ROI Calculator
Calculate your Return on Investment (ROI) percentage and net profit from any initial investment and final value.
Reviewed October 7, 2026 Runs in your browser — inputs are never stored
Return on investment
30.00%
- Net profit / gain
- $3,000.00
- Initial investment
- $10,000.00
- Final value
- $13,000.00
Initial investment vs. net gain
30.0%
ROI
This tool provides general financial estimates for educational purposes only and is not personalized financial, tax, or investment advice. Consult a licensed financial professional before making major financial decisions.
About the ROI Calculator
An ROI (Return on Investment) calculator is a business and finance tool that measures the profitability of any investment as a percentage. It is built for investors comparing assets, entrepreneurs evaluating projects, marketers assessing campaign spend, and anyone deciding whether a purchase or effort was worthwhile. Enter what you originally invested and what it is worth now (or sold for), plus any extra costs, and the calculator returns your net profit and ROI percentage using the standard formula. The result lets you compare very different opportunities on a common scale, regardless of their size or type. Because simple ROI does not factor in time, inflation, or taxes, the tool is best used to compare investments over similar horizons; for longer periods, an annualised or time-weighted measure gives a fairer picture. By making the maths instant and transparent, the calculator helps you focus on outcomes rather than arithmetic. All figures stay private in your browser. For complex or high-value decisions, seek advice from a qualified financial professional.
How to use it
- 1Enter the amount you invested (cost basis).
- 2Enter the current or exit value (or net profit if the tool asks for gain).
- 3Include fees or costs if you want a true net ROI.
- 4Calculate to get ROI % and absolute gain or loss.
- 5Compare multiple scenarios with the same cost basis for a fair ranking.
Worked example
you invest $5,000 in a campaign that returns $6,800 in attributable revenue. Net profit is $1,800 and ROI is 36% (($6,800 − $5,000) ÷ $5,000). If fees were $200, true net ROI falls to about 32% — always net out costs before celebrating a headline return.
How it works
Formula
ROI (%) = ((Final Value − Initial Investment) ÷ Initial Investment) × 100
How it works
Enter what you originally invested and what it is worth now (or what you sold it for). Add any extra costs or fees to see your true net profit and ROI percentage.
Who it is for
Investors comparing assets, entrepreneurs evaluating projects, marketers assessing campaign spend, and anyone deciding whether a purchase, effort, or campaign was worthwhile.
Why it helps
ROI puts very different opportunities on a common percentage scale so you can compare them fairly, regardless of size — something absolute profit figures hide.
Tips for better results
- Include all extra costs (fees, taxes, time) in the costs field so your net profit reflects the true investment.
- Compare investments over similar timeframes — simple ROI ignores duration, so a 20% ROI in one year beats 20% over five.
- For marketing, enter total ad spend as the initial investment and revenue generated as the final value.
- Use a negative result as a signal to review the decision, not just a number to ignore.
Common mistakes to avoid
- Forgetting to subtract additional costs and fees from the final value before calculating net profit.
- Comparing ROI across investments with very different time horizons without annualising.
- Confusing ROI with annualised return — a 100% ROI over 10 years is only ~7% per year.
- Ignoring opportunity cost — the same capital might have earned more in a benchmark alternative.
Frequently asked questions
A:It depends on the investment type and your risk tolerance, but a positive ROI generally indicates a profitable investment.
A:No — this simple ROI formula does not factor in investment duration, inflation, or taxes. Compare investments over similar timeframes.
A:Yes — enter your total spend as the initial investment and total revenue generated as the final value.
Reviewed for accuracy · Last updated October 7, 2026
Formulas follow standard amortization, present/future value, and compounding mathematics used throughout the financial industry, and are periodically checked against reference calculations.
CalcWisee Editorial Team
Calculator development and formula review
CalcWisee is an independent site founded by Ayman. Every calculator is built from a published formula or official definition, tested against hand-worked examples before it goes live, and corrected promptly when a reader reports an issue to ayman@calcwisee.com.
Expertise: Financial mathematics, Health and fitness formulas, Applied mathematics, Unit conversion standards
References & sources
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