ROI Calculator (Return on Investment)
See exactly what an investment earned you. Enter what you put in and what you got back to find your net profit, ROI percentage, annualized ROI, and total return multiple — all updating instantly as you adjust the sliders.
How the ROI calculator works
Return on investment (ROI) is the simplest way to answer the question every owner asks: was this worth it? It compares the money you got back to the money you put in, expressed as a percentage so you can compare very different investments on the same scale.
ROI % = (Net profit ÷ Invested) × 100
Annualized ROI % = ((Returned ÷ Invested)1÷years − 1) × 100
The basic ROI number tells you the total percentage gain over the whole life of the investment. The total return multiple restates that as a simple factor — getting $15,000 back on a $10,000 investment is a 1.5x return — which is often the fastest way to grasp the result at a glance.
Why annualized ROI matters
A 50% total return sounds great, but it means something very different if it took six months versus ten years. That is what annualized ROI fixes: it spreads the gain evenly across the years you held the investment, so you see the average return per year. A 50% return earned over three years works out to roughly 14.5% per year — still solid, but a more honest basis for comparison. When you weigh one opportunity against another, always line up the annualized figures, because a shorter holding period does a lot of quiet work.
What affects your ROI
- How much you invested — the denominator. Two investments can produce the same dollar profit but wildly different ROIs.
- How much came back — include everything you actually received: sale proceeds, income, and any residual value.
- How long it took — time does not change basic ROI, but it dramatically changes annualized ROI.
- Costs you might forget — fees, taxes, and maintenance reduce the true amount returned. Enter the net figure for an accurate result.
Tips for using ROI wisely
- Use the net amount returned — after fees and taxes — not the gross.
- Compare the break-even point before you commit capital.
- For financed purchases, check the true cost of borrowing, since interest eats into your real return.
- For multi-year cash flows, treat basic ROI as a headline and lean on annualized ROI for decisions.
Frequently asked questions
How do you calculate ROI?
ROI is net profit divided by the amount invested, times 100. Net profit is the amount returned minus the amount invested. For example, investing $10,000 and getting back $15,000 is a $5,000 net profit, which is a 50% ROI.
What is annualized ROI and why does it matter?
Annualized ROI shows your average yearly return over the holding period, so you can compare investments of different lengths fairly. It is calculated as (amount returned / amount invested) raised to the power of (1 / years), minus 1, times 100. A 50% total return earned over 3 years is only about 14.5% per year.
What is a good ROI for a small business?
There is no single number, because a good ROI depends on the risk and the time it took. Many small business owners look for a return that comfortably beats safer alternatives after accounting for the effort and risk involved. Always compare the annualized ROI, not just the total ROI.
Does ROI account for the time value of money?
Basic ROI does not; it only compares dollars in to dollars out. Annualized ROI adds the time dimension so a fast return looks better than a slow one. For cash flows spread across many periods, a full internal rate of return or net present value analysis is more precise.
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This calculator is for educational and informational purposes only and does not constitute financial, investment, or tax advice. Estimates are based on the values you enter. Confirm all figures with a qualified professional before making decisions.