Muzzle energy is calculated by the formula E=MV2/450400, where M is bullet mass in grains, V is the bullet velocity in ft/sec, and 450400 is a constant specific to English units of measurement.
The top three rows in the above table are active. So change any number and everything dependent on that number is recalculated. Click one of the buttons below to automatically fill in the values. This page is entirely self-contained with all computations done by JavaScript code embedded in the HTML file. Thus, you can save this HTML file to your hard disk to run the computations offline and easily modify the for your favorite loads.
Rifle:
Shotgun:
Copyright © 2003 Bill St. Clair
Copying and reposting allowed as long as this copyright remains intact