What does this tool calculate?
Convert energy among joules, kilojoules, calories, kilocalories, Wh, kWh, BTU, and eV.
Energy Conversion Calculator
Convert energy among joules, kilojoules, calories, kilocalories, Wh, kWh, BTU, and eV.
Enter conversion details
Complete the fields below, then select Calculate.
About this converter
How to use Energy Conversion Calculator, plus the formulas and logic behind the results.
Tool description
Convert energy among joules, kilojoules, calories, kilocalories, Wh, kWh, BTU, and eV. It provides an immediate educational result using the definitions shown below.
How to use
- Enter the value or text you want to convert.
- Choose the applicable units, direction, or mode.
- Select Calculate to produce the result.
- Review the formula and note before using the result.
Formulas & reference
base joules = input × source factoroutput = base joules ÷ target factor
Calculation logic
All energy values are normalized to joules using standard factors before conversion.
The thermochemical calorie (4.184 J) and international-table BTU approximation are used.
Energy Conversion Calculator FAQ
Common questions about this conversion and how to interpret the result.
How do I use this calculator?
Complete the input fields, choose the required options, and select Calculate.
Which formula is used?
base joules = input × source factor
Are results rounded?
Calculations use full floating-point precision; displayed values are formatted for readability.
Can I enter decimal values?
Yes. Numeric fields accept decimal values unless a field specifically represents text.
Is the result authoritative?
No. It is an educational estimate; verify critical engineering, billing, health, or safety work independently.