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BTU to kW Calculator

Convert gas energy units instantly — BTU/hr, kW, MJ/h and kcal/h — with gas consumption in m³/h and kg/h.

Convert Gas Energy Units

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Frequently Asked Questions

How do I convert BTU/hr to kW?

Multiply BTU/hr by 0.000293071 to get kW. For example, 25,000 BTU/hr × 0.000293071 = 7.33 kW. Alternatively, divide BTU/hr by 3,412 for a quick estimate.

What is the difference between kW and MJ/h for gas appliances?

1 kW = 3.6 MJ/h. Gas appliance ratings in NZ/AU use MJ/h (e.g. "50 MJ/h input"), while HVAC equipment often uses kW. Multiply kW by 3.6 to get MJ/h, or divide MJ/h by 3.6 to get kW.

How much natural gas does a 50 MJ/h appliance use?

Natural gas has a calorific value of approximately 38.5 MJ/m³. A 50 MJ/h appliance consumes 50 / 38.5 ≈ 1.3 m³/h of natural gas.