📊 ROI Calculator

The ROI Calculator expresses the return on an investment as a percentage and a net gain, from the amount you put in and the amount you got back. It gives a quick, comparable measure of how well money was used — whether that is an ad campaign, a piece of equipment, or a project.

How to Use This Tool

Enter the amount invested and the amount returned (the total value you got back). The tool shows the net return and the ROI as a percentage.

What This Tool Checks

Net return = returned − invested; ROI = net return ÷ invested × 100. Simple, exact arithmetic.

Understanding Your Results

A positive ROI means you got back more than you put in; 100% ROI means you doubled your money. ROI ignores time, so a 50% ROI over one month is far better than 50% over five years — compare like periods.

How to Fix Common Problems

If ROI looks off, make sure "returned" is the total value received, not just the profit. For marketing, decide whether "returned" is revenue or gross profit — the two give very different ROI figures and you should be consistent.

SEO Best Practices

For marketing, ROI on gross profit is more honest than ROI on revenue, because revenue does not account for the cost of goods. Always note the time period alongside the percentage so comparisons are fair, and include all costs in "invested".

Example

Invest $5,000, get back $8,000: net return $3,000, ROI 60%. If that $8,000 is revenue but the goods cost $4,000, the ROI on profit is much lower — which is why defining "returned" matters.

Common Mistakes to Avoid

Comparing ROIs from different time spans as if they were equal. Using revenue instead of profit for "returned" overstates marketing ROI.