Ethereum Unit Converter (Wei, Gwei, Ether) and Bitcoin Units
The Crypto Unit Converter turns any value into every denomination of the same coin instantly — Wei, Gwei, and Ether on Ethereum, or Satoshi up to BTC on Bitcoin. Pick a chain, type a number, and read all the equivalents at once, with the unit you entered highlighted.
It is built for developers reading gas prices in Gwei, traders thinking in Satoshis, and anyone who needs to move a value cleanly between a wallet, a smart contract, and a block explorer. This is a unit converter, not a price converter — it does not turn ETH into BTC or into dollars, only between the named sub-units of a single coin.
How to Convert Crypto Units
Choose the blockchain
Use the tabs at the top to switch between Ethereum and Bitcoin. Each chain loads its own units, quick examples, and reference cards.
Select the source unit
Open the unit dropdown next to the input and choose what you are converting from — for example Gwei or Ether on Ethereum, Satoshi or BTC on Bitcoin.
Type a value
Enter a number in the input field. The conversion updates instantly as you type — there is no convert button to press.
Read and copy the results
Every equivalent unit appears below with your source unit highlighted. Click the copy button on any row to copy that value to your clipboard, with thousand separators stripped for a clean paste.
Below the converter, the quick example buttons fill the input with common values — like 21 Gwei or 1 ETH — so you can check a typical gas price or amount in one click. Press Escape at any time to clear the input.
Features
Dual Blockchain Support
Switch between the Ethereum and Bitcoin unit systems with one click — each chain keeps its own units, examples, and reference cards.
All Ethereum Units
Convert across Wei, Kwei (Babbage), Mwei (Lovelace), Gwei (Shannon), Szabo, Finney, and Ether.
All Bitcoin Units
Convert across Satoshi, Microbitcoin (μBTC), Millibitcoin (mBTC), Centibitcoin (cBTC), and Bitcoin.
Real-Time Conversion
Results recalculate the moment you type — no convert button, and non-numeric characters are filtered out automatically.
Full-Precision Math
String-based decimal shifting keeps every digit exact across the full 18-order range from Wei to Ether — no floating-point drift.
Quick Examples
One-click buttons load common values like 21 Gwei, 1 ETH, or 1 BTC straight into the converter.
Copy to Clipboard
Copy any result with one tap; thousand separators are removed so the number is ready to paste into a wallet or code.
Readable Formatting
Large numbers display with thousand separators for easy reading, while the highlighted source row shows what you entered.
Unit Reference Cards
Each unit gets a card explaining its full name, aliases, and how it relates to the base unit — handy for newcomers and developers.
Keyboard Shortcut
Press Escape to clear the input field instantly and start a fresh conversion.
Frequently Asked Questions
How many Wei are in 1 Ether?
One Ether equals 1,000,000,000,000,000,000 Wei — that is 1018, an eighteen-zero number. Wei is the smallest, indivisible unit of Ether, used internally by smart contracts and the EVM. Select Ether as the source unit, type 1, and the Wei row shows the full figure.
What is Gwei used for?
Gwei (also called Shannon) equals 1 billion Wei (109 Wei) and is the standard unit for expressing gas prices on Ethereum. A gas price of "21 Gwei" means each unit of gas costs 21 billion Wei. It is the most practical scale for fees, which is why Gwei is the converter's default unit.
How do I convert Wei to Gwei?
Choose Ethereum, set the source unit to Wei, and type your value — the Gwei row updates instantly. Since 1 Gwei is 1 billion Wei, you divide Wei by 109. The tool does the shift for you and shows Kwei, Mwei, Gwei, Szabo, Finney, and Ether at the same time.
How many Satoshis are in 1 BTC?
One Bitcoin equals exactly 100,000,000 Satoshis (one hundred million). The Satoshi, named after Bitcoin's pseudonymous creator, is the smallest unit on the chain. As BTC's value has risen, Satoshis have become the practical way to express small amounts.
What are Szabo and Finney?
They are named Ethereum denominations between Gwei and Ether. Szabo (also called Microether, μETH) equals 1 trillion Wei, and Finney (also called Milliether, mETH) equals 1 quadrillion Wei. Both are included in the converter, each with a reference card explaining how it relates to Wei.
Is the converter accurate for very large numbers?
Yes. Instead of JavaScript's floating-point numbers, it uses string-based decimal shifting, so it handles the full range — from a single Wei to billions of Ether — with no precision loss. That accuracy matters because the gap between Wei and Ether spans eighteen orders of magnitude.
Does it convert between different cryptocurrencies or to dollars?
No. It converts only between denomination units within the same coin — Wei to Ether, or Satoshi to BTC. It does not convert ETH to BTC or to fiat currencies, because those would require live market prices, which this tool intentionally does not fetch.
Is my input private?
Yes. Every calculation runs locally in your browser with JavaScript — no values are sent to a server, and nothing you enter is tracked or stored.
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