Skip to content

Seasonal HVAC Electricity Cost Calculator

Estimate heating and cooling electricity from documented thermal loads, equivalent seasonal hours, seasonal efficiency ratings and an entered tariff.

Use this result well

Inputs that matter
Reference cooling load (Btu/h), Cooling equivalent full-load hours, Cooling seasonal rating (Btu/Wh), Reference heating load (Btu/h), and 4 more
Output to expect
Seasonal heating and cooling costs
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
Was this tool helpful?

Related Tools

Tools you might need next

Heat Pump and Gas Furnace Operating Cost Calculator

Compare the same entered heating demand using explicit equivalent full-load hours, seasonal heat-pump efficiency, furnace AFUE, tariffs and other annual costs.

Recommended next stepHVAC
Home Project Cost and Lifetime Comparison Calculator

Build an installed quote, compare lifetime costs and calculate material packs. Separate payment-day cash from later reimbursements using your project records.

Recommended next stepHome Improvement
Electricity Cost Calculator

Estimate appliance kWh and cost by day, week, average month, current calendar month, and year, with an optional regional CO₂ factor.

Recommended next stepUnit Price

Reference & details

How it works

Seasonal heating and cooling costs

Estimate electricity from entered reference thermal loads and equivalent full-load hours, divided by seasonal efficiency ratings in Btu/Wh. Equivalent hours represent total seasonal delivered energy divided by that reference load; they are not raw thermostat runtime or a local weather forecast.

Cooling kWh = cooling Btu/h × equivalent hours ÷ (SEER or SEER2 × 1000); heating kWh = heating Btu/h × equivalent hours ÷ (HSPF or HSPF2 × 1000); cost = kWh × tariff.

Updated: September 2026

Example Scenarios

The built-in example supplies labeled assumptions. Replace them with your own records before making a decision.

→ $1,770.00

FAQ

No. They equal seasonal delivered thermal energy divided by the reference load. Seasonal ratings use Btu per watt-hour; use a consistent test basis and do not substitute COP or multiply by 3,412.

Use your own records on the units and period shown. Enter explicit zeros for absent amounts, verify current terms and record the dates and assumptions.

Choose Save planning case for local history. Copy MD includes current inputs, notes and interpretation; Download CSV exports the result breakdown. Keep a portable copy separately.

About Seasonal HVAC Electricity Cost Calculator

Estimate electricity from entered reference thermal loads and equivalent full-load hours, divided by seasonal efficiency ratings in Btu/Wh. Equivalent hours represent total seasonal delivered energy divided by that reference load; they are not raw thermostat runtime or a local weather forecast.