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Gas vs Electric Heating Cost in Hawaii

NOAA's 1991–2020 normals give Hawaii 0 heating degree-days, so this calculator's space-heating cost for a 2,000 sq ft house is $0.00 a year on gas, resistance heat or a heat pump. Per unit of heat, Hawaii's prices still rank them: $39.08 per MMBtu from a heat pump, $54.89 from gas at $5.05/therm and $140.68 from resistance heat at 48.0¢/kWh.

An electric baseboard heater below a living room window.
An electric baseboard heater below a living room window.

State data

What Hawaii pays

Electricity
48.0¢/kWhEIA Electric Power Monthly, table 5.6.A · EIA, July 2026 (data as of 2026-09-28)
Natural gas
$5.05/thermEIA, residential natural gas price ($/Mcf ÷ 10.37) · EIA 2025 annual average (data as of 2026-09-28)
Heating degree-days
0 °F-days (base 65 °F)NOAA CPC, 1991–2020 normals
Climate zone
1 (IECC 2021)DOE/PNNL · heat pump seasonal COP used: 3.6

At 48.0¢/kWh, Hawaii has the highest residential electricity rate among the 50 states and DC. At $5.05/therm, Hawaii is in the $2-and-up band for residential gas on this site, 241% above the US average of $1.48/therm. NOAA's 1991–2020 normals give Hawaii 0 heating degree-days, so this calculator's space-heating load there is zero.

Prices are statewide averages. Type the rate and gas price from your own bill into the calculator above to replace them.

Gas vs electric heat

B04

Scenario A

Sets the electricity rate. Pick US average if you're not sure.

$/kWh

From EIA for Hawaii. Use the rate on your bill if you know it.

Rate used: 48.0¢/kWh · Hawaii · EIA, July 2026 · gas $5.05/therm (EIA 2025 annual) · 0 heating degree-days · climate zone 1 (data as of 2026-09-28) ·

sq ft

On the furnace label: 0.80 older, 0.90–0.98 condensing.

No space-heating load in Hawaii

$0.00/ year on every option

Hawaii has 0 heating degree-days in the NOAA 1991–2020 normals, so this model's space-heating load is zero: every option costs $0.00 a year. Per MMBtu of heat, electric resistance costs $140.68 and gas furnace $54.89.

Yearly heating load
0.0 MMBtu
Electric resistance, $ per MMBtu
$140.68
Gas furnace, $ per MMBtu
$54.89
Electric resistance, per year
$0.00
Gas furnace, per year
$0.00
Difference per year (Gas furnace − Electric resistance)
$0.00
Seasonal heat pump COP used
3.6
Prices used
electricity 48.0¢/kWh · gas $5.05/therm · propane $5.00/gal · oil $5.00/gal
Heat pump, per year (for reference)
$0.00

Cost by month, in season only

  1. Jan: $0.00
  2. Feb: $0.00
  3. Mar: $0.00
  4. Apr: $0.00
  5. May: $0.00
  6. Jun: $0.00
  7. Jul: $0.00
  8. Aug: $0.00
  9. Sep: $0.00
  10. Oct: $0.00
  11. Nov: $0.00
  12. Dec: $0.00

The yearly cost spread across the months using a typical heating degree-day pattern from NOAA 1991–2020 normals. Months outside the season show $0.

Estimate. Formula and sources are under “How it works”. Change any input; the result updates as you type.

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2026 note: The federal 25C and 25D tax credits ended for installations after Dec 31, 2025. Our numbers use 2026 rules. State rebates, HEAR/HOMES programs and utility programs may still apply.

Worked example

Worked example: 2,000 sq ft in Hawaii

With 0 heating degree-days in the NOAA normals, the 2,000 sq ft example in Hawaii has a heating load of 0 MMBtu, so the yearly cost is $0.00 on every option. The per-unit prices still apply to any heat you do use: gas at $5.05/therm in a 92% furnace delivers heat at $54.89 per MMBtu, resistance heat at 48.0¢/kWh at $140.68, and a heat pump at seasonal COP 3.6 at $39.08.

Load = sq ft × 0.35 × heating degree-days × 24 ÷ 1,000,000. Gas $/MMBtu = $/therm ÷ 0.1 ÷ 0.92. Resistance $/MMBtu = $/kWh × 293.07. Heat pump = resistance ÷ COP.

Questions

FAQ

Which is cheaper in Hawaii, gas or electric heat?

With 0 heating degree-days, the yearly space-heating cost in Hawaii is $0.00 on all three options in this model. Per MMBtu of heat, a heat pump ($39.08) costs less than gas ($54.89) and resistance heat ($140.68).

How much gas does a furnace use in Hawaii?

With 0 heating degree-days in the NOAA 1991–2020 normals, the calculator's heating load for Hawaii is 0, so a furnace would burn no gas for space heating in this model. Water heating and cooking are not part of this estimate.

Electric furnace vs gas furnace cost in Hawaii?

An electric furnace is resistance heat. At 48.0¢/kWh, its heat costs $140.68 per MMBtu in Hawaii, against $54.89 from a 92% gas furnace at $5.05/therm. With 0 heating degree-days, the calculator's yearly heating cost is $0.00 for both.

Compare

States with a similar electricity rate

The 4 states whose electricity rate is closest to Hawaii's 48.0¢/kWh:

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