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/ Block Number ⇔ Timestamp

Select Chain

Conversion Mode

Reference Point (Optional - for better accuracy)

Provide a known block number and timestamp for more accurate calculations. Without this, estimates may be rough.

Reference Block

Reference Timestamp

Block Number

How it works: Block times vary by chain. This tool calculates timestamps based on average block times. For best accuracy, provide a reference point (a known block number and its timestamp).

Block Times: Ethereum ~12s, Polygon ~2s, BSC ~3s, Arbitrum ~0.25s, Optimism ~2s

/ Selected Tool

Block Number ⇔ Timestamp

Convert between block numbers and timestamps for different chains

■ 01

What is Block Time?

Block time is the average time it takes for a new block to be added to the blockchain. Different chains have different block times: Ethereum (~12s), Polygon (~2s), BSC (~3s), Arbitrum (~0.25s), Optimism (~2s).

■ 02

How does it work?

Block to timestamp conversion uses the average block time and a reference point (known block and timestamp). The tool calculates the time difference by multiplying the block difference by the chain's average block time.…

■ 03

Sample Cases

Covers Ethereum Block 18000000 to Timestamp, Polygon Block 50000000 to Timestamp, and Arbitrum Block 144000000 to Timestamp so you can compare common inputs and outputs quickly.

/ Code

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/ Integration

Source code from the selected tool, shown here alongside the live version on the right.

/ Source Code

TypeScript

typescript

// No external packages needed - pure Node.js/TypeScript

interface Chain {
  name: string;
  blockTime: number; // seconds per block
}

const chains: Record<string, Chain> = {
  ethereum: { name: 'Ethereum', blockTime: 12 },
  polygon: { name: 'Polygon', blockTime: 2 },