Kilograms to Liters Converter (Fresh water at 20 C (room temperature))

1 kg equals 1.0017962 L, and 1 L equals 0.998207 kg for fresh water at 20 c (room temperature). Enter a value in either box to convert kilograms to liters (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 kg = 1.0017962 L

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.

Kilograms to Liters Conversion Table

KilogramsLiters
1 kg1.0017962 L
2 kg2.0035924 L
5 kg5.0089811 L
10 kg10.017962 L
20 kg20.035924 L
50 kg50.089811 L
100 kg100.17962 L

Liters to Kilograms Conversion Table

LitersKilograms
1 L0.998207 kg
2 L1.996414 kg
5 L4.991035 kg
10 L9.98207 kg
20 L19.96414 kg
50 L49.91035 kg
100 L99.8207 kg

Worked example: 10 kg = 10.017962 L 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.

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

  1. Type a number in the Kilograms box.
  2. The Liters result appears instantly; you can also edit the Liters box to convert backwards.
  3. Use the swap button to reverse the direction and Copy result to copy the answer.

Frequently Asked Questions

Q

How many liters are in 1 kg?

1 kg equals 1.0017962 L for fresh water at 20 c (room temperature).
Q

How many kilograms are in 1 L?

1 L equals 0.998207 kg for fresh water at 20 c (room temperature).
Q

What is the formula to convert kilograms to liters?

mass = volume x density (water at 20 C is 0.998207 g/mL; 1 US gal = 3.785411784 L).
Q

How much does a liter of water weigh?

About 0.998 kilograms at room temperature, and 0.99997 kg at 4 degrees C.

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.