mL to kg Calculator
Convert milliliters to kilograms using substance density. Since milliliters measure volume and kilograms measure mass, you need the density of the substance to convert between them. The formula is kg = (mL x density) / 1000.
How to Convert mL to kg
- Identify the substance and find its density in g/mL.
- Multiply the volume in milliliters by the density to get grams.
- Divide the grams by 1000 to convert to kilograms.
Formula
kg = (mL x density in g/mL) / 1000
grams = mL x density
Example Calculation
Convert 750 mL of milk to kg:
Density of whole milk = 1.03 g/mL
Mass = 750 mL x 1.03 g/mL = 772.5 g
kg = 772.5 / 1000 = 0.7725 kg
Substance Density Reference Table
| Substance | Density (g/mL) | 1000 mL = kg |
|---|---|---|
| Water | 1 | 1.000 kg |
| Milk (whole) | 1.03 | 1.030 kg |
| Olive Oil | 0.92 | 0.920 kg |
| Vegetable Oil | 0.91 | 0.910 kg |
| Honey | 1.42 | 1.420 kg |
| Flour (all-purpose) | 0.593 | 0.593 kg |
| Sugar (granulated) | 0.85 | 0.850 kg |
| Ethanol | 0.789 | 0.789 kg |
| Gasoline | 0.75 | 0.750 kg |
| Mercury | 13.6 | 13.600 kg |
Frequently Asked Questions
Is 1 mL always equal to 1 gram?
Only for water at 4 degrees Celsius. Other substances have different densities. For example, 1 mL of honey weighs about 1.42 grams, while 1 mL of oil weighs about 0.92 grams.
How many mL are in 1 kg of water?
Since water has a density of approximately 1 g/mL, 1 kg of water equals 1000 mL (1 liter).
Why do I need density to convert mL to kg?
Milliliters measure volume while kilograms measure mass. Different substances have different masses per unit volume (density), so you need to know what substance you are measuring.
Where can I find the density of a substance?
Check the product label, material safety data sheet (MSDS), or a chemistry reference. Temperature affects density, so use values at room temperature for everyday calculations.
How do I convert mL to kg for cooking ingredients?
Use the density of the ingredient. For example, 250 mL of flour (density 0.593 g/mL) = 250 x 0.593 = 148.25 g = 0.148 kg.