Asteroid Impact Energy Calculator
Estimate the explosive energy of an asteroid impact based on its size and speed. Results are approximate and for educational purposes.
Estimated impact energy
Explosive energy
—
Megatons of TNT
Equivalent to
—
Hiroshima-size bombs
Famous comparisons
- Chelyabinsk (2013): ~0.4–0.5 megatons
- Tunguska (1908): ~10–15 megatons
- Dinosaur extinction: ~100,000,000 megatons
This assumes the asteroid’s kinetic energy is released explosively in the atmosphere or on impact.
How we calculate
Energy = ½ × mass × velocity². Mass is estimated from asteroid volume and density. 1 megaton TNT ≈ 4.184 × 10¹⁵ joules.