BTU to kW Converter

BTU/h to kW conversion chart

Calculated with the formula above; filter or export as CSV.

Filter chart

BTU/h to kW conversion chart
BTU/h	kW	TR
5000	1.46535535	0.41666667
6000	1.75842642	0.5
8000	2.34456856	0.66666667
9000	2.63763963	0.75
10000	2.9307107	0.83333333
12000	3.51685284	1.0
15000	4.39606605	1.25
18000	5.27527926	1.5
20000	5.8614214	1.66666667
24000	7.03370568	2.0
30000	8.79213211	2.5
36000	10.55055853	3.0
40000	11.72284281	3.33333333
48000	14.06741137	4.0
60000	17.58426421	5.0
80000	23.44568561	6.66666667
100000	29.30710702	8.33333333
120000	35.16852842	10.0
150000	43.96066053	12.5
200000	58.61421403	16.66666667
250000	73.26776754	20.83333333
500000	146.53553509	41.66666667
1000000	293.07107017	83.33333333

Formula and method

kW = BTU/h × 0.000293071 BTU/h = kW × 3,412.141633128 Multiply by the source unit’s SI factor to get W, then divide by the target unit’s SI factor.

Worked example

12,000 BTU/h × 0.000293071 = 3.5169 kW.

Assumptions and limits

Uses the International Table Btu (1,055.05585262 J). Air-conditioner “BTU” ratings are really BTU per hour.
Results show up to 4 decimals; Copy and CSV keep more digits.

Frequently asked questions

How many kW are in 1 BTU/h?

1 BTU/h = 0.000293071 kW. The factor follows from the SI definitions: 1 hp = 550 ft·lbf/s = 745.69987 W; 1 BTU/h = 1,055.05585262 J ÷ 3,600 s.

How do I convert kW back to BTU/h?

Multiply by 3,412.141633128 (or divide by 0.000293071), or simply switch “From unit” to kW. For example 10 kW = 34,121.4163 BTU/h.

How many tons is a 12,000 BTU air conditioner?

12,000 BTU/h is exactly one ton of refrigeration, about 3.517 kW of cooling. The ton comes from melting one short ton of ice in 24 hours. Compare units by their rated cooling capacity in kW or BTU/h, not by electrical input power.

References

BTU to kW Converter practical guide and common questions

What does BTU to kW Converter calculate?

Convert BTU per hour to kW, tons of refrigeration, hp and PS for air conditioners, heat pumps and boilers, with a chart of common capacities. Conversion runs in your browser; factors are from NIST SP 811. kW = BTU/h × 0.000293071 BTU/h = kW × 3,412.141633128 Multiply by the source unit’s SI factor to get W, then divide by the target unit’s SI factor.

When is this useful?

12,000 BTU/h × 0.000293071 = 3.5169 kW.

How do I enter the inputs?

Enter the inputs for BTU to kW Converter: Value, From unit. Calculate, check the units and assumptions, then copy or download the results.

How should I interpret the results?

Uses the International Table Btu (1,055.05585262 J). Air-conditioner “BTU” ratings are really BTU per hour. Results show up to 4 decimals; Copy and CSV keep more digits.

Where are my inputs processed?

BTU to kW Converter runs in this browser. Inputs are not uploaded to a calculation server; copying and CSV download require your action. The existing site analytics and advertising still load.