Heating Fuel Cost Comparison Calculator
Cost per kWh of delivered heat for any two fuels, efficiencies included.
Heat delivered, not fuel bought, is what you compare. At ₹8/kWh a COP-3 heat pump beats ₹60/kg LPG (₹2.67 vs ₹4.83 per kWh of warmth).
Formula
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Heating Fuel Cost Comparison Calculator is a free fuel cost comparison for HVAC designers, technicians and energy auditors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Heating Fuel Cost Comparison Calculator
Cost per kWh of delivered heat for any two fuels, efficiencies included. The calculation implements cost/kWh_heat = price ÷ (kWh per unit × η) (Fuel calorific values — IS 1448 / engineering tables). Heat delivered, not fuel bought, is what you compare. At ₹8/kWh a COP-3 heat pump beats ₹60/kg LPG (₹2.67 vs ₹4.83 per kWh of warmth).
How to use Heating Fuel Cost Comparison Calculator
- 1Enter Fuel A price per unit (e.g. ₹60/kg LPG, ₹8/kWh electric, ₹95/L oil).
- 2Enter Fuel A energy per unit in kWh/unit (LPG 13.8/kg · NG 10.6/m³ · oil 10.4/L · electric 1).
- 3Enter System A efficiency/COP in %.
- 4Enter Fuel B price per unit.
- 5Read Fuel A heat cost, Fuel B heat cost instantly — no submit button needed.
Why use Heating Fuel Cost Comparison Calculator?
- ✓Implements the standard formula — cost/kWh_heat = price ÷ (kWh per unit × η)
- ✓Reference cited on-page: Fuel calorific values — IS 1448 / engineering tables
- ✓Built-in engineering verdict flags out-of-range results instantly
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Heating Fuel Cost Comparison Calculator use?+
It computes cost/kWh_heat = price ÷ (kWh per unit × η), per Fuel calorific values — IS 1448 / engineering tables. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Heat delivered, not fuel bought, is what you compare. At ₹8/kWh a COP-3 heat pump beats ₹60/kg LPG (₹2.67 vs ₹4.83 per kWh of warmth).
Is this based on ASHRAE methods?+
The calculations follow the standard ASHRAE/ISHRAE formulations cited under the result, simplified where industry practice does the same. For permit-grade design, confirm with the full code procedure.
Is the Heating Fuel Cost Comparison Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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