Jacuzzi J-325: measurements and water volume
Summed up
Count on about 360 gallons in the Jacuzzi J-325. The shell measures 84 by 76 inches with 34 inch walls, seats 5 adults, and a full tub with bathers weighs on the order of 4,614 lb.
Balancing 360 gallons
Ready-to-use quantities for this specific volume, all in ounces by weight.
| To do this | Chemical | Amount |
|---|---|---|
| Raise total alkalinity +10 ppm | sodium bicarbonate | 0.86 oz |
| Raise free chlorine +3 ppm | dichlor granules | 0.26 oz |
| Raise bromine +3 ppm | bromine granules | 0.24 oz |
| Chlorine shock (+10 ppm) | dichlor | 0.86 oz |
Add in small steps with the pump running, wait, then retest before adding more. Never mix chemicals together, and always follow your product label, which wins over any calculator.
Jacuzzi J-325 spec sheet
- Water capacity360 gal
- TypeHard-shell
- Dimensions (in)84 x 76 x 34
- Footprint44.3 ft²
- Rated seats5
- Gallons per seat72
- Water weight3,002 lb
- Empty weight687 lb
- Filled + 5 adults4,614 lb
- Standby heat (est.)8.1 kWh/day
- Heat-up 55 to 102 F (est., 4 kW)10.3 h
Where a row says estimated, it is the site's formula at 102 F / 50 F with an average cover, and the heat-up ignores ongoing losses.
Class context
Of the 54 hard-shell tubs on record here, half hold under 383 gallons and half over; the middle body is 88 inches wide. This unit takes 6 percent less water than that mark in a frame 4 inches narrower than average, leaving 72 gallons to each rated bather.
From dry to loaded: the weights
Support requirements start from 4,614 lb: that is 687 lb of hardware, 3,002 lb of water, and 5 adults near 925 lb combined, resting on about 44.3 square feet (104 psf). Work out any tub on the filled weight calculator.
Your bill, ballparked
Heat replacement for this water volume averages 8.1 kWh a day under the stated conditions (102 F target, 50 F ambient, average cover). Translated to dollars: $42 a month at $0.17/kWh, with $30 to $62 covering most utilities. Model your own rate and climate on the running cost calculator.
Making room for it
Carve out more than the footprint (44.3 square feet of tub alone): steps, a cover lifter, and service access all claim margin around it. Feed it with a dedicated 240 volt circuit installed by an electrician and confirm the base is rated for 4,614 lb before the hose goes in.
Source
The 360 gallon figure is from the manufacturer's published specification: jacuzzipartners.com. Manufacturer handbook. Average fill 360 gal; full spa volume 440 gal. Seats 4-5. J-300 Collection. Capacities vary with how high you fill and with seats and footwell; confirm against your own manual or a metered fill when precision matters.