About this roi calculator
Compare total proceeds with the total cost of an investment or project. Net gain is proceeds minus cost. ROI is net gain divided by cost and multiplied by 100. Use this workspace to prepare a result you can review before putting it to use. All processing takes place on your device, without an account or an upload of your inputs. Check the examples to understand the expected output, read the limitations for the supported scope, and reset the form when you want to start a separate task.
How the roi calculator works
Net gain is proceeds minus cost. ROI is net gain divided by cost and multiplied by 100.
ROI Calculator examples
Cost 1000; proceeds 1200
Net gain 200; ROI 20%
Cost 200; proceeds 150
Net gain -50; ROI -25%
Limitations & privacy
Cost must be 0.01–1 trillion; proceeds 0–1 trillion. Include relevant fees in your inputs. This is not annualized, does not account for cash-flow timing or risk, and is not investment advice.
Inputs and results stay in this browser. Only tool identifiers are stored for your recently used tools. You can clear that history from the directory.
ROI Calculator: frequently asked questions
How does the roi calculator work?
Net gain is proceeds minus cost. ROI is net gain divided by cost and multiplied by 100.
What can I inspect in the roi calculator result?
The investment proceeds reconciliation helps you check the result before using it. Cost must be 0.01–1 trillion; proceeds 0–1 trillion. Include relevant fees in your inputs. This is not annualized, does not account for cash-flow timing or risk, and is not investment advice.
Does the roi calculator upload my input?
Processing happens in your browser. No tool input or output is uploaded to a server. Use Reset to clear the current workspace before starting a separate task.
Updated September 20, 2026