Free tools to dial in your game.

Quick, useful calculators and guides — no sign-up, nothing to install. Built to answer the practical questions every bowler runs into.

Compute your league handicap from your average, the basis, and the percentage.

Find your ideal ball weight from your body weight and a few comfort checks.

Answer a few questions and get matched to the right type of ball.

Enter your rolls and see a fully scored game with strikes and spares.

Want the why behind the numbers?

These tools pair with our guides — start with how scoring works or choosing a ball.