Convert Electronvolts to Calories
Instantly convert Electronvolts (eV) to Calories (cal) with our free online calculator.
Formula: eV to cal — multiply by 3.8293e-20
Reference Table
| Electronvolts (eV) | Calories (cal) |
|---|---|
| 1 | 3.829294e-20 |
| 5 | 1.914647e-19 |
| 10 | 3.829294e-19 |
| 25 | 9.573235e-19 |
| 50 | 1.914647e-18 |
| 100 | 3.829294e-18 |
How to Convert Electronvolts to Calories
Formula
To convert Electronvolts (eV) to Calories (cal): multiply by 3.8293e-20
Step-by-Step
- Start with your value in Electronvolts (eV).
- Multiply by 3.8293e-20 to perform the conversion.
- The result is your value expressed in Calories (cal).
Conversion Factor
1 eV = 3.829294e-20 cal
Reverse Factor
1 cal = 2.611447e+19 eV
Worked Example
Convert 25 Electronvolts to Calories: 25 eV = 9.573235e-19 cal
About Electronvolt (eV)
A unit of energy equal to the energy gained by an electron accelerating through a one-volt electric field (exactly 1.602176634 × 10⁻¹⁹ joules). The electronvolt is the working unit of atomic, molecular, and particle physics: chemical bonds are a few eV; X-rays carry keV (thousands of eV); nuclear reactions release MeV (millions); particle colliders operate at GeV-TeV (billions-trillions). Almost every modern particle-physics paper reports energies in eV.
About Calorie (cal)
The "small" gram-calorie, equal to the energy needed to raise one gram of water by 1°C (exactly 4.184 joules). This is the scientific calorie used in chemistry and physics literature — not the larger Calorie (Cal, capital C) used on US food labels, which is actually a kilocalorie (1 kcal = 1,000 gram-calories). This ambiguity between "cal" and "Cal" is a notorious source of confusion when comparing nutrition data to scientific sources.
Quick Facts
- 1 Electronvolt equals 3.829294e-20 Calories
- 1 Calorie equals 2.611447e+19 Electronvolts
- Electronvolt is a unit of energy
- Calorie is a unit of energy
- This conversion is commonly used in nutrition, electrical billing, physics, and mechanical engineering
Common Electronvolt to Calorie Conversions
| Electronvolts (eV) | Calories (cal) |
|---|---|
| 0.01 | 3.829294e-22 |
| 0.1 | 3.829294e-21 |
| 0.25 | 9.573235e-21 |
| 0.5 | 1.914647e-20 |
| 1 | 3.829294e-20 |
| 2 | 7.658588e-20 |
| 3 | 1.148788e-19 |
| 5 | 1.914647e-19 |
| 10 | 3.829294e-19 |
| 15 | 5.743941e-19 |
| 20 | 7.658588e-19 |
| 25 | 9.573235e-19 |
| 50 | 1.914647e-18 |
| 75 | 2.871971e-18 |
| 100 | 3.829294e-18 |
| 250 | 9.573235e-18 |
| 500 | 1.914647e-17 |
| 1000 | 3.829294e-17 |
| 5000 | 1.914647e-16 |
| 10000 | 3.829294e-16 |
Understanding Electronvolts
The Electronvolt (symbol: eV) is a unit of energy. A unit of energy equal to the energy gained by an electron accelerating through a one-volt electric field (exactly 1.602176634 × 10⁻¹⁹ joules). The electronvolt is the working unit of atomic, molecular, and particle physics: chemical bonds are a few eV; X-rays carry keV (thousands of eV); nuclear reactions release MeV (millions); particle colliders operate at GeV-TeV (billions-trillions). Almost every modern particle-physics paper reports energies in eV.
Electronvolts are commonly used in nutrition, electrical billing, physics, and mechanical engineering.
Understanding Calories
The Calorie (symbol: cal) is a unit of energy. The "small" gram-calorie, equal to the energy needed to raise one gram of water by 1°C (exactly 4.184 joules). This is the scientific calorie used in chemistry and physics literature — not the larger Calorie (Cal, capital C) used on US food labels, which is actually a kilocalorie (1 kcal = 1,000 gram-calories). This ambiguity between "cal" and "Cal" is a notorious source of confusion when comparing nutrition data to scientific sources.
Calories are commonly used in nutrition, electrical billing, physics, and mechanical engineering.
Why Convert Electronvolts to Calories?
Converting energy between Electronvolts and Calories is common in physics, nutrition, and engineering. Electricity bills use kilowatt-hours, food labels list calories or kilojoules, and mechanical engineers work with joules and BTUs. Reliable conversion helps professionals and consumers compare energy values across different contexts.
Frequently Asked Questions
How do I convert Electronvolts to Calories?
A unit of energy equal to the energy gained by an electron accelerating through a one-volt electric field (exactly 1. To convert Electronvolts to Calories, multiply by 3.8293e-20. For example, 25 eV equals 9.573235e-19 cal.
How many Calories are in 1 Electronvolt?
There are 3.829294e-20 Calories in 1 Electronvolt.
How many Electronvolts are in 1 Calorie?
There are 2.611447e+19 Electronvolts in 1 Calorie.
What is the formula for Electronvolt to Calorie conversion?
The formula is: multiply by 3.8293e-20. This means 1 eV = 3.829294e-20 cal.
Is a Electronvolt bigger than a Calorie?
Yes. One Electronvolt is larger than one Calorie because 1 eV equals 3.829294e-20 cal, which is less than 1.
When do you need to convert between Electronvolts and Calories?
The "small" gram-calorie, equal to the energy needed to raise one gram of water by 1°C (exactly 4. Electronvolt and Calorie are both energy units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.