IBO speed, draw weight, draw length and arrow weight — or just punch in your chronograph reading if you have one. A chrono reading is always more accurate.
We estimate your real arrow speed using the ATA formula, accounting for all your accessories like peep sight, kisser button, silencers, and drop-away rest.
Precise sight movement values are calculated for every yardage increment, scaled exactly to your sight radius. The physics is the same formula pros use.
Download the PDF, print at 100% scale (no scaling to fit!), cut along the edge, and stick it to your sight housing. Then verify at the range before season.