Electronvolts to Joules (eV → J) — Free Online Converter

eV → J Reference Table

eV	J
0.001 eV	1.602177e-22 J
0.002 eV	3.204353e-22 J
0.003 eV	4.806530e-22 J
0.004 eV	6.408707e-22 J
0.005 eV	8.010883e-22 J
0.006 eV	9.613060e-22 J
0.007 eV	1.121524e-21 J
0.008 eV	1.281741e-21 J
0.009 eV	1.441959e-21 J
0.01 eV	1.602177e-21 J
0.02 eV	3.204353e-21 J
0.03 eV	4.806530e-21 J
0.04 eV	6.408707e-21 J
0.05 eV	8.010883e-21 J
0.06 eV	9.613060e-21 J
0.07 eV	1.121524e-20 J
0.08 eV	1.281741e-20 J
0.09 eV	1.441959e-20 J
0.1 eV	1.602177e-20 J
0.2 eV	3.204353e-20 J
0.3 eV	4.806530e-20 J
0.4 eV	6.408707e-20 J
0.5 eV	8.010883e-20 J
0.6 eV	9.613060e-20 J
0.7 eV	1.121524e-19 J
0.8 eV	1.281741e-19 J
0.9 eV	1.441959e-19 J
1 eV	1.602177e-19 J
1.5 eV	2.403265e-19 J
2 eV	3.204353e-19 J
2.5 eV	4.005442e-19 J
3 eV	4.806530e-19 J
3.5 eV	5.607618e-19 J
4 eV	6.408707e-19 J
4.5 eV	7.209795e-19 J
5 eV	8.010883e-19 J
5.5 eV	8.811971e-19 J
6 eV	9.613060e-19 J
6.5 eV	1.041415e-18 J
7 eV	1.121524e-18 J
7.5 eV	1.201632e-18 J
8 eV	1.281741e-18 J
8.5 eV	1.361850e-18 J
9 eV	1.441959e-18 J
9.5 eV	1.522068e-18 J
10 eV	1.602177e-18 J
11 eV	1.762394e-18 J
12 eV	1.922612e-18 J
13 eV	2.082830e-18 J
14 eV	2.243047e-18 J
15 eV	2.403265e-18 J
16 eV	2.563483e-18 J
17 eV	2.723700e-18 J
18 eV	2.883918e-18 J
19 eV	3.044136e-18 J
20 eV	3.204353e-18 J
25 eV	4.005442e-18 J
30 eV	4.806530e-18 J
35 eV	5.607618e-18 J
40 eV	6.408707e-18 J
45 eV	7.209795e-18 J
50 eV	8.010883e-18 J
55 eV	8.811971e-18 J
60 eV	9.613060e-18 J
65 eV	1.041415e-17 J
70 eV	1.121524e-17 J
75 eV	1.201632e-17 J
80 eV	1.281741e-17 J
85 eV	1.361850e-17 J
90 eV	1.441959e-17 J
95 eV	1.522068e-17 J
100 eV	1.602177e-17 J
120 eV	1.922612e-17 J
125 eV	2.002721e-17 J
130 eV	2.082830e-17 J
140 eV	2.243047e-17 J
150 eV	2.403265e-17 J
160 eV	2.563483e-17 J
175 eV	2.803809e-17 J
180 eV	2.883918e-17 J
200 eV	3.204353e-17 J
225 eV	3.604897e-17 J
250 eV	4.005442e-17 J
275 eV	4.405986e-17 J
300 eV	4.806530e-17 J
350 eV	5.607618e-17 J
400 eV	6.408707e-17 J
450 eV	7.209795e-17 J
500 eV	8.010883e-17 J
600 eV	9.613060e-17 J
700 eV	1.121524e-16 J
750 eV	1.201632e-16 J
800 eV	1.281741e-16 J
900 eV	1.441959e-16 J
1000 eV	1.602177e-16 J
1200 eV	1.922612e-16 J
1250 eV	2.002721e-16 J
1500 eV	2.403265e-16 J
1750 eV	2.803809e-16 J
2000 eV	3.204353e-16 J
2500 eV	4.005442e-16 J
3000 eV	4.806530e-16 J
4000 eV	6.408707e-16 J
4500 eV	7.209795e-16 J
5000 eV	8.010883e-16 J
6000 eV	9.613060e-16 J
7000 eV	1.121524e-15 J
7500 eV	1.201632e-15 J
8000 eV	1.281741e-15 J
9000 eV	1.441959e-15 J
10000 eV	1.602177e-15 J
15000 eV	2.403265e-15 J
20000 eV	3.204353e-15 J
25000 eV	4.005442e-15 J
50000 eV	8.010883e-15 J
75000 eV	1.201632e-14 J
100000 eV	1.602177e-14 J

Values based on NIST SP 811 conversion factors

Why Convert Electronvolts to Joules?

Converting between electronvolts (eV) and joules (J) is one of the most common energy conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert eV to J saves time and prevents errors.

Energy conversions from eV to J are crucial for dietitians, physicists, and engineers. In nutrition, understanding the link between calories and joules helps individuals manage their diet and energy intake effectively. In the power sector, converting between kilowatt-hours and British Thermal Units (BTU) is necessary for sizing heating and cooling systems for homes and offices. Physicists rely on precise energy unit conversions to calculate work, heat, and thermodynamic processes. Whether tracking fitness goals or analyzing home energy bills, accurate conversion empowers users to make better health and financial decisions.

How to Convert Electronvolts to Joules

To convert electronvolts to joules, use the following formula:

J = eV × 1.602177e-19

Example: 1 eV = 1.602177e-19 J

For example, 5 eV = 8.010883e-19 J, 10 eV = 1.602177e-18 J, and 100 eV = 1.602177e-17 J. For larger values, 1000 eV = 1.602177e-16 J. Conversely, 1 J = 6.241509e+18 eV. Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Mistakes to Avoid

Calorie confusion: Food 'Calories' are actually kilocalories (kcal).
Joule scale: 1 kWh is 3.6 million Joules (orders of magnitude difference).
Power vs Energy: mixing up Watts (power) and Watt-hours (energy).

Pro Tips

Food labels: Learn to read kcal; average adult needs ~2000 kcal/day.
Battery capacity: Wh = V * Ah. Useful for comparing different voltage batteries.
Efficiency: Energy cannot be created/destroyed, only converted (with some loss as heat).

What is a Electronvolt?

A tiny unit of energy used in atomic physics.

Describes energy levels of particles.

What is a Joule?

The joule (J) is the SI derived unit of energy. Defined as the work done by a force of one newton displacing an object by one meter.

Joules are used in science and engineering to measure work, energy, and heat. In nutrition, kilojoules (kJ) are used in many countries instead of calories.

Frequently Asked Questions

How many joules are in 1 electronvolt?

1 eV equals 1.602177e-19 J. This is an exact conversion factor defined by NIST.

How do I convert electronvolts to joules?

Multiply the value in eV by the conversion factor. For example, 10 eV = 1.602177e-18 J. Use our calculator above for instant results.

Is the electronvolts to joules conversion exact?

Yes, this conversion is mathematically exact based on the international definition of these units (NIST SP 811).

Can I convert electronvolts to joules offline?

Yes! OmniConvert runs entirely in your browser — no internet connection needed after the page loads. Your data never leaves your device, ensuring complete privacy.

What is the difference between electronvolts and joules?

Electronvolts (eV) and Joules (J) are both units of energy but belong to different measurement systems. 1 eV = 1.602177e-19 J. Use the converter above to switch between them instantly.

Electronvolts → Joules