Tankless Water Heater (Electric) Energy Cost Calculator
On-demand water heater that heats water only when needed, eliminating standby losses.
Power Draw
18,000W
watts
Annual kWh
3,285
avg usage
Annual Cost
$427
avg national
CO₂/Year
2.35 tons
carbon impact
Tankless Water Heater (Electric) Cost Calculator
Customize usage and your state's electricity rate for accurate cost estimates.
Daily Cost
$1.17
Monthly Cost
$35.59
Annual Cost
$427
Lifetime Cost
$8,541
Energy Saving Opportunities
ENERGY STARAvailable
Save up to 20% vs standard models
~$85/year savings
Smart VersionAvailable
Smart scheduling saves 15% more energy
~$64/year savings
Energy Saving Tips
- ✓Provides hot water on demand with no standby loss
- ✓Flush annually to remove scale
- ✓Requires dedicated electrical circuit
Compare Alternatives
| Appliance | Watts | Annual kWh | Annual Cost |
|---|---|---|---|
| Tankless Water Heater (Electric) (current) | 18,000W | 3,285 | $427 |
| Electric Water Heater (Tank) | 4,500W | 4,927 | $641 |
| Heat Pump Water Heater | 500W | 1,095 | $142 |
Tankless Water Heater (Electric) Cost Summary
Purchase Price (one-time)$2,500
Annual Energy Cost (at 13¢/kWh)$427
Lifespan 20 years
Lifetime Energy Cost (energy only)$8,541
Total Cost of Ownership (purchase + energy)$11,041
Tankless Water Heater (Electric) Energy FAQ
Tankless Water Heater (Electric) Running Cost by City (top 100)
Electricity rates vary by city, so the cost to run a tankless water heater (electric) does too. See your local cost:
New York, NYLos Angeles, CAChicago, ILHouston, TXPhoenix, AZPhiladelphia, PASan Antonio, TXSan Diego, CADallas, TXSan Jose, CAAustin, TXJacksonville, FLFort Worth, TXColumbus, OHIndianapolis, INCharlotte, NCSan Francisco, CASeattle, WADenver, COWashington, DCNashville, TNOklahoma City, OKEl Paso, TXBoston, MAPortland, ORLas Vegas, NVDetroit, MIMemphis, TNLouisville, KYBaltimore, MDMilwaukee, WIAlbuquerque, NMTucson, AZFresno, CASacramento, CAKansas City, MOMesa, AZAtlanta, GAOmaha, NEColorado Springs, CORaleigh, NCLong Beach, CAVirginia Beach, VAMiami, FLOakland, CAMinneapolis, MNTulsa, OKBakersfield, CATampa, FLWichita, KSArlington, TXAurora, CONew Orleans, LACleveland, OHHonolulu, HIAnaheim, CALexington, KYStockton, CAHenderson, NVCorpus Christi, TXRiverside, CANewark, NJSaint Paul, MNSanta Ana, CACincinnati, OHIrvine, CAOrlando, FLPittsburgh, PASt. Louis, MOGreensboro, NCOyster Bay, NYJersey City, NJAnchorage, AKLincoln, NEPlano, TXDurham, NCBuffalo, NYChandler, AZChula Vista, CAToledo, OHMadison, WIGilbert, AZReno, NVLubbock, TXFort Wayne, INNorth Las Vegas, NVSt. Petersburg, FLIrving, TXLaredo, TXWinston-Salem, NCChesapeake, VAGlendale, AZGarland, TXScottsdale, AZArlington, VANorfolk, VANorth Hempstead, NYBoise, IDFremont, CASpokane, WA
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