Energy is weight × velocity² / 450240 — at the muzzle that's one line of arithmetic. What matters downrange needs the solver, so this page runs the full trajectory and reports retained energy at every step.
Read this before you rely on any number here. Predictions use the standard G1/G7 drag models and the data you enter — they are estimates, not measurements, and they are never load advice. Confirm with live fire at distance. For anything you load yourself, work only from current published manuals (Hodgdon, Sierra, Hornady, Lyman), start low, and work up. TruingLog publishes no load recipes and suggests no charge weights.