Cost to Run a 3,000-watt hot tub heater for 24 hours
Running a 3,000-watt hot tub heater for 24 hours uses 72 kWh and costs $12.60 at $0.175/kWh. Do that every day and it adds up to $378.00 a month.
Calculate your own cost
- Per hour
- $0.5253 kWh
- Per day
- $12.6072 kWh
- Per week
- $88.20504 kWh
- Per month (30 days)
- $378.002,160 kWh
- Per year
- $4,599.0026,280 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 3,000-watt hot tub heater cost per hour?
At $0.175/kWh, it costs $0.525 per hour. The maths: 3,000 W ÷ 1,000 = 3 kWh per hour, × $0.175 = $0.525.
How much does it cost per month?
Used 24 hours a day for 30 days, it costs about $378.00 per month and uses 2,160 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
72 kWh per day, 2,160 kWh per month and 26,280 kWh per year at 24 hours a day. A kWh is one kilowatt (1,000 W) used for one hour. It is the unit on your electricity bill.
How can I lower the cost?
Keep the insulated cover fitted when not in use and check for heat loss. Check your bill for the exact rate and enter it above.
Does my electricity rate change the answer?
Yes, a lot. At 10¢ per kWh the monthly cost is $216.00 and at 30¢ it is $648.00. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 3 kWh | $0.525 | $15.75 | $191.63 |
| 2 hours | 6 kWh | $1.05 | $31.50 | $383.25 |
| 3 hours | 9 kWh | $1.58 | $47.25 | $574.88 |
| 4 hours | 12 kWh | $2.10 | $63.00 | $766.50 |
| 5 hours | 15 kWh | $2.63 | $78.75 | $958.13 |
| 6 hours | 18 kWh | $3.15 | $94.50 | $1,149.75 |
| 7 hours | 21 kWh | $3.68 | $110.25 | $1,341.38 |
| 8 hours | 24 kWh | $4.20 | $126.00 | $1,533.00 |
| 9 hours | 27 kWh | $4.73 | $141.75 | $1,724.63 |
| 10 hours | 30 kWh | $5.25 | $157.50 | $1,916.25 |
| 11 hours | 33 kWh | $5.78 | $173.25 | $2,107.88 |
| 12 hours | 36 kWh | $6.30 | $189.00 | $2,299.50 |
| 13 hours | 39 kWh | $6.83 | $204.75 | $2,491.13 |
| 14 hours | 42 kWh | $7.35 | $220.50 | $2,682.75 |
| 15 hours | 45 kWh | $7.88 | $236.25 | $2,874.38 |
| 16 hours | 48 kWh | $8.40 | $252.00 | $3,066.00 |
| 17 hours | 51 kWh | $8.93 | $267.75 | $3,257.63 |
| 18 hours | 54 kWh | $9.45 | $283.50 | $3,449.25 |
| 19 hours | 57 kWh | $9.98 | $299.25 | $3,640.88 |
| 20 hours | 60 kWh | $10.50 | $315.00 | $3,832.50 |
| 21 hours | 63 kWh | $11.03 | $330.75 | $4,024.13 |
| 22 hours | 66 kWh | $11.55 | $346.50 | $4,215.75 |
| 23 hours | 69 kWh | $12.08 | $362.25 | $4,407.38 |
| 24 hours | 72 kWh | $12.60 | $378.00 | $4,599.00 |
How we worked it out
- Energy per hour: 3,000 W ÷ 1,000 = 3 kWh
- Cost per hour: 3 kWh × $0.175 = $0.525
- Cost per day: × 24 hours = $12.60
- Month and year: × 30 days = $378.00, × 365 days = $4,599.00
What it costs in different places
Same 3,000-watt hot tub heater, 24 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $378.00 |
| California | $0.32 | $691.20 |
| Texas | $0.155 | $334.80 |
| New York | $0.25 | $540.00 |
| Florida | $0.155 | $334.80 |
| Illinois | $0.17 | $367.20 |
| Pennsylvania | $0.18 | $388.80 |
| Ohio | $0.17 | $367.20 |
| Washington | $0.115 | $248.40 |
About hot tub heater running costs
Hot tubs use electricity for both water heating and circulation. Heater duty depends heavily on insulation, cover use, temperature and weather.
Typical sizes: 3,000 W, 4,000 W, 5,000 W, 6,000 W.
How to spend less: Keep the insulated cover fitted when not in use and check for heat loss.
What this estimate assumes
- The appliance draws its full stated wattage the whole time it is on. Real units with a thermostat cycle off and cost less.
- Wattage is the typical label value, not a measured value. Check the label on your own appliance.
- The rate is an approximate residential average. Your bill may include fixed fees, tiers or time-of-use pricing. Edit the rate above.
- A month is 30 days and a year is 365 days.