About PiNumpad. Pi

PiNumpad is a free memory trainer for pi (3.14159265358979...), the ratio of a circle's circumference to its diameter. This page is the guided learning mode: tap each digit with the path visible, building the motor memory before removing the visual scaffold in Play mode.

Guided digit-by-digit entry. Learn mode shows the path and the digits simultaneously as you tap. Each correct tap highlights the next step; the path is always visible. This bridges the gap between passive study and active recall, letting you build the motor pattern before removing the visual scaffold.

Pi appears in geometry, trigonometry, physics, statistics, and engineering. Memorising its digits is a classic mental challenge and a popular competitive memory sport. Tap each digit in order. The path remains visible throughout. When you complete a group, the next group loads automatically. Once the path feels natural in Learn mode, move to Play mode to practice without it.

PiNumpad is designed for students, competitive memorisers, maths enthusiasts, and anyone who has ever wanted to rattle off more than 3.14. It runs entirely in the browser with no account, no installation, and no cost. Progress is saved locally using your browser's storage.

Play · Study · Digits · How to memorise · About