7,300 resources accept payment on this network. eip155:137
Retirement projection from age, savings and monthly saving - nest egg, value in today's dollars, total contributed, growth and sustainable withdrawal income
Break-even units and revenue from fixed costs, price and variable cost, plus contribution margin, target profit units and margin of safety
Credit card payoff time from balance, APR and a fixed payment - months, total interest, total paid and what share of payments goes to interest
Convert text or identifiers between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, path/case, Title Case and sentence case
Classic ciphers - Caesar with any shift, ROT13, Atbash and Vigenere with a key, encode or decode, with all 25 Caesar candidates for brute force
Inspect a string by code point - UTF-8 bytes, category, script, normalization changes, and warnings for zero-width, bidi and mixed-script lookalike text
Decode a UUID - version, variant, and the embedded timestamp and node for v1, v6 and v7, plus nil and max detection and URN, braced and bare formats
Explain a 5-field cron expression or @daily style macro in plain English and list its next run times in UTC, with runs per day and day-matching rule
Find overlapping working hours across 2 to 8 time zones for a date - UTC windows with local start and end in each zone and total overlap minutes
Split an IPv4 CIDR block into subnets by new prefix or subnet count - network, broadcast, first and last host and usable hosts for each subnet
Convert an ISO 8601 duration like P1DT2H30M or PT90M to seconds, minutes, hours, days and plain words, or turn seconds into a duration string
Convert decimal latitude and longitude to degrees-minutes-seconds and degrees-decimal-minutes, or parse a DMS coordinate pair back to decimal degrees
Polygon area in km2, hectares, acres and square miles from lat,lon vertices, plus perimeter, centroid, bounding box and a point-in-polygon test
Total distance of a multi-stop route from waypoints in km, miles and nautical miles, with each great-circle leg, bearing, detour ratio and travel time
Bounding box around a coordinate for a radius in km, with an lon,lat bbox string, Web Mercator tile numbers at a zoom level and meters per pixel
CODATA 2022 physical constants with value, uncertainty and units - speed of light, Planck, Boltzmann, G, electron and proton mass, Avogadro and more
Matrix calculator for up to 8x8 - determinant, inverse, rank, trace, transpose and the solution of the linear system Ax = b with a square matrix
Find the real and complex roots of a polynomial up to degree 6, with discriminant and vertex for quadratics and a readable form of the equation
BMI, healthy weight range, BMR, daily calories (TDEE) by activity level, calories to lose or gain, body surface area and ideal weight
FDA drug recalls by drug or firm - recall number, class I to III, status, product, reason, recalling firm, distribution, quantity and dates
FDA medical device recalls by device or firm - recall status, product, reason, root cause, firm, corrective action, product code and posting dates
FDA drug label excerpts by brand or generic name - boxed warning, indications, dosage, contraindications, warnings, adverse reactions and interactions
FDA medical device classification by name - device class I to III, product code, regulation number, specialty, implant and life-sustaining flags
Search the current Code of Federal Regulations - CFR citation, part and section, heading, text excerpt, effective date and link, filterable by title
