1.0 | 1.0 |
| 2.0 | 2.0 |
| 3.0 | 3.0 |
| 4.0 | 4.0 |
| 5.0 | 5.0 |
| 10.0 | 10.0 |
| 15.0 | 15.0 |
| 20.0 | 20.0 |
| 25.0 | 25.0 |
| 30.0 | 30.0 |
| 35.0 | 35.0 |
| 40.0 | 40.0 |
| 45.0 | 45.0 |
| 50.0 | 50.0 |
| 46.0 | 46.0 |
Use this chart to estimate grams for various ml amounts assuming densities close to water. For other substances, multiply the ml value by the specific density to find grams.
Related Conversion Questions
- How many grams are in 21 ml of honey?
- What is the weight in grams of 21 ml of olive oil?
- If I have 21 ml of ethanol, how many grams does it weigh?
- Can I convert 21 ml of milk to grams accurately?
- What is the gram equivalent of 21 ml of syrup?
- How do I convert 21 ml of a viscous liquid to grams?
- Does the conversion of 21 ml to grams change based on substance?
Conversion Definitions
Milliliter (ml): A unit of volume measurement used primarily for liquids, representing one-thousandth of a liter. It indicates how much space a liquid occupies, regardless of its density or weight.
Gram (g): A metric unit of mass used to quantify the amount of matter in an object or substance. It is a standard measurement in cooking and science, often used to measure weights of solids and liquids.
Conversion FAQs
Is the conversion from ml to grams always 1:1?
No, it depends on the density of the substance. For water, 1 ml equals 1 gram because its density is 1 g/ml. For other liquids, the grams will vary, requiring multiplication by the specific density.
Can I convert 21 ml of any liquid to grams without knowing its density?
Not accurately. Without knowing the density, you can only assume a 1 g/ml conversion, which is accurate for water but not for other substances. For precise results, always consider the substance’s density.
What if the density of my liquid isn’t exactly 1 g/ml?
You need to multiply the volume in ml by the actual density in g/ml. For example, if the density is 0.9 g/ml, then 21 ml equals 21 * 0.9 = 18.9 grams effectively.
How do I find the density of a liquid?
Density can be found through laboratory measurement or from product specifications. It is often listed on product labels or in material safety data sheets, especially for liquids used in cooking or manufacturing.
Is the conversion affected by temperature?
Yes, density can change with temperature, which affects the ml to grams conversion. For precise measurements, account for temperature conditions or use standard reference densities.
Last Updated : 22 July, 2025
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Sandeep Bhandari holds a Bachelor of Engineering in Computers from Thapar University (2006). He has 20 years of experience in the technology field. He has a keen interest in various technical fields, including database systems, computer networks, and programming. You can read more about him on his bio page.