Step 1 New here? Start with digits 1–12
There are already tools out there for memorising pi. Some of them are good. Some have been around for years and have loyal communities. So why build another one?
The honest answer is that I couldn’t find exactly what I wanted. And instead of complaining, I tried to build it.
Like many people, I first tried brute-force memorisation. I’d stare at a sequence of digits, repeat them in my head, and see how far I could get. I hit a wall around 30 digits. That’s when I started looking for tools.
The existing options fell into two camps: either very basic (just a long string of digits on a page) or over-engineered (requiring accounts, payments, or complex setups). None of them quite clicked with me.
One day I was entering a PIN code and realised something: I didn’t actually remember the numbers. I remembered the shape my fingers made on the keypad. My muscle memory knew the PIN even when my conscious mind didn’t.
That was the spark. What if you could learn pi the same way? Not by staring at digits on a screen, but by tapping them on a numpad until your fingers just knew the pattern?
That’s the core idea behind MemorisePi. It’s a numpad trainer. You tap the digits. You build spatial, muscle memory, the same kind that lets you type your phone PIN without thinking.
I want to be clear: I didn’t invent any memorisation technique. The Method of Loci goes back to ancient Greece. The Major System has been around for centuries. People have memorised over 70,000 digits of pi using these methods, a feat that’s genuinely awe-inspiring.
What MemorisePi tries to do is combine the numpad approach with these proven mnemonic techniques in a clean, free, no-login interface. Nothing groundbreaking. Just a different combination of existing ideas, packaged in a way that I personally find useful.
What started as a pi trainer grew into something broader. The site now covers dozens of mathematical constants — e, phi, the square root of 2, the Euler-Mascheroni constant, and many more. There are flashcards, study modes, and educational articles about each constant.
It’s available in 14 languages (though I’ll be honest, some translations could be better). And it’s completely free. No accounts, no paywalls, no tracking beyond basic analytics.
MemorisePi is a small project made by one person. It’s not perfect. The design could be better. There are features I haven’t built yet. But it exists, it works, and some people seem to find it useful.
If you’re one of those people, that genuinely makes me happy.
And if you can memorise more digits than me (which, frankly, wouldn’t be hard) I’d love to hear about it.
Happy memorising.