How Much Does a Full Water Tank Weigh? 55 to 1,000 Gallons
Water weighs about 8.34 lb per gallon. This chart gives full weights for common tank sizes and shows how to check your floor or pad before installing.
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TL;DR: One US gallon of water weighs about 8.34 lb. A full 275 gallon tank holds about 2,294 lb of water, 330 gallons about 2,752 lb and 1,000 gallons about 8,340 lb, before adding the tank. For other liquids multiply by specific gravity. LT Plastics, an authorized Bonar Plastics distributor based in Phoenix, AZ, supplies HDPE bulk containers, hoppers, tanks and speed bumps to US plants.
Quick Facts: Water Weight by Tank Size
| Tank size | Water weight | Water weight (kg) |
|---|---|---|
| 55 gal | about 459 lb | about 208 kg |
| 100 gal | about 834 lb | about 378 kg |
| 200 gal | about 1,668 lb | about 757 kg |
| 275 gal | about 2,294 lb | about 1,041 kg |
| 330 gal | about 2,752 lb | about 1,248 kg |
| 500 gal | about 4,170 lb | about 1,893 kg |
| 1,000 gal | about 8,340 lb | about 3,785 kg |
Water at room temperature: 1 liter is close to 1 kg.
Other Liquids
Weight = gallons x 8.34 x specific gravity. Example: a 1,000 gallon tank of a solution with SG 1.3 holds about 10,840 lb. Check your chemical against the tank first with the HDPE chemical compatibility checklist.
Floor and Pad Check
For portable IBCs see IBC tote weight empty and full; for forklift moves see the forklift capacity check.
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Next Step
Send liquid, specific gravity, gallons needed and site in the quote form below.
FAQ
How much does 275 gallons of water weigh?
About 2,294 lb (1,041 kg), plus the tote.
How much does a 330 gallon water tank weigh full?
About 2,752 lb of water plus the tank.
How much does a 1,000 gallon water tank weigh full?
About 8,340 lb of water plus the tank.
Sources
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Part of the topic guide
IBC Totes and Plastic Storage Tanks: Sizes, Uses and Buying