Water Heater Recovery Time Calculator
Estimate how long an electric tank takes to reheat a full volume of water from cold.
Compare Your Options And Get Clear Answers
Estimate how long an electric tank takes to reheat a full volume of water from cold.
Water Heater Recovery Time 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 | kW | Target C | Hours |
|---|---|---|---|
| 80 | 2 | 60 | 2.1 hours |
| 150 | 3 | 60 | 2.7 hours |
| 210 | 3 | 60 | 3.7 hours |
| 300 | 4.5 | 60 | 3.6 hours |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Water Heater Recovery Calculator FAQ
Answers to common questions about this calculator.
The time a heater needs to bring a full tank back up to its set temperature.
Use a higher power element or a smaller tank for the same demand.
Time = litres x 4.186 x temperature rise / 3,600 / (power x efficiency).
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.