Archery Tools & Calculators
Free, practical tools for every archer — work out draw length and draw weight, match arrow spine, tune point weight and FOC, set sight marks, and score your ends, whether you shoot recurve, compound, or traditional.
Draw Length Calculator
Estimate your archery draw length from your arm span (the classic wingspan ÷ 2.5 rule), with a height fallback, shown in inches and centimetres — a starting point to confirm at a shop
Draw Weight Calculator
Find the real peak weight your recurve or traditional bow pulls at your draw length — bows are rated at 28 inches and change by about 5% of the rated weight per inch (compounds differ)
Arrow Spine Calculator
Get a recommended arrow spine from your draw weight, arrow length, and point weight, with a usable stiffer/weaker range read from a published-style carbon spine chart
Arrow FOC Calculator
Calculate your arrow's Front-of-Center balance from its length and balance point, with guidance for target (~7–15%) and hunting (~10–15%) setups
Arrow Kinetic Energy Calculator
Turn arrow weight and speed into kinetic energy and momentum, with Easton-style small, medium, and large game brackets for bowhunting reference
Archery Scoring Guide
A curated reference to target archery scoring — the 10-ring face and inner-10 X, World Archery versus NFAA, and the common rounds (WA 720, 1440, Vegas 300) with their perfect scores