Sei Unit Converter
Instantly convert Sei amounts between SEI and its smallest unit, the Wei. On Sei, 1 SEI = 10^18 Wei, so a single rounding mistake can be costly — this tool keeps every denomination exact.
* Sei uses the same unit system as Ethereum. 1 SEI = 1018 Wei. Gwei is commonly used for gas price calculations.
Understanding Sei units
The native asset of Sei is SEI, divisible into 18 decimal places. The smallest indivisible unit is the Wei. Smart contracts, RPC responses, and on-chain transactions almost always use Wei, while wallets and exchanges display SEI — converting between them correctly is essential for developers and traders alike.
Sei denomination table
| Unit | Value in Wei |
|---|---|
| SEI | 1,000,000,000,000,000,000 |
| Finney | 1,000,000,000,000,000 |
| Szabo | 1,000,000,000,000 |
| Gwei (Shannon) | 1,000,000,000 |
| Wei | 1 |
Why convert Sei units?
Whether you are debugging a transaction, setting gas values, reading uint256 contract data, or simply checking a balance, working in the right Sei denomination prevents expensive mistakes. This converter handles SEI, Wei, and all intermediate units with full precision.