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Water Heating Energy and Time Calculator
Estimate sensible heating energy,input electricity,time and cost for liquid water.
Water volume (L), Initial water temperature (°C), Target water temperature (°C), Heater electrical power (kW), Heating efficiency (%), Electricity price per kWh
JSON
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the labelled values using the displayed units and explicit assumptions.
- Choose Calculate result and review the complete report and any undefined or no-solution states.
- Choose Download result to save the complete JSON. Reset clears the result and restores example controls.
Examples
Water volume (L): 100
Initial water temperature (°C): 15
Target water temperature (°C): 60
Heater electrical power (kW): 2
Heating efficiency (%): 90
Electricity price per kWh: 0.3
Limitations
- Nonnegative volume L,initial/target temperature0–100°C with target>=initial;positive heater kW,efficiency>0–100%,nonnegative price/kWh. Fixed density1kg/L,heat capacity4.186kJ/(kg*K);no boiling/phase change,heat loss after heating,thermostat cycling or equipment safety assessment.
- Scalar controls accept explicit finite decimal syntax;positive values normally1e-12–1e12,nonnegative0–1e12 unless a narrower range is stated. JSON numeric rows use finite IEEE754 values within their stated bounds. Derived counts above1billion and nonfinite results refuse. Combined input<=400000UTF8 bytes;complete JSON<=4MiB. All processing stays in your browser.
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