Check It Yourself · no trust required

Don’t trust us. Do the math.

Bitcoiners say “don’t trust, verify.” So here are the calculators. They run the same numbers the explainers use, and not one of them needs a price prediction. Go nuts.

fact

Zero price predictions.

Every input here is either written in the code or sitting on the public ledger. You can check all of it.

21,000,000 BTC max supply

Halving every 210,000 blocks

About 10 minutes per block

The calculators.

Change the inputs, watch the math. Everything runs live off the current block height, so the answers change as the chain grows. (Slowly. About every ten minutes.)

The Toybox.

Every block on the Path comes with a toy. Poke them. Break them. (You can’t break them. We checked.) Each one also lives at the top of its explainer.

Verify it without us.

That’s the whole point. We’ll miss you, but that’s the whole point.

The source document

Read the white paper

Nine pages from 2008. Satoshi’s original design, in Satoshi’s own words.

The public ledger

Watch blocks arrive

See every new block land, roughly every ten minutes, on a public block explorer.

The final boss

Run your own node

Download the whole chain and check every rule yourself. No trust in anyone required.