About this tool

Ether to Wei Converter

Convert ether to wei instantly. Free, bidirectional, and fully in-browser.

1 ether equals 1e+18 wei — enter any ether value to convert it to wei instantly. This Ether to Wei converter is a client-side tool: it applies a single multiplication (wei = ETH × 1e+18) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert wei back to ether. A reference table lists common ether values already converted, and nothing you enter is sent to a server.

How to use Ether to Wei Converter

1. 1

   Open Ether to Wei Converter on AltFTool — it loads instantly in your browser.

2. 2

   Type the value you want to convert into the Ether field.

3. 3

   Read the equivalent in wei in the result field, and copy it if needed.

4. 4

   Use the decimal-places slider for more or less precision, or press swap to convert wei to ether.

Why use Ether to Wei Converter

• Instant, both ways

  The result updates as you type, and the swap button flips the conversion to wei → ether without reloading.

• Exact Ethereum Unit math

  The conversion uses the precise factor (wei = ETH × 1e+18), so the number matches a manual calculation to the decimal places you choose.

• Adjustable precision

  A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.

• Private and free

  Everything runs locally in your browser — no upload, no account, no limit on conversions.

Common use cases

• Converting a ether measurement to wei for a spec, listing, or report.
• Checking ether↔wei figures while comparing products, datasets, or documentation.
• Learning the ether-to-wei relationship from the worked formula and the common-value table.

Frequently asked questions