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Gas vs Electric Operating Cost Calculator

Compare simple annual water heating cost from user-entered gallons, temperatures, rates, and efficiency assumptions.

Screening estimate only.This worksheet uses only the values you enter. A licensed plumber's sizing, code review, and installation plan are authoritative.

Operating cost worksheet

Compare annual cost from your rates

This simple comparison converts your daily hot-water use into heating energy, then applies the utility rates and efficiency values you enter.

Annual cost comparison appears here.Change any input to update the comparison.

Formula note: gallons per day x 8.34 x temperature rise estimates daily Btu. Electric cost uses kWh. Gas cost uses therms. Efficiency and rates come from your inputs.