Joule to Electronvolt Converter
Energy · unit-converter
Convert Joule to Electronvolt with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Joule (j)
To: Electronvolt (ev)
About Joule
The joule is the SI unit of energy. All other units here are converted through fixed joule equivalents.
About Electronvolt
The electronvolt is the energy change of one elementary charge across 1 V: 1 eV ≈ 1.602176634×10⁻¹⁹ J (exact by SI definition). Used in particle physics and chemistry.
How to convert joules to electronvolts
1 joule is equal to 6.24150907e+18 electronvolt when both are expressed in joule-equivalents:
1 j = (1 J ÷ 1.602176634e-19 J) ev = 6.24150907e+18 ev
Each joule is defined as 1 J and each electronvolt as 1.602176634e-19 J in this tool, so one j equals 1 ÷ 1.602176634e-19 ev = 6.24150907e+18 ev.
Let d(j) be the numeric amount in Joule (j), and d(ev) the amount in Electronvolt (ev). Then:
d(ev) = d(j) × (1 / 1.602176634e-19)
Equivalently, divide by how many j fit into one ev (joules per ev divided by joules per j):
d(ev) = d(j) ÷ 1.60217663e-19
Or: electronvolt = joule ÷ 1.60217663e-19
Examples
Example #1: Convert 1 j to electronvolt
1 j = 1 j × (1/1.602176634e-19) ev = 6241509074460000256 ev
1 j = 1 j ÷ 1.60217663e-19 = 6241509074460000256 ev
Example #2: Convert 10 j to electronvolt
10 j = 10 j × (1/1.602176634e-19) ev = 62415090744600002560 ev
10 j = 10 j ÷ 1.60217663e-19 = 62415090744600002560 ev
Summary
To convert Joule to Electronvolt, multiply the value in j by the ratio of joules per j divided by joules per ev. Equivalently: value_ev = value_j × (1 / 1.602176634e-19). Numerically, 1 j equals 6241509074460763000 ev.
Relationship context
You are converting between SI energy (joules) (Joules) and atomic-scale energy (electronvolts) (Electronvolts). All values are mapped through joules first. The numeric factor is 6.241509e+18.
Conversion tables
| Joule (j) | Electronvolt (ev) |
|---|---|
| 0.1 | 624,150,907,446,000,000 |
| 1 | 6,241,509,074,460,000,256 |
| 2 | 12,483,018,148,899,999,744 |
| 3 | 18,724,527,223,400,001,536 |
| 4 | 24,966,036,297,799,999,488 |
| 5 | 31,207,545,372,300,001,280 |
| 6 | 37,449,054,446,800,003,072 |
| 7 | 43,690,563,521,199,996,928 |
| 8 | 49,932,072,595,699,998,720 |
| 9 | 56,173,581,670,100,000,768 |
| Joule (j) | Electronvolt (ev) |
|---|---|
| 10 | 62,415,090,744,600,002,560 |
| 20 | 124,830,181,489,000,005,632 |
| 30 | 187,245,272,233,999,990,784 |
| 40 | 249,660,362,978,000,011,264 |
| 50 | 312,075,453,722,999,980,032 |
| 60 | 374,490,544,467,999,981,568 |
| 70 | 436,905,635,211,999,969,280 |
| 80 | 499,320,725,956,999,970,816 |
| 90 | 561,735,816,701,000,024,064 |
| 100 | 624,150,907,445,999,960,064 |