100 cal to eV — 100 calories in electronvolts
Exact 100 × 26,114,473,967,543,832,576 = 2,611,447,396,754,383,699,968
100 calories in other units
| Joules | 418.4 | J |
|---|---|---|
| Kilojoules | 0.4184 | kJ |
| Megajoules | 0.0004184 | MJ |
| Watt-hours | 0.11622222 | Wh |
| Kilowatt-hours | 0.000116222222 | kWh |
| Kilocalories | 0.1 | kcal |
| British thermal units | 0.39656668 | BTU |
| Therms | 0.000003965667 | thm |
| Foot-pounds | 308.596003 | ft·lbf |
| Electronvolts | 2,611,447,396,754,383,699,968 | eV |
cal to eV at a glance
| Calories | Electronvolts |
|---|---|
| 1 cal | 26,114,473,967,543,832,576 eV |
| 2 cal | 52,228,947,935,087,665,152 eV |
| 3 cal | 78,343,421,902,631,501,824 eV |
| 5 cal | 130,572,369,837,719,175,168 eV |
| 10 cal | 261,144,739,675,438,350,336 eV |
| 20 cal | 522,289,479,350,876,700,672 eV |
| 25 cal | 652,861,849,188,595,924,992 eV |
| 50 cal | 1,305,723,698,377,191,849,984 eV |
| 100 cal | 2,611,447,396,754,383,699,968 eV |
| 250 cal | 6,528,618,491,885,958,201,344 eV |
| 500 cal | 13,057,236,983,771,916,402,688 eV |
| 1,000 cal | 26,114,473,967,543,832,805,376 eV |
How to convert calories to electronvolts
Multiply by 26,114,473,967,543,832,576 — one calorie is 26,114,473,967,543,832,576 electronvolts. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 100 × 26,114,473,967,543,832,576 = 2,611,447,396,754,383,699,968
What these units are
The calorie and the electronvolt are covered in the energy unit guide, along with every other unit on this page.
Questions
How many electronvolts are in a calorie?
One calorie is 26,114,473,967,543,832,576 electronvolts. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 100 calories in electronvolts?
100 calories is 2,611,447,396,754,383,699,968 electronvolts. The working is 100 × 26,114,473,967,543,832,576 = 2,611,447,396,754,383,699,968.
Is a food Calorie the same as a calorie?
No — it is a thousand of them. The Calorie on a nutrition label is a kilocalorie, written with a capital C in principle and almost never in practice. A 250 Calorie chocolate bar holds 250,000 physics calories, or about 1,046 kilojoules, which is why European labels quote kJ alongside.
What does a kilowatt-hour actually represent?
One kilowatt drawn for one hour — a 1,000 W heater running for sixty minutes, or a 100 W bulb for ten hours. It is the unit your electricity bill is priced in, and it equals exactly 3.6 million joules.
How much energy is one BTU?
Roughly the heat needed to raise one pound of water by one degree Fahrenheit — about 1,055 joules, or the energy in a single kitchen match. Air conditioners are rated in BTU per hour, where a 12,000 BTU/h unit is one "ton" of cooling and draws around 3.5 kW of heat.
Why is the electronvolt so small?
Because it is sized for single particles: it is the energy one electron picks up crossing a one-volt potential difference. At about 1.6 × 10⁻¹⁹ joules it would be absurd for anything larger, which is precisely why particle physics uses it instead of dragging around twenty leading zeros.