Compare calculators

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

Earthquake Distance Calculator

Estimate the distance from a seismograph station to an earthquake epicenter using the arrival time difference between P and S seismic waves. Useful for seismology education and rapid preliminary epicenter location.

P Wave Arrival Time (seconds)

S Wave Arrival Time (seconds)

Fill in the required fields to see your result.

Geography

Geographic Midpoint Calculator

Find the true geographic center between two GPS coordinates, with optional weighting for each location. Useful for choosing a meeting point, logistics hub, or central headquarters between multiple sites.

First Location Latitude (°)

First Location Longitude (°)

Second Location Latitude (°)

Second Location Longitude (°)

First Location Weight (factor)

Second Location Weight (factor)

Fill in the required fields to see your result.

Key differences

	Earthquake Distance Calculator	Geographic Midpoint Calculator
Category	Geography	Geography
Inputs required	2	6
Result	Epicenter Distance (km)	Midpoint Latitude (°)
What it does	Estimate the distance from a seismograph station to an earthquake epicenter using the arrival time difference between P and S seismic waves. Useful for seismology education and rapid preliminary epicenter location.	Find the true geographic center between two GPS coordinates, with optional weighting for each location. Useful for choosing a meeting point, logistics hub, or central headquarters between multiple sites.