Crypto tools
Calculators that show their working. Everything runs in your browser and nothing you type is sent anywhere; the live-price tools only fetch public prices from CoinGecko.
Live-price tools
Crypto portfolio trackerPrivate: your holdings, value and profit or loss, saved only in your browser.XRP calculatorXRP to dollars and dollars to XRP at the live price.Crypto converterAny top-100 coin to dollars or to another coin, at live prices.Coin comparisonsPopular coins side by side, with live data and sourced facts.
Live converters to US dollars
BTC to USDBitcoin to dollars, with sats and what fees do.ETH to USDEther to dollars, with gwei.SOL to USDSolana to dollars, and what a transaction costs.DOGE to USDDogecoin to dollars, and why one DOGE costs cents.USD to BTCHow much bitcoin a dollar amount buys.Sats to USDSatoshis to dollars and bitcoin.Gwei to USD and ETHGwei to ether and dollars, and gas costs.
Investing, tax and trading calculators
Crypto calculatorProfit or loss at today's price, and what if you had invested on a past date.Bitcoin calculatorBTC, dollars and sats at the live price, plus one-time and monthly investment returns.Bitcoin mining calculatorDaily, monthly and yearly BTC, power cost and profit, with live difficulty.Crypto tax calculator (US)2026 federal capital gains tax and the 3.8% NIIT on your crypto gains.Staking calculatorRewards from APR or APY, compounding and fees, for ETH and other coins.Leverage calculatorProfit, return on margin, fees and liquidation for futures trades.Liquidation price calculatorWhere a leveraged long or short gets liquidated, from 2x to 100x.Position size calculatorHow much to trade from your account, risk and stop-loss.
Bitcoin data and price history
Bitcoin halving countdownBlocks and days until the next halving, from the live block height.How many bitcoins are there?A live count of bitcoins mined, left to mine and lost.Bitcoin price historyYearly open, close, high and low since 2010, with a page for each year.Ethereum price historyYearly open, close, high and low since 2015.
Calculators
Crypto profit calculatorProfit or loss after fees, percentage return and break-even price.Unit converterBTC ↔ satoshis, ETH ↔ gwei ↔ wei, exactly, with dollar value.True cost of buyingTrading fee + spread + withdrawal fee: what you really get.Recurring purchase simulatorDollar-cost averaging: average cost and value over time.Network fee calculatorGas and gwei, or sat/vB, turned into dollars.Scam checkerA private red-flag checklist for offers and messages.Blockchain demoEdit a block, break the chain, mine it back.Solo mining oddsYour chance of finding a Bitcoin block, and the wait.
Market math and DeFi
Average buy price calculatorYour weighted average cost per coin across several buys, with fees.Market cap calculatorPrice × circulating supply, with live data, and the price at any market cap.Fully diluted valuation calculatorFDV vs. market cap and the value still to be unlocked.Percentage change calculatorGains and losses, target prices, and the gain needed to recover.Impermanent loss calculatorA liquidity pool position against simply holding.