Water Heater Annual Energy Cost Calculator
Estimate the yearly running cost of a hot water cylinder or tank from daily use, temperatures and efficiency.
Compare Your Options And Get Clear Answers
Estimate the yearly running cost of a hot water cylinder or tank from daily use, temperatures and efficiency.
Water Heater Annual Energy Cost Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
Water Quick Guide
Typical values for reference.
| Litres/day | Stored C | Efficiency % | Annual cost |
|---|---|---|---|
| 60 | 55 | 95 | £460.38 |
| 150 | 55 | 95 | £967.00 |
| 250 | 55 | 95 | £1,529.91 |
| 400 | 55 | 95 | £2,374.27 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Water Heater Annual Calculator FAQ
Answers to common questions about this calculator.
A typical household spends about £150 to £500 a year depending on use and fuel.
Yes, but keep stored water at 55 C or above to limit Legionella risk.
Energy = litres x 4.186 x temperature rise / 3,600 / efficiency + standing loss; cost = kWh x price.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.