What is Block Time?
Block time is the average time between new blocks on a chain — about 10 minutes on Bitcoin, 12 seconds on Ethereum, sub-second on some high-throughput chains. Shorter block times improve UX but typically come with trade-offs in decentralisation or finality.
Why Block Time matters
Understanding Block Time is part of building a solid mental model of how Bitcoin, blockchain and Web3 systems actually work. Concepts in the Blockchain category sit at the foundation of the broader stack — get them right and the rest is far easier.
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Reading the definition is a start. ZeroToBlock teaches concepts like Block Time through hands-on, browser-based simulations. Build the mental model by actually using it:
- Bitcoin 101 — interactive fundamentals course
- Bitcoin Proof of Work — mining, hashing and consensus
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Related terms
- Block — A bundle of transactions added to the blockchain.
- Difficulty — A parameter that controls how hard it is to mine a block.
- Finality — The point at which a transaction is irreversible.
More blockchain terms
- Blockchain — A chained, append-only ledger of blocks.
- Consensus Mechanism — The rules a network uses to agree on the canonical chain.
- Fork — A divergence in the blockchain or its rules.
- Node — A computer participating in the blockchain network.
- Proof of Stake — A consensus mechanism where validators stake capital instead of burning energy.
- Reorganization (Reorg) — Replacing recent blocks with a competing chain that has more work.
- Transaction — A signed instruction that updates the blockchain state.
- Genesis Block — The first block in a blockchain.
Keep exploring
Continue with the full blockchain glossary — 136 terms in total — or read the developer blog and FAQ for deeper context.