Find a token's address and decimals on 11+ chains from the Uniswap default token list by symbol, name or contract address, filterable by chain id

Decode a 4-byte EVM function selector or 32-byte event topic into candidate signatures from OpenChain and 4byte with the verified one first and collision warnings

Calories burned for 30 activities from MET values, body weight and minutes, with net calories above resting and similar-intensity activities

Worldwide earthquakes from the EMSC for the last 1-168 hours at or above a minimum magnitude - region, depth, coordinates, agency and the strongest event

Body fat percentage from tape measurements using the US Navy method with ACE category, healthy range and fat and lean mass when weight is supplied

NOAA SPC local storm reports for today or yesterday - tornado, damaging wind and hail reports with location, time, magnitude and state counts

Safe multisig wallet configuration on 8 chains - owners, signature threshold, nonce, enabled modules, guard, version and plain-language risk notes

Black-Scholes-Merton price for European calls and puts with delta, gamma, vega, theta, rho, intrinsic and time value, moneyness and put-call parity check

Website history from the Internet Archive - first and last snapshot, years archived and recent changes

Estimated maximum heart rate by Tanaka, Fox or Gulati formula and five training zones in beats per minute, with Karvonen reserve zones when resting rate is given

Hong Kong Observatory current temperature, humidity, UV index, district rainfall and warnings with the general situation and a 9-day forecast

Electric vehicle range estimate from battery capacity, consumption and reserve - kilometers and miles

Daily NASA satellite image of any place and date (true or false color), 20-2000 km wide

A/B test significance from visitors and conversions - lift, z-score, p-value, confidence interval, winner and the sample size needed per variant

Pregnancy due date by Naegele's rule from last period or conception with cycle adjustment, gestational age today, trimester and key milestone dates

Video frame count and frame interval from frame rate and duration

Average video bitrate calculator from duration and file size - Mbps and kbps

Canadian place geocoder from Natural Resources Canada - coordinates and bounding box for cities, towns, features and addresses across all provinces

Hedera account lookup - HBAR balance, token balances, EVM address, staking node, pending reward, creation time and network supply from the mirror node

Bitcoin halving countdown from a block height: next halving height, blocks and days remaining, estimated date, current subsidy and coins mined so far.