Capital gain from a crypto sale by lot using FIFO, LIFO or HIFO, with cost basis, proceeds and the short-term and long-term split per lot.
Bitcoin halving countdown from a block height: next halving height, blocks and days remaining, estimated date, current subsidy and coins mined so far.
Buy and sell amounts that bring a crypto portfolio to target weights, with optional new cash, drift band and fees, plus turnover and the biggest drift.
Rental property underwriting: NOI, cap rate, monthly cash flow, cash-on-cash return, DSCR, gross rent multiplier and break-even occupancy from price and rent.
Refinance comparison: new payment, months to recoup closing costs, remaining interest on each loan and lifetime savings, with optional costs rolled into the loan.
Solve the true APR and effective annual rate of a loan from amount, level payment, number of payments and upfront fees, with total cost of credit.
Running pace per km and mile and speed from distance and time, plus Riegel race predictions for the mile, 5K, 10K, half marathon and marathon.
Estimated one-rep max from any submaximal set using six formulas, the range between them, and a percentage table of training weights and reps.
Solar panel payback in years, ROI, IRR and lifetime savings from system size and cost, with rate escalation, degradation, incentives and maintenance.
Projectile motion with no drag: range, flight time, peak height, impact speed and angle, the optimal range angle and a trajectory table, with launch height.
Bedtimes that end a 90-minute sleep cycle at a given wake time, or wake times for a given bedtime, with total sleep hours and time to fall asleep.
Investment return after fees, tax and inflation: real after-tax rate, future value in nominal and todays dollars, and purchasing power lost on cash.
Is this token a scam? Send any token address on Base, Ethereum, BNB, Arbitrum, Polygon, Optimism or Solana for a verdict, 0-100 score, honeypot and rug check.
US drug overdose deaths by state - latest 12-month CDC provisional counts for fentanyl, opioids, heroin, cocaine and meth, with year-on-year change
US county health statistics from CDC PLACES - diabetes, obesity, depression, smoking, insurance and 30+ more measures, or rank a state's counties
Leading causes of death for any US state or the nation - deaths, share of all deaths and age-adjusted rates for heart disease, cancer, stroke and more
US life expectancy at birth by year since 1900, by sex and race - years, death rate per 100,000, peak year and change over any period (CDC)
Validate a crypto address offline: format and checksum for EVM EIP-55, Bitcoin, Litecoin, Tron, XRP, Solana, TON, Sui, Cosmos and Cardano, with network detection.
Convert crypto units exactly: wei, gwei, ether, lamports, SOL, satoshis, BTC and any token decimals, using integer math with no floating-point rounding errors.
Parse and validate a phone number for 240 regions: validity, E.164 form, country, calling code, line type (mobile, fixed, VoIP) and national and international formats.
Get the verified ABI of an EVM smart contract from Sourcify across 20 chains: functions, events, selectors, proxy implementation ABI and owner-style privileged functions.
Gas conditions for 7 EVM chains: base fee, trend, congestion, priority tips, suggested max fee and USD cost of a transfer, approval, swap and mint.
Decode EVM calldata into plain English: ERC-20, NFT, Uniswap, Aave and permit calls, with risk flags for unlimited approvals, setApprovalForAll and proxy upgrades.
Restate an amount in another year money for about 200 countries using World Bank CPI since 1960: adjusted value, multiplier, and cumulative and annual inflation.
