Jacuzzi hot tub sizes and water capacity
Jacuzzi's 19 listed models hold from 340 to 520 gallons. Find yours below for its water volume, dimensions, and seating, then size your chemicals to that figure.
| Model | Type | Gallons | Dimensions (in) | Seats |
|---|---|---|---|---|
| J-425 | Hard-shell | 340 | 76 x 87 x 34 | 5 |
| J-235 | Hard-shell | 360 | 84 x 84 x 36 | 6 |
| J-245 | Hard-shell | 360 | 84 x 84 x 36 | 7 |
| J-325 | Hard-shell | 360 | 84 x 76 x 34 | 5 |
| J-335 | Hard-shell | 360 | 84 x 84 x 36 | 5 |
| J-465 | Hard-shell | 360 | 88 x 88 x 39 | 5 |
| J-345 | Hard-shell | 370 | 84 x 84 x 36 | 6 |
| J-LX | Hard-shell | 390 | 84 x 84 x 36 | 7 |
| J-LXL | Hard-shell | 390 | 84 x 84 x 36 | 7 |
| J-355 | Hard-shell | 400 | 84 x 91 x 38 | 6 |
| J-275 | Hard-shell | 420 | 90 x 90 x 36.5 | 6 |
| J-365 | Hard-shell | 440 | 84 x 91 x 38 | 7 |
| J-575 | Hard-shell | 445 | 91 x 91 x 37.5 | 6 |
| J-470 | Hard-shell | 450 | 91 x 91 x 39 | 7 |
| J-280 | Hard-shell | 460 | 90 x 90 x 36.5 | 7 |
| J-375 | Hard-shell | 470 | 91 x 91 x 38 | 6 |
| J-480 | Hard-shell | 480 | 94 x 94 x 39 | 6 |
| J-385 | Hard-shell | 500 | 91 x 91 x 38 | 7 |
| J-495 | Hard-shell | 520 | 94 x 94 x 39 | 9 |
Why your gallons matter
Every chemical dose is sized from your water volume, so the gallons figure is the one number to get right before you balance the water. Open any model above for the exact doses for its volume, or take the number to the dosing calculator. Capacities are the maker's stated figures; confirm against your own manual when precision matters.