The calculation, without hidden assumptions
Kilowatt-hours and megajoules are both convenient large energy units. The bridge is exact: 1 kWh equals 3.6 MJ. Rather than creating separate pages for each direction, MAXScanner keeps the reciprocal conversion in one place and exposes the underlying joule and watt-hour values, making it useful for equipment energy, thermal-energy comparisons and technical documents that mix SI and electrical units.
How to use this calculator
Choose the direction you need.
Enter the known kWh or MJ value.
Read both main units plus Wh, kJ and J equivalents and verify the result with the reverse calculation.
Where people use it
- •Energy-report unit conversion
- •Comparing electrical and thermal energy figures
- •Engineering documents that mix kWh and MJ
Example: 5 kWh
5 kWh × 3.6 = 18 MJ. The same energy is 5,000 Wh, 18,000 kJ or 18,000,000 J.
What the result does not assume
- •This page converts energy units only. It does not calculate electricity cost, demand, heat-transfer efficiency or fuel consumption.
- •Do not confuse kW, a power rate, with kWh, an amount of energy accumulated over time.
Frequently asked questions
How many megajoules are in 1 kWh?+
Exactly 3.6 MJ.
How do I convert MJ back to kWh?+
Divide the megajoule value by 3.6.
Is kWh a power unit?+
No. kWh measures energy; kW measures power.
Semantic next steps
Continue the calculation
These links move to a different input, formula or project stage rather than a keyword variation of this page.
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Keep the result connected to the real job
MAXScanner keeps the formula and assumptions beside the result so you can verify the number before using it in a drawing, estimate, specification, worksheet or document. Where a supplier, manufacturer, drawing or applicable standard owns a requirement, that source remains authoritative.