Percentage calculator - percent change between two numbers, percent of a number, what percent one number is of another, and increase or decrease by a percentage

Hourly payroll calculator - regular and overtime hours, gross pay and optional withholding estimate

Length converter - convert between miles, kilometers, feet, meters, inches, yards and nautical miles with all equivalents

Marketplace and payment processor fee schedule - Amazon, eBay, Etsy, Shopify, Stripe fees as percent and fixed rates, with optional per-sale seller net

Loan amortization schedule calculator - monthly payment, total interest, payoff time and first 12 payments, with savings from an extra monthly payment

Inflation calculator - future cost of today's money and purchasing power loss over years at a given inflation rate

Break-even calculator - contribution margin, break-even units and revenue, and target-profit units

End-of-life dates for software - check whether a version of Node.js, Python, Ubuntu, Java, PostgreSQL and 400 other products is still supported, with LTS and latest release

Solunar fishing and hunting forecast - moon phase, illumination and major and minor activity windows

Retail markdown and stacked discount calculator - final price, tax and savings

pub.dev package info - latest Dart or Flutter package version, license, likes, 30-day downloads, pub points, dependencies and platforms

Homebrew formula info - version, description, license, dependencies and install command for any brew formula

Hex package info - latest Elixir or Erlang package version, licenses, downloads, owners, retirements and mix.exs dependency snippet

VIN decoder - make, model, year, trim, body, engine, drivetrain, plant and safety equipment for any 17-character VIN, with check-digit validation (NHTSA vPIC)

Indian mutual fund NAV - latest NAV, fund house, category and 1, 3 and 5 year returns for any AMFI scheme code

Wikipedia pageviews for an article - daily human views, total, peak day and week-over-week attention trend for up to a year

RubyGems package info - latest version, downloads, authors, license, runtime dependencies and links for any Ruby gem

Pokemon data - types, base stats, abilities, height, weight, generation, legendary status and Pokedex entry by name or number

NuGet package info - latest stable and prerelease version, total downloads, authors, tags, license and recent stable versions for any .NET package

India PIN code lookup - district, state, region and the post offices for any 6-digit pincode