BTUs (Btu)

BTUs as a conversion hub: 6 direct pairs, all with the exact factor on the page.

Definition1 Btu = 1.055056 kJ exactly

CategoryEnergy Converter

Pairs from here6

Energy Converter

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BTUs converted to every other unit

Btu	J	kJ	cal	kcal	Wh	kWh
1 Btu	1,055.06	1.055056	252.164	0.2521644	0.29307107	0.0002930711
2 Btu	2,110.11	2.110112	504.329	0.5043288	0.58614214	0.0005861421
5 Btu	5,275.28	5.275279	1,260.82	1.260822	1.465355	0.0014653554
10 Btu	10,550.56	10.550559	2,521.64	2.521644	2.930711	0.0029307107
20 Btu	21,101.12	21.101117	5,043.29	5.043288	5.861421	0.0058614214
50 Btu	52,752.79	52.752793	12,608.22	12.60822	14.653554	0.01465355
100 Btu	105,505.59	105.506	25,216.44	25.21644	29.307107	0.02930711

All conversions starting from Btu

Btu to J Btu to kJ Btu to cal Btu to kcal Btu to Wh Btu to kWh

Questions

How do I convert from BTUs?

Pick the target unit from the table on this page, or open the dedicated pair page — each one carries a converter, a table of common values and the exact factor.

Is BTU exact or approximate?

The factor shown (1 Btu = 1.055056 kJ) is fixed by definition, so conversions are exact rather than measured.

What is BTU used for?

BTUs as used in practical measurements