Hot Water Storage Tanks - Capacities vs. Dimensions

Dimensions and capacities of hot-water storage tanks. Find the hot-water storage capacity in gallons based on tank diameter and length.

Tank Diameter (inches)Tank Length (ft): 1Tank Length (ft): 2Tank Length (ft): 3Tank Length (ft): 4Tank Length (ft): 5Tank Length (ft): 6Tank Length (ft): 7Tank Length (ft): 8Tank Length (ft): 9Tank Length (ft): 10
20163248668298114131147163
2220406080100120140160180200
2424487296120144168192216240
303774110147184220257294330367
3653106159212265317370423476529
4272144216288360432504576648720

Conversion Factors

  • 1 ft (foot) = 0.3048 m
  • 1 in (inch) = 25.4 mm = 2.54 cm = 0.0254 m
  • 1 Gallon (U.S.) = 3.785×10⁻³ m³ = 3.785 dm³ (liter)