💠 ROI Calculator
Calculate return on investment: profit (or loss) and the percentage return relative to the initial amount invested.
📈Finance & Business
Mortgage, interest, ROI and payroll calculators plus IBAN/VAT validation and financial reference data.
📈 CAGR Calculator
Calculate the compound annual growth rate that takes an initial value to a final value over a given number of years — the standard way to annualize returns.
🏷️ Margin & Markup Calculator
Calculate gross profit, profit margin (profit as % of price) and markup (profit as % of cost) from a unit cost and selling price — the two numbers people constantly mix up.
🏦 IBAN Validator
Validate an International Bank Account Number: country code, country-specific length and the ISO 7064 MOD 97-10 check digits — with the pretty-printed grouping returned when valid.