Run the numbers before you ape in. Size a position by risk, work out your liquidation price and leverage, estimate impermanent loss, convert gwei, wei and satoshis, and track your average entry and PnL. Nothing connects to your wallet and nothing is uploaded, you just type the numbers and get the math. All 27 tools below are free, run in your browser, and need no sign-up.
Free Gwei to ETH and ETH to Gwei converter. Convert Ethereum gas price units instantly in your browser with full precision and no rounding errors.
Free Wei to ETH and ETH to Wei converter. Convert the smallest Ethereum unit to ether and back with exact 18 decimal precision in your browser.
Free Ethereum unit converter for wei, gwei and ether. Convert between all Ethereum denominations at once with exact 18 decimal precision in your browser.
Free Satoshi to BTC and BTC to Satoshi converter. Convert Bitcoin satoshis to whole BTC and back with exact 8 decimal precision in your browser.
Free sats per dollar calculator. Enter the Bitcoin price to see how many satoshis one US dollar buys and what any dollar amount is worth in sats.
Free crypto profit calculator. Enter entry price, exit price, amount and fees to see net profit or loss, return percentage and total value instantly.
Free crypto dollar cost averaging calculator. Enter your buy prices and amounts to find your average cost basis, total coins and blended entry.
Free crypto average buy price calculator. Enter each purchase price and coin quantity to find your weighted average cost basis and total holdings.
Free impermanent loss calculator for liquidity pools. Enter the price ratio change to see impermanent loss percent versus simply holding the tokens.
Free crypto liquidation price calculator for long and short leverage positions. Enter entry price, leverage and side to find your liquidation price.
Free crypto position size calculator. Enter account size, risk percent, entry and stop loss to find the position size that caps your loss per trade.
Free crypto leverage calculator. Enter margin and position size to find your leverage, or enter leverage and margin to find the position you can open.
Free perpetual funding rate calculator. Enter position size, funding rate and time to see the funding cost or income you pay or earn over a period.
Free crypto staking rewards calculator. Enter staked amount, APR and duration to project your staking income with and without compounding.
Free crypto APY to APR converter. Convert between annual percentage rate and yield for any compounding frequency used in DeFi staking and lending.
Free token market cap and FDV calculator. Enter price, circulating supply and total supply to compute market capitalization and fully diluted valuation.
Free crypto stop loss and take profit calculator. Enter entry price and percentages to get exact stop and target prices for long or short trades.
Free risk reward ratio calculator for crypto trades. Enter entry, stop loss and target prices to get your risk to reward ratio and break even win rate.
Free Ethereum gas fee calculator. Enter gas price in gwei and gas limit to compute transaction cost in ETH and in dollars at any ETH price.
Free EIP-55 Ethereum address checksum tool. Convert a 0x address to its checksummed form and validate the mixed case checksum entirely in your browser.
Free BIP39 seed phrase word count checker. Paste a recovery phrase to verify it has a valid 12, 15, 18, 21 or 24 word length before importing.
Free break even recovery calculator. Enter a drawdown percent to see the exact gain needed to get back to even, a key rule for crypto losses.
Free rule of 72 calculator for crypto. Enter an annual return to estimate how long it takes your holdings to double, or the return needed to double in a time.
Free crypto airdrop value calculator. Enter tokens received and token price to see your airdrop value, plus per wallet value across multiple wallets.
Free crypto ROI multiple calculator. Convert between a return multiple like 10x and a percentage gain, and find your profit from an investment amount.
Free crypto trading fee breakeven calculator. Enter maker and taker fees to find the minimum price move needed to cover round trip trading costs.
Free crypto portfolio allocation calculator. Enter each holding value to see percentage weights and how far each is from a target allocation to rebalance.
Yes. Every tool in this toolkit is completely free, with no sign-up and no usage limits.
Yes. They run in any modern web browser on phone, tablet or desktop, with nothing to install.
Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.