ROI Calculator
Calculate roi with reusable inputs and a clear result. This free calculator runs locally, keeps inputs in page memory and does not send entered amounts to analytics.
🔒 100% private — files never leave your browser
Result
- Net gain
- 200
- ROI
- 20
Values stay in this page memory. Copy the result before leaving or refreshing.
Formula
ROI = (final value − original investment) ÷ original investment × 100
Worked example
$1,200 final value on a $1,000 investment = 20% ROI.
How to interpret the result
Calculate roi with reusable inputs and a clear result. This free calculator runs locally, keeps inputs in page memory and does not send entered amounts to analytics.
How to use the ROI Calculator
- 1 Enter the values for the calculation.
- 2 Review the formula and worked example below the form.
- 3 Copy the result before leaving or refreshing.
Frequently asked questions
What is the roi formula?
ROI = (final value − original investment) ÷ original investment × 100.
Are my entered amounts uploaded?
No. The calculation runs in your browser. New calculations do not write inputs into the address.
Is this financial, tax or medical advice?
No. This is a general arithmetic tool. Verify business decisions and local requirements with qualified sources.