ROI Calculator
Enter the amount gained and the cost of the investment to calculate ROI.
How to use this calculator
- 1Enter the total amount returned from the investment.
- 2Enter what the investment cost you.
- 3Read the net return and ROI percentage.
How the ROI Calculator works
Return on investment measures how much you gained relative to what you spent, as a percentage. Spend $3,000, get back $5,000, and your ROI is 66.7%. It is a simple, universal way to compare very different investments — a marketing campaign, a piece of equipment, or a course.
ROI’s weakness is that it ignores time: a 50% return in one month is far better than the same 50% over five years. Use it to compare options of similar duration, and pair it with a time frame whenever the periods differ.
Ready to bill for it?
Create a professional invoice in one sentence with Aviy’s free AI invoice generator.
Create an invoice freeFrequently asked questions
How is ROI calculated?
Subtract the cost from the amount returned to get the net gain, divide by the cost, and multiply by 100. A $3,000 spend returning $5,000 is a 66.7% ROI.
What is a good ROI?
It depends on the risk and time frame. Any positive ROI beats a loss, but compare it against alternatives and how long your money was tied up.
Does ROI account for time?
No — plain ROI ignores how long the investment took. Two investments with the same ROI differ a lot if one took a month and the other took five years.
Related reading

Business Automation Strategy: A Practical 2026 Guide
Build a business automation strategy that actually works in 2026. A step-by-step guide to picking processes, tools and AI without breaking your operations.
Continue Reading
Mobile App Developer Invoice Template: Free Guide and Examples
Use this mobile app developer invoice template to bill milestones, sprints, App Store fees and retainers clearly - with examples and tips to get paid faster.
Continue Reading
Return on Investment (ROI) Explained: Formula, Examples and How to Use It
Return on investment explained simply: learn the ROI formula, see real examples, and discover how to measure what your spending actually earns.
Continue Reading
Return on Investment Forecast: How to Project ROI
Learn how to build an ROI forecast: the formula, worked examples, and how to project ROI before you spend a penny. A practical guide for business owners.
Continue Reading
Best Invoice Apps for Android in 2026
Compare the best invoice apps for Android in 2026. Real selection criteria, features that matter on mobile, and how to pick the right app to get paid faster.
Continue Reading