Percentage calculator
Calculate percentages online, including percent of a number, percentage increase, and percentage decrease.
ROI calculator
Calculate return on investment, net profit, and annualized ROI (CAGR) from what you invested and what you got back.
For annualized ROI
How to use ROI calculator
Calculate the return on investment (ROI) of any purchase, project, or asset.
ROI = (final value − total cost) ÷ total cost × 100
Add the holding period to see the annualized ROI (compound annual growth rate). That lets you compare investments held for different lengths of time: a 50% gain over 5 years is about 8.4% a year.
ROI calculator FAQs
Is ROI calculator free?
ROI calculator is a free online tool on ReallyUseful.Tools. No account is required.
Does ROI calculator run in my browser?
ROI calculator is designed to run in your browser where supported, so files can stay on your device instead of being uploaded to a server.
More Calculators
Age calculator
Calculate exact age from date of birth in years, months, days, and more with a simple online age calculator.
BMI calculator
Calculate your BMI online using height and weight. Get body mass index results with metric and imperial units.
Mortgage calculator
Estimate monthly mortgage payments with loan amount, interest rate, term, deposit, taxes, and fees.
Loan calculator
Calculate loan payments, total interest, and repayment schedules for personal loans and other borrowing.