Kinetic Energy Arrow Calculator

How do you Determine kinetic energy of an arrow?

You'll need 2 metrics to calculate kinetic energy:

1. Velocity or arrow speed (fps):

Use a chronograph or our arrow speed calculator to find yours.

2. Mass arrow weight in grain:

Use a kitchen scale to determine it. Note that the arrow weight INCLUDES shaft, nock, fleching, insert and point.

KE = (m*v2)/450,800

Example:

If you're shooting arrow at 280 fps and your mass arrow weight is 400 grains, then the KE = 400*280*280 /450800 = 69.65 (ft. lbs).

Check out kinetic energy recommendation for hunting game:

Kinetic Energy	Recommendation
15-25 ft-lbs	Small Game (rabbbit, groundhog, etc.)
25-41 ft-lbs	Medium Game (deer, antelope, etc.)
42-65 ft-lbs	Large Game (elk, black bear, wild boar, etc.)
65-80 ft-lbs	Toughest Game (cape buffalo, grizzly, moose, etc.)