Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Asteroid Impact Energy Calculator

Calculate the kinetic energy released when an asteroid strikes Earth, expressed in megatons of TNT. Use it to compare historical impacts or assess the potential effect of a hypothetical impactor.

Asteroid Diameter (m)

Impact Velocity (km/s)

Asteroid Density

Impact Angle (°)

Fill in the required fields to see your result.

Astronomy

Meteor Shower Activity Calculator

Estimate how many meteors per hour you will actually see during a meteor shower, accounting for radiant altitude, sky darkness, and moonlight. Use it on the night of a shower to set realistic expectations.

Zenith Hourly Rate (meteors/hour)

Radiant Altitude (degrees)

Limiting Magnitude (mag)

Moon Illumination (%)

Fill in the required fields to see your result.

Key differences

	Asteroid Impact Energy Calculator	Meteor Shower Activity Calculator
Category	Astronomy	Astronomy
Inputs required	4	4
Result	Impact Energy (megatons TNT)	Expected Hourly Rate (meteors/hour)
What it does	Calculate the kinetic energy released when an asteroid strikes Earth, expressed in megatons of TNT. Use it to compare historical impacts or assess the potential effect of a hypothetical impactor.	Estimate how many meteors per hour you will actually see during a meteor shower, accounting for radiant altitude, sky darkness, and moonlight. Use it on the night of a shower to set realistic expectations.