Water heating cost estimator
Last reviewed 2026-09-12 by Jaken Energy editorial desk. Next review scheduled 2027-03-12.
Direct answer
Water heating energy ≈ gallons × 8.34 lb/gal × ΔT°F × 1 Btu/lb-°F. Convert Btu to kWh or therms and multiply by your rate.
Daily Btu = Gallons × 8.34 × (Hot temp − Cold temp)
Results
- Daily kWh (approx.)
- 330.0
- Monthly cost (approx.)
- $1,088.94
- Standby losses add 10–25% beyond theoretical load depending on tank insulation.
- Ozone or low-temp wash programs reduce gallons heated—adjust inputs accordingly.
Estimates only. No PII is collected. Results are not savings guarantees.
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