QR Code Size Calculator
How big should a QR code be? Enter scan distance and content length to get the minimum print size.
≥ 50 mm (1.97 in)
QR version 3, 37×37 modules incl. quiet zone → 591px at 300 dpi. Rule: size ≈ distance ÷ 10, and each module ≥ 3 printer dots. Use a short link (dynamic code) to reduce modules and print smaller.