ETH to Wei Converter (Exact)

Yes. Wei is a base unit of Ethereum, so converting ETH to wei is a fixed, exact conversion (no market price needed).

Convert Ethereum (ETH) to wei using the exact formula: 1 ETH = 1,000,000,000,000,000,000 wei. No API, no price feed.

Amount (ETH)

Wei

—

Formula

ETH × 1e18

Frequently Asked Questions

How many wei are in 1 ETH?

There are exactly 1,000,000,000,000,000,000 wei (1e18) in 1 ETH.

Is ETH to wei conversion exact?

Yes. ETH to wei conversion is a fixed unit conversion, not a market-price conversion.

What is wei?

Wei is the smallest unit of Ethereum. 1 wei equals 0.000000000000000001 ETH (1e-18 ETH).