📊 Comparison matrix

Energy conversion matrix

Every pair of energy units in one table. Rows are the from unit, columns the to unit. Click any cell to open the full converter.

How to read: each cell shows how many column-unit equal 1 row-unit. For example, in length: 1 km → 1000 m. The diagonal cells (—) are the same unit and not conversions.

From \ To	JJoule	kJKilojoule	MJMegajoule	kWhKilowatt-Hour	WhWatt-Hour	calCalorie	kcalKilocalorie	BTUBritish Thermal Unit	eVElectronvolt	thmTherm
JJoule	—	0.001	1.0000e-6	2.7778e-7	0.0002778	0.239	0.000239	0.0009478	6.2415e18	9.4782e-9
kJKilojoule	1,000	—	0.001	0.0002778	0.2778	239.006	0.239	0.9478	6.2415e21	9.4782e-6
MJMegajoule	1,000,000	1,000	—	0.2778	277.778	239,005.74	239.006	947.817	6.2415e24	0.009478
kWhKilowatt-Hour	3,600,000	3,600	3.6	—	1,000	860,420.65	860.421	3,412.14	2.2469e25	0.03412
WhWatt-Hour	3,600	3.6	0.0036	0.001	—	860.421	0.8604	3.41214	2.2469e22	3.4121e-5
calCalorie	4.184	0.004184	4.1840e-6	1.1622e-6	0.001162	—	0.001	0.003966	2.6114e19	3.9657e-8
kcalKilocalorie	4,184	4.184	0.004184	0.001162	1.16222	1,000	—	3.96567	2.6114e22	3.9657e-5
BTUBritish Thermal Unit	1,055.06	1.05506	0.001055	0.0002931	0.2931	252.164	0.2522	—	6.5851e21	1.0000e-5
eVElectronvolt	1.6022e-19	1.6022e-22	1.6022e-25	4.4505e-26	4.4505e-23	3.8293e-20	3.8293e-23	1.5186e-22	—	1.5186e-27
thmTherm	105,505,585.3	105,505.59	105.506	29.3071	29,307.11	25,216,440.08	25,216.44	100,000	6.5851e26	—

How to use this table

Find your starting unit in the left column (From). Move across that row to the target unit (To) at the top. The cell where they meet is the conversion factor — the number of target units equal to one starting unit.

Click any cell to open the full converter for that pair. Click any unit abbreviation (row or column header) to open that unit's encyclopedia page.

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