Cryptocurrency Unit Converter

The Cryptocurrency Unit Converter is a free online tool that convert between crypto subunits: btc/satoshi, eth/wei/gwei, sol/lamport with exact bigint precision. It runs entirely in your browser with no installation or sign-up needed.

No. This converts subunits within one coin (e.g. 1 BTC = 100M satoshi). Not between different coins.

JS floats lose precision with huge integers. BigInt ensures exact conversions for values like 10^18 wei.

Bitcoin (BTC/mBTC/μBTC/sat), Ethereum (ETH to wei with gwei/szabo/finney), Solana (SOL/lamport).

Yes, the Cryptocurrency Unit Converter is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Absolutely. The Cryptocurrency Unit Converter processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Cryptocurrency Unit Converter is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Cryptocurrency Unit Converter in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Cryptocurrency Unit Converter works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

One Bitcoin equals exactly 100,000,000 satoshis, or 10^8 of the smallest unit. The satoshi, named after Bitcoin's creator, is the base denomination the network actually records on-chain, since balances are stored as plain integers with no fractional satoshis. That hierarchy also includes the millibitcoin (1 mBTC = 100,000 sat) and the microbitcoin or "bit" (1 μBTC = 100 sat), so 1 BTC is 1,000 mBTC or 1,000,000 μBTC. Knowing the satoshi count matters when you read raw transaction amounts, set fees, or size small purchases, because most wallets and block explorers report values down to the satoshi. Instead of counting zeros by hand, enter any amount on the Bitcoin tab here and every denomination updates instantly with exact integer precision.

Wei, gwei, and ETH are three denominations of the same Ethereum coin, separated by powers of ten. Wei is the smallest indivisible unit: 1 ETH equals 10^18 wei, an 18-digit integer that the network stores directly. Gwei sits in the middle at 1 gwei = 10^9 wei, which makes it the unit gas fees are almost always quoted in, so a "30 gwei" gas price is really 30,000,000,000 wei. ETH is the human-facing unit you see in wallets and on exchanges. There are also finney (10^15 wei), szabo (10^12 wei), mwei, and kwei for completeness. Converting between them by counting eighteen zeros is error-prone, so pick the Ethereum tab here, type a value in any unit, and read off wei, gwei, and ETH together at once.

One SOL equals 1,000,000,000 lamports, that is 10^9 or one billion of Solana's smallest indivisible unit. The lamport is named after computer scientist Leslie Lamport, and like the satoshi on Bitcoin it is the integer amount the Solana network actually records, since there are no fractional lamports on-chain. This unit shows up constantly in development and fee work: transaction fees, rent, and program balances are all expressed in lamports rather than whole SOL, so a fee of 5,000 lamports is 0.000005 SOL. Because the gap is nine orders of magnitude, manual conversion is easy to get wrong by a zero. Open the Solana tab here, enter an amount in SOL or lamports, and the tool converts both directions exactly using BigInt arithmetic so no precision is lost.

Blockchains avoid decimals entirely because floating-point math is not reproducible across different computers, and consensus requires every node to agree on the exact same balance. So networks store value as plain integers in the smallest unit: satoshis for Bitcoin, wei for Ethereum, lamports for Solana. What you see as "1.5 ETH" is really 1,500,000,000,000,000,000 wei under the hood. The catch is that JavaScript's standard numbers are 64-bit floats that only stay exact up to 2^53, roughly 9 quadrillion, while a single ETH is 10^18 wei, far beyond that limit, so naive code silently rounds off the last digits. This tool sidesteps the problem by computing every conversion with BigInt, JavaScript's arbitrary-precision integer type. Enter any value and it round-trips without drift, even an 18-digit wei figure.

Yes, but only as a manual, offline estimate. The converter includes an optional USD price field where you type the current price per coin yourself, and it multiplies that by the main unit amount to give a rough fiat figure shown alongside the unit breakdown. It does not fetch live market data, call any pricing API, or connect to a wallet, so the number is only as current as the price you enter. That design keeps everything private and works even offline, which is handy for quick back-of-the-envelope checks. Keep in mind the USD field never changes the actual unit conversions; those stay exact regardless of price. To try it, enter your amount, type today's coin price in the USD field, and the estimated value appears with every denomination.