# Sei EVM Block time Methodology

## 1. Overview

Block time for Sei EVM measures the average duration required for a new block to be produced and added to the blockchain. This metric serves as a primary indicator of network latency and the speed at which the protocol updates its state and processes transactions. It is a critical performance benchmark for the Sei EVM execution environment on the Sei Network.

## 2. Data sources

- **Blockchain events**: Block metadata, including timestamps and block numbers, from Sei EVM on Sei Network
- **External data**: None required for this metric

## 3. Step-by-step calculation

### Component A: Block metadata extraction

- **Purpose**: Retrieve the fundamental timing and sequencing data for the blockchain.
- **Logic**: Block timestamps and block numbers are extracted from the Sei EVM block records. To ensure data integrity, the genesis block (block 0) is excluded from the dataset as it lacks a preceding block for interval measurement.
- **Key fields**: `block_timestamp` and `block_number`

### Component B: Block interval measurement

- **Purpose**: Calculate the elapsed time between consecutive blocks.
- **Logic**: Blocks are ordered chronologically by block number. The time difference between each block's timestamp and its immediate predecessor's timestamp is calculated in milliseconds. The calculation is restricted to strictly consecutive blocks where the block number increment is exactly one, preventing inaccuracies that could arise from missing or skipped block data.
- **Key fields**: `block_time` (calculated as the difference between current and previous timestamps)

### Component C: Daily mean calculation and aggregation

- **Purpose**: Aggregate high-frequency interval data into a standardized daily average.
- **Logic**: Individual block intervals are grouped by UTC day. The mean block time is calculated for Sei EVM by taking the average of all valid block intervals recorded within each 24-hour period. A zero-filling strategy is applied to the final time series to ensure continuity across the daily granularity.
- **Key fields**: `timestamp` (truncated to day) and `block_time` (daily average)

*This methodology was automatically generated by Token Terminal's methodology analyzer.*

avg(block_timestamp - previous_block_timestamp)

Block time

Blockchains (L1)

Validators process transactions and receive fees from users (supply-side fees).

Sei is a Layer 1 blockchain built for fast, low-cost financial transactions. It combines the security and reliability of Ethereum with the high performance of Solana. To date, Sei has processed billions of transactions across more than 90 million wallets. The project is backed by leading investors, including Multicoin Capital, Jump, Coinbase Ventures, and Circle Ventures. Token Terminal exclusively tracks Sei EVM data.

SEI holders own and govern the protocol. They currently do not take a cut of the transaction fees paid by users (revenue). Sei's investors include Multicoin Capital, Coinbase, etc.

Sei EVM

Block time

Block time

Chain breakdown