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Hot-tub electricity cost

Separate covered maintenance from heating and jets, or price measured whole-spa energy in cold and warm seasons.

Covered maintenance only

$298.34 for your included days per year

365 days included. 0 other days are unmodeled, not assumed free. Fixed fees, water, chemicals and equipment costs are excluded.

Annual average / month
$24.86
Per included day
$0.82
Included annual energy
1,629.36 kWh

18.31 cents/kWh · US EIA residential benchmark, 2026-07

An average month at this daily use would cost $24.86 (365/12 days). This differs from spreading a partial year's cost over 12 months.

Covered standby only. This scenario uses your covered-maintenance input and excludes bathing, jets and additional refill or recovery heating. The named default is a normalized test value, not a forecast of outdoor use.

Energy in the entered daily schedule
Phase or loadkWh/day
Covered maintenance4.464
Heater during use/recovery0.000
Jets during use/recovery0.000
Other window loads0.000

Conditions note: Record the spa, cover, weather and water setting. This is a record for your estimate, not a numerical adjustment.

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The CSV includes the entered assumptions. Scenario URLs contain these inputs and may remain in browser history or hosting logs.

Your spa and energy basis

Use a representative multi-day reading divided by its days. The 5 kWh starting value is illustrative; use a circuit or whole-spa measurement.

The named 186 W value is a normalized test average with its cover. It already includes normal heating/circulation; do not apply another heater duty cycle.

Set aside this time for bathing and any additional recovery or refill heating. The remaining hours use the covered maintenance average. 0 means covered standby only.

Heating, jets and other use-window loads

Heater-only input. Do not enter a whole-circuit reading that includes pumps you add separately. 0 excludes heater energy.

Actual energized time, not thermostat availability. Must fit inside the use/recovery window.

Input watts for the entered pump, not horsepower. Add multiple jets only if your entered watts represent their combined draw.

Can overlap heater on-time, but cannot exceed the use/recovery window.

Controls, circulation, lights or other loads not already counted in heater or jets. Applied across the whole window; 0 excludes them.

Whole days from 0 to 365. Excluded days have no modeled energy; do not assume a filled spa can simply be switched off.

Enter representative whole-spa daily energy for two nonoverlapping periods. The labels do not supply weather or energy assumptions. A period with zero days is excluded.

Your measured daily average, including covered heating, circulation and actual bathing use.

Whole days in your chosen period.

Your measured daily average for the rest of your chosen schedule.

The two periods together can cover at most 365 days.

Up to 80 characters. Record ambient/water temperature, wind, insulation or cover condition and use frequency. This note does not change the arithmetic.

Electricity price

Used only when you choose your own rate. Include variable supply, delivery and taxes.

Find the variable rate on your bill

State averages include fixed-charge revenue spread across kWh. They give benchmark costs; avoided bill charges depend on your own variable rate. Compare full tariff costs.

Reset example

One matched spa-and-cover record

The CEC public database lists Watkins Manufacturing Co., Utopia Florence, with 186 W normalized standby. The record pairs the spa with Watkins cover 1931747C-XXX. Both the cover and spa enclosure are listed as insulated. A different cover or model revision may have different performance.

CEC record checked September 27, 2026
ModelWatkins Utopia Florence
Spa typeStandard spa
Rated voltage230 V
Tested cover1931747C-XXX
Fill volume333 US gallons
Rated volume360 US gallons
Normalized standby186 W
Database Add Date, as displayed08/04/2025

To find this record, open MAEDbS Advanced Search, choose Pool Products, Portable Electric Spas and Approved, then filter Model Number equals FLORENCE. Display the normalized standby, cover and insulation fields.

Normalized standby is a covered default-operation test metric. It is not the heater's nameplate draw, an annual whole-use measurement or a forecast for your weather. Multiplying 186 W by 24 hours gives 4.464 kWh for a full day at that test-average power; it does not add bathing or refill heat.

Cold weather, insulation and actual use

Record ambient and water temperatures, wind exposure, cover fit and condition, insulation and bathing frequency alongside your readings. Compare representative multi-day periods. A state electricity rate changes the price in this tool; it does not change heater runtime or estimate local weather.

In schedule mode, covered energy is average covered watts × (24 − use/recovery hours) ÷ 1,000. During the separate window, add heater watts × energized hours, jet watts × running hours, and other average watts × window hours, then divide by 1,000. Heater and jets can run together. Include refill/recovery in that window if you want it counted.

Measured modes use whole-spa readings directly. Cold/warm annual energy is each daily reading multiplied by its included days, then summed. No heater, standby or jet estimate is added again. Initial heating or unusual use is included only if your readings or schedule contain it. These calculations do not determine safe temperatures, sanitation, freeze protection or winterization.

Sources

Usage assumptions (hours a day, season) are ours and listed on the methodology page. Found an error? Tell us.

Pool and outdoor collection · Pool-pump schedules · Compare tariff periods and fixed fees

Start a household inventory with the original covered-standby example. Add active operation separately; this link does not copy edited inputs.