Kilograms of Salt Water to Gallons Calculator
Salt water is denser than fresh water, so the same mass usually takes up a little less volume.
Salinity and temperature shift the density.
Kilograms of Salt Water to Gallons Calculator
Salt water is denser than fresh water, so the same mass usually takes up a little less volume.
Enter the liquid mass in kilograms.
Typical sea water is slightly denser than fresh water.
Typical sea water is slightly denser than fresh water.
Salinity and temperature shift the density.
Sea water converts a bit differently from fresh water because salt raises density.
Formula
US gallons = kilograms ÷ density in kg/L ÷ 3.785411784. UK gallons = kilograms ÷ density in kg/L ÷ 4.54609.
Interactive examples
Reference Table
Related liquid tools
Water is the baseline liquid for quick kilogram-to-gallon estimates and a useful reference for household measurements.
Juice varies by fruit type, sugar content, pulp, and concentration, so density should be treated as an estimate.
Milk density changes with fat content and processing, so whole, low-fat, and skim milk should be treated as approximate.
Salt Water / Sea Water Frequently asked questions
How many gallons is 1 kilogram of sea water?
Use the density shown on the page for a quick estimate.
Is sea water heavier than fresh water?
Yes, slightly.
Does salinity affect the result?
Yes, it is the main reason density changes.
Can I use this for aquarium water?
Yes, as an estimate for salt mixes.
Does temperature change sea water density?
Yes, slightly.