Calculators

Quick, everyday calculations — the kind you'd otherwise reach for a spreadsheet or a search engine to sort out. These calculators cover percentages, age, BMI, unit conversions, live currency exchange rates, and loan/EMI payments, each doing one specific job well rather than trying to be an all-purpose calculator. Every result updates instantly as you type, with no page reload and no submit button to wait on.

Like the rest of ConvertKoro, these run in your browser rather than on a server — the math happens locally, with no account needed and no limit on how many times you can use them. The one exception is the Currency Converter, which fetches a live exchange rate from a public rate provider each time you load the page, since exchange rates genuinely change day to day.