Compare calculators

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

Telescope Magnification Calculator

Compute the effective magnification of your telescope with any eyepiece and Barlow lens combination. Ideal for planning high-power planetary sessions or choosing the right Barlow multiplier.

Telescope Focal Length (mm)

Eyepiece Focal Length (mm)

Fill in the required fields to see your result.

Astronomy

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.

Key differences

	Telescope Magnification Calculator	Asteroid Impact Energy Calculator
Category	Astronomy	Astronomy
Inputs required	2	4
Result	Magnification (x)	Impact Energy (megatons TNT)
What it does	Compute the effective magnification of your telescope with any eyepiece and Barlow lens combination. Ideal for planning high-power planetary sessions or choosing the right Barlow multiplier.	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.