ROI Calculator

What Is ROI and Why Does It Matter?

Return on Investment (ROI) is the most fundamental metric in business and finance. It answers one simple question: for every dollar I put in, how much did I get back?

ROI lets you compare wildly different decisions on a common scale. Should you invest $10,000 in a marketing campaign or a new piece of equipment? Should you hire a freelancer or do the work yourself? Is this side project worth pursuing? ROI gives you a consistent framework to evaluate all of these.

The basic formula:

ROI = (Net Profit ÷ Cost of Investment) × 100
Net Profit = Final Value − Cost of Investment

A 50% ROI means for every $100 invested, you got $150 back — a $50 profit. A negative ROI means you lost money.

Four Inputs, One Answer

Our calculator only needs four things:

Initial Investment — The total amount you put in. Include all costs: purchase price, setup fees, labor costs, tools required.

Final Value (or Return) — What you got back. For a marketing campaign, it's revenue generated. For a stock, it's the sale price. For real estate, it's the selling price.

Time Period — How long did the investment last? Optional, but needed for annualized ROI.

Recurring Costs — Any ongoing costs during the investment period (maintenance, subscription fees, operating costs) that should be subtracted from returns.

ROI vs. Annualized ROI

A raw ROI percentage doesn't account for time. A 50% ROI over one year is very different from a 50% ROI over ten years.

Annualized ROI converts the return into a yearly percentage, allowing fair comparison:

Annualized ROI = ((1 + ROI)^(1/n) − 1) × 100
where n = number of years

Example:

• Project A: 80% ROI over 2 years → 34% annualized
• Project B: 40% ROI over 1 year → 40% annualized

Project B is actually better on an annualized basis, even though Project A shows a larger raw percentage.

Marketing ROI: The Most Common Use Case

For marketers, ROI answers whether campaigns are worth running. The standard calculation:

Marketing ROI = ((Revenue from Campaign − Campaign Cost) ÷ Campaign Cost) × 100

Example: You spend $5,000 on an ad campaign. It generates $18,000 in attributable revenue. Gross profit on those sales is $6,000 (after cost of goods).

Marketing ROI = (($6,000 − $5,000) ÷ $5,000) × 100 = 20%

What's a good marketing ROI? The 5:1 ratio of revenue to spend (500% revenue ROI) is commonly cited as the benchmar...