NFTs
NFT Royalties Explained: How Creator Fees Actually Work
Creator royalties on NFT resales are set on-chain via EIP-2981, but paying them is voluntary, and many marketplaces make them optional or sk...
Crypto portfolio health
Shape a healthier crypto portfolio
Free calculators and plain-English guides that show your real costs, your concentration risk and your security gaps. No sign-up, no hype, and nothing you type leaves your browser.
Free crypto calculators
All tools →- Crypto Portfolio Health CheckScore your portfolio's concentration, stablecoin buffer, custody and leverage in about a minute.
- Crypto Profit & Loss CalculatorSee your real profit after fees, plus the exact break-even sell price.
- Crypto DCA CalculatorModel a recurring-buy plan: coins accumulated, average cost and the result against a lump sum.
- Crypto ROI & CAGR CalculatorTurn any gain or loss into ROI and an annualized CAGR.
- Crypto Average Cost CalculatorCombine every buy into one average cost, fees included, and test your next purchase.
- Crypto Position Size CalculatorSize a position so a stop-loss costs only the amount you choose to risk.
- Gas Fee Calculator & Gwei ConverterEstimate an Ethereum fee from gas units, base fee and tip, and convert gwei to ETH.
- Crypto Fee Comparison CalculatorCompare up to three platforms by total cost: trading fee, spread and withdrawal fee.
- Token Vesting CalculatorMap a token's unlock schedule from TGE through the cliff to the final release.
- APR to APY CalculatorConvert APR to APY and back, after compounding and commission.
- Impermanent Loss CalculatorSee how a price move changes a 50/50 pool position compared with holding.
- Crypto Wallet Security ChecklistCheck 24 wallet-security habits and see which ones to fix first.
- Crypto Scam Risk CheckerAnswer 12 quick questions to see whether an offer shows scam red flags.
Guides by topic
New here? Start here →- Portfolio HealthStart with: What Is a Healthy Crypto Portfolio? 7 Vital Signs to Check
- Crypto MathStart with: How to Calculate Crypto Profit and Loss (Including Fees)
- DCAStart with: Dollar-Cost Averaging in Crypto: A Complete Beginner's Guide
- Fees & GasStart with: Ethereum Gas Fees Explained: Base Fee, Priority Fee and Gas Limit
- Wallet SecurityStart with: Crypto Wallet Security: The Complete Checklist
- Scam AwarenessStart with: How to Spot a Crypto Scam: 12 Red Flags
- TokenomicsStart with: Token Vesting Explained: Cliffs, Linear Unlocks and TGE
- Risk ManagementStart with: Crypto Position Sizing: The 1% Risk Rule Explained
Latest guides
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DeFi & Yield Farming
Smart Contract Risk: What to Check Before Depositing Funds
Smart contract risk comes from unaudited code, admin keys and weak oracles, not just price moves; this checklist covers what to verify befor...
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DeFi & Yield Farming
DeFi Lending and Borrowing: How Interest Rates Are Set
DeFi lending rates adjust automatically with pool utilization, not a bank decision, and overcollateralization protects lenders if collateral...
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DeFi & Yield Farming
Real Yield vs Inflationary Yield in DeFi
Real yield in DeFi is paid from trading fees or interest; inflationary yield is paid from newly minted tokens, and a posted APR can hide whi...
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DeFi & Yield Farming
Liquidity Pool Math: How Pool Share and Fees Are Calculated
Liquidity pool math explained: how automated market makers calculate your pool share from LP tokens, and how trading fees accrue to that sha...
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Crypto Taxes
Crypto Airdrops and Taxes: When Income Is Recognized
An airdrop is ordinary income once you have dominion and control over the tokens, not necessarily the day they first appear in your wallet, ...
