Free Bitcoin Units Converter

The Bitcoin Units Converter is a free online tool that convert between btc, mbtc, μbtc, bits, and satoshis in real-time. includes usd equivalent via live price and transaction fee calculator in sat/vbyte.. It runs entirely in your browser with no installation or sign-up needed.

BTC, mBTC (millibitcoin), μBTC/Bits (microbitcoin), and Satoshi (the smallest unit: 0.00000001 BTC).

Live BTC price is fetched from the CoinGecko free API and used to calculate USD equivalents.

Yes, completely free.

Absolutely. The Bitcoin Units 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 Bitcoin Units 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 Bitcoin Units 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 Bitcoin Units 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, because BTC is divisible to eight decimal places and a satoshi is the smallest indivisible unit (0.00000001 BTC). That fixed structure means 0.001 BTC is 100,000 sats, 0.0001 BTC is 10,000 sats, and 0.00000001 BTC is a single satoshi. The satoshi is the value you actually transact in on-chain, while wallets and exchanges usually display whole BTC, which is why a balance like "0.00042 BTC" can be confusing until you see it as 42,000 sats. This converter handles that math with arbitrary-precision integers rather than floating-point, so even converting 21,000,000 BTC down to satoshis stays exact with no rounding drift. Type any BTC amount above and it shows the satoshi total, plus mBTC, μBTC, and bits, instantly.

There is no difference in value — a bit and a microbitcoin (μBTC) are two names for the exact same amount: 0.000001 BTC, which is 100 satoshis. "Microbitcoin" is the formal metric-style name following the same pattern as millibitcoin (mBTC), while "bit" was promoted as a friendlier, everyday label that's easier to say and read in small amounts, such as quoting a price as "500 bits" instead of "500 μBTC." Both sit between the satoshi and the millibitcoin on the denomination scale. Because they're identical, you can use whichever term your wallet, exchange, or community prefers without changing the underlying figure. This converter lists Bit and Microbitcoin as separate rows so you can copy the value under either label, but you'll notice they always show the same number. Enter an amount above to see both alongside BTC and satoshis.

Bitcoin fees are charged per virtual byte (vByte) of a transaction's size, not as a percentage of the amount sent, so the fee equals your chosen rate in sat/vByte multiplied by the transaction's vByte count. A 141 vByte transaction at 10 sat/vByte costs about 1,410 satoshis regardless of whether you're moving $5 or $5,000. Higher sat/vByte rates make your transaction more attractive to miners and confirm faster when the mempool is busy, while lower rates save money but may wait longer. Transaction size depends on address type: a native SegWit (P2WPKH) spend is roughly 141 vBytes, a Taproot (P2TR) spend about 111 vBytes, and an older legacy (P2PKH) spend near 226 vBytes. The built-in fee calculator shows the cost in satoshis, BTC, and USD across six rates (1 to 100 sat/vByte). Enter your transaction size in vBytes above to compare them.

The USD figure is as accurate as the latest spot price pulled from the free CoinGecko API, which reflects an aggregated market rate at the moment the tool loaded or when you last refreshed it. Because Bitcoin's price moves continuously, the dollar value is a near-real-time snapshot rather than a locked quote, so press the refresh button before relying on it for anything time-sensitive. The unit math itself — BTC, mBTC, μBTC, bits, and satoshis — is exact and never depends on the price feed, so if CoinGecko is briefly unavailable the denomination conversions still work; you simply won't see the USD column until the price loads again. Note the displayed rate is a general market price, not the exact bid or ask you'd get on any specific exchange after spreads and fees. Enter an amount and hit refresh to read its current dollar value.

Most wallets and exchanges denominate balances in whole Bitcoin, and since one BTC is worth a large amount, everyday holdings end up as small fractions with many leading zeros, like 0.00042 BTC. That same balance is far easier to read as 42,000 satoshis, or 0.42 mBTC, because those denominations scale the number into a friendlier range. Lightning invoices and microtransactions are usually quoted in sats or bits for exactly this reason, while blockchain explorers and developer tools often report raw satoshi integers. Converting between units removes the ambiguity that causes people to misread a balance or a fee by a factor of ten. Paste your BTC balance above and the tool instantly shows it in satoshis, bits, μBTC, and mBTC at once, plus the live USD value, so you can see the same amount in whichever unit makes the most sense to you.