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ROI calculator (return on investment)

Work out your return on investment as a percentage from the amount invested and the amount returned.

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The ROI calculator (return on investment) turns Amount invested ({cur}), Amount returned ({cur}) into Net profit, ROI (%), instantly and for free. For instance, with Amount invested ({cur}) = 1,000 and Amount returned ({cur}) = 1,300 it returns Net profit = $300.00 and ROI (%) = 30%.

How to use it

  1. Enter your values: Amount invested ({cur}), Amount returned ({cur}).
  2. Read the result instantly: Net profit, ROI (%).

Frequently asked questions

What does the ROI calculator (return on investment) actually compute?

It takes Amount invested ({cur}) and Amount returned ({cur}) and derives Net profit and ROI (%) from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

2 values: Amount invested ({cur}) and Amount returned ({cur}). Nothing else is required — no account, no file upload.

Can you show a worked example?

With Amount invested ({cur}) = 1,000 and Amount returned ({cur}) = 1,300, the calculator returns Net profit = $300.00 and ROI (%) = 30%. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

What happens if I enter larger values?

It moves a lot. Using Amount invested ({cur}) = 2,000 and Amount returned ({cur}) = 2,600 instead, Net profit goes from $300.00 to $600.00 — which is why it is worth testing a few scenarios rather than trusting a single figure.

What does it give for smaller values?

Scaled down to Amount invested ({cur}) = 500 and Amount returned ({cur}) = 650, Net profit comes out at $150.00. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Running the week: issuing an invoice or a quote, knowing what is in stock and what to reorder, and seeing whether cash covers what is due.

What is the most common mistake?

Reading profit as cash. A profitable month with sixty-day payment terms can still leave the account empty — the two numbers answer different questions.

What is the difference between the ROI calculator (return on investment) and the Side hustle ROI calculator?

This one returns Net profit and ROI (%); the Side hustle ROI calculator returns Profit and ROI. That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Return on assets (ROA) calculator is the closest one after this: Compute return on assets from net income and total assets.

What else is worth having open alongside it?

Return on equity (ROE) calculator and Return on net assets calculator — they come up in the same task often enough to be worth a second tab.

Further reading

All guides →
How-toWhat Is ROI and How Do You Calculate It?ROI measures your gain relative to what you invested, as a percentage. Here's the formula, a worked example, and what ROI leaves out.GuideCosting the Return of an Internal Project That Generates No RevenueThe migration, the tooling change, the process fix: the most common business case there is and the least documented. The value is avoided cost plus recovered time — and on a $130,000 migration, 60.5 % of the recovered hours have to be genuinely redeployed before the five-year net present value even reaches zero.ExplainerWhy the Payback Period Lies When the Cash Flows Are UnevenIt throws away everything after the cut-off, ignores the time value of money, and ranks a project that returns early and then dies above one that returns steadily. Computed: payback prefers the worse project by 1.33 years while net present value prefers the better one by $19,571. And the popular shortcut — one divided by the payback — overstates the true return by 17 points on a five-year asset.ComparisonSimple vs Compound Interest: What's the Difference?Simple interest grows in a straight line; compound interest snowballs. Here's how each works, a worked example, and which one you meet in real life.ExplainerThe Rule of 72, ExplainedThe rule of 72 estimates how long money takes to double: divide 72 by the interest rate. Here's why it works, when it's accurate, and how to flip it.ExplainerWhat Is CAGR (and How to Use It)?CAGR turns an investment's whole journey into one steady yearly rate. Here's what it means, the formula, why it's useful for comparing, and what it hides.