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E = mc2 Calculator
Energy equivalent of a mass using Einsteins mass-energy relation.
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Energy equivalent of a mass using Einsteins mass-energy relation.
E = mc2 Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: E = m c^2.
How It Works
Key concepts behind this calculator
1
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2
Calculate
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3
Review
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4
Adjust
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Quick Reference Guide
E Quick Guide
Typical values for reference.
| Mass kg | Energy | ||
|---|---|---|---|
| 0.001 | 8.988e+13 J | ||
| 0.000001 | 8.988e+10 J | ||
| 1 | 8.988e+16 J | ||
| 70 | 6.291e+18 J | ||
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
E = mc2 Calculator FAQ
Answers to common questions about this calculator.
Mass and energy are equivalent, linked by the speed of light squared.
About 90 terajoules.
Only in matter-antimatter annihilation.
It is rest energy only.