Why this matters
Cryptocurrency networks use base units that are far too large for everyday transactions. One Bitcoin is worth tens of thousands of dollars, yet on-chain fees and micro-payments need sub-unit precision. Understanding the denomination ladder — from BTC down to satoshis, from ETH down to wei — is essential for anyone reading gas prices, interpreting NFT listings, or configuring smart contract parameters.
These unit hierarchies are not always intuitive. Ethereum's smallest unit, wei, is 10 to the 18th power of an ETH, a number so small it is easy to misplace a decimal. Solana's lamports, Bitcoin's bits, and Monero's piconero each follow their own naming conventions rooted in cryptography history. A quick-access reference card that works offline eliminates the need to memorize conversion factors or hunt through documentation mid-transaction.
Unit hierarchy by chain
| Chain | Base Unit | Sub-units | Smallest Unit | Decimal Precision |
|---|---|---|---|---|
| Bitcoin | BTC | mBTC, bits, sats | Satoshi (sats) | 10^-8 |
| Ethereum | ETH | Finney, Gwei, mwei, wei | Wei | 10^-18 |
| Solana | SOL | Lamports | Lamport | 10^-9 |
| Cardano | ADA | Lovelace | Lovelace | 10^-6 |
| Monero | XMR | mXMR, piconero | Piconero | 10^-12 |
How to use it
Select a cryptocurrency from the tab bar (BTC, ETH, SOL, XMR, and others).
Browse the full unit hierarchy showing each denomination's name, symbol, decimal places, and value relative to the base unit.
Tap or click any row to copy that conversion factor to your clipboard for use in code, spreadsheets, or transaction forms.
Switch between chains to compare how different networks structure their sub-units and precision levels.
Testing your result
Verify a conversion by cross-referencing with a known value. For Bitcoin, confirm that 100,000,000 satoshis equals 1 BTC. For Ethereum, check that 1,000,000,000,000,000,000 wei equals 1 ETH, or that 1 Gwei equals 0.000000001 ETH. If the reference card is installed as a PWA, test it in airplane mode to confirm all data loads without a network connection, since the denominations are baked into the page.
Common mistakes
Confusing Gwei with Gigawei — Gwei is gigawei (10^9 wei), which is the standard unit for Ethereum gas pricing.
Assuming all chains use the same precision; Bitcoin has 8 decimal places while Ethereum has 18.
Mixing up bits (100 satoshis) with sats (1 satoshi) when reading Bitcoin transaction amounts.
Forgetting that this tool is a reference card, not a converter — use the dedicated converter tools for interactive calculations.
Edge cases and options
The reference covers Bitcoin, Ethereum, Solana, Cardano, Monero, Litecoin, Dogecoin, and Bitcoin Cash. Each chain's tab displays the complete denomination ladder from the base unit down to the smallest sub-unit, including intermediate steps that are commonly used in practice. Because all data is static and embedded in the page, the tool functions as a PWA and remains fully accessible offline — useful when you need to check a gas price in wei while working in an area with poor connectivity.
Real-world use cases
Reading Ethereum gas prices quoted in Gwei and converting them to ETH or USD for cost estimation.
Configuring Bitcoin lightning network channels where payments are denominated in millisatoshis.
Writing smart contract code that needs correct wei values for token transfers or fee calculations.
Comparing fee structures across chains by understanding each network's smallest meaningful unit.
Frequently asked questions
Q: Why do cryptocurrencies have so many units?
A: Because base units (1 BTC, 1 ETH) are too large for everyday use. Smaller denominations let you quote gas fees, NFT prices, and micro-transactions without unwieldy decimals.
Q: Where do the unit names come from?
A: Most are named after cryptography pioneers: Satoshi Nakamoto (BTC), Wei Dai (Wei), Hal Finney (Finney). Solana uses 'lamports' after Leslie Lamport.
Q: Can I convert between units here?
A: This tool is a reference card showing conversion factors. For interactive conversion use the Satoshi to BTC or ETH Unit Converter tools.
Q: Which cryptocurrencies are covered?
A: Bitcoin, Ethereum, Solana, Cardano, Monero, Litecoin, Dogecoin, and Bitcoin Cash.
Q: Why is the smallest unit so small (10^-18 for ETH)?
A: Ethereum's 10^-18 wei matches the precision needed for fine-grained gas pricing — a single transaction's gas might cost 0.000000000000000001 ETH (1 wei). Smaller units give more pricing flexibility.
Start using it now
Try the Crypto Denomination Reference tool. See also Satoshi to BTC Converter, ETH Unit Converter, and Crypto Payment QR Generator.
