Liters to Kilograms Converter (Fresh water at 20 C (room temperature))
1 L equals 0.998207 kg, and 1 kg equals 1.0017962 L for fresh water at 20 c (room temperature). Enter a value in either box to convert liters to kilograms (fresh water at 20 c (room temperature)) and back. Formula: mass = volume x density (water at 20 C is 0.998207 g/mL; 1 US gal = 3.785411784 L).
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1 L = 0.998207 kg
Results shown are estimates for informational purposes only. Nothing on CalcFlow is financial, tax, legal, or medical advice. Always consult a qualified professional before making important decisions.
Liters to Kilograms Conversion Table
| Liters | Kilograms |
|---|---|
| 1 L | 0.998207 kg |
| 2 L | 1.996414 kg |
| 5 L | 4.991035 kg |
| 10 L | 9.98207 kg |
| 20 L | 19.96414 kg |
| 50 L | 49.91035 kg |
| 100 L | 99.8207 kg |
Kilograms to Liters Conversion Table
| Kilograms | Liters |
|---|---|
| 1 kg | 1.0017962 L |
| 2 kg | 2.0035924 L |
| 5 kg | 5.0089811 L |
| 10 kg | 10.017962 L |
| 20 kg | 20.035924 L |
| 50 kg | 50.089811 L |
| 100 kg | 100.17962 L |
Worked example: 10 L = 9.98207 kg for fresh water at 20 c (room temperature). A 10 US gallon aquarium holds 10 x 3.785411784 x 0.998207 = 37.79 kg of fresh water at 20 C, about 83.3 pounds.
Need other units? Open the full Water Volume to Weight Converter.
Popular Water Weight Conversions
Formula
mass = volume x density (water at 20 C is 0.998207 g/mL; 1 US gal = 3.785411784 L)Understanding Water Weight Conversion
The metric system was built around water: one liter of pure water at its densest, about 4 degrees C, has a mass of almost exactly one kilogram. At room temperature the figure is 0.998 kg per liter, and hot water is lighter per liter. A US gallon of fresh water weighs about 8.33 pounds, and a cubic foot weighs about 62.3 pounds. Seawater is about 2.5 percent denser than fresh water because of dissolved salt.
Tips and Best Practices
- 1For quick estimates use 1 liter = 1 kilogram and 1 US gallon = 8.34 pounds.
- 2A 50 gallon water heater holds roughly 416 pounds of water when full.
- 3Use the temperature selector for hot or cold water if precision matters.
Real-World Example
A 10 US gallon aquarium holds 10 x 3.785411784 x 0.998207 = 37.79 kg of fresh water at 20 C, about 83.3 pounds.
Common Mistakes to Avoid
- Using the US gallon figure (8.33 lb) for an imperial gallon, which holds about 10.0 lb.
- Forgetting that a container adds its own weight to the water.
- Using 1 kg per liter for seawater or brine.
How to Use
- Type a number in the Liters box.
- The Kilograms result appears instantly; you can also edit the Kilograms box to convert backwards.
- Use the swap button to reverse the direction and Copy result to copy the answer.
Frequently Asked Questions
How many kilograms are in 1 L?
How many liters are in 1 kg?
What is the formula to convert liters to kilograms?
How much does a liter of water weigh?
Sources: Water density from the CRC Handbook of Chemistry and Physics (g/mL): 4 C 0.999975, 20 C 0.998207, 25 C 0.997048, 100 C 0.958365; seawater is typically about 1.025. Volume units: NIST Handbook 44 Appendix B.