everyday Calculators
Last updated: September 2026
Love Calculator
A pure-entertainment 'compatibility' score built from two names.
Shoe Size Conversion
Convert a shoe size between US, UK, EU, and JP (Japan) systems.
Pet Age Calculator (Dog + Cat Years)
Convert your dog or cat's age into 'human years' using the modern 2019 UCSD epigenetic-clock formula for dogs, and a common veterinary piecewise chart for cats.
Bill Splitter Calculator
Split a group bill fairly β subtotal, tip percentage, and headcount β into a clean per-person amount.