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Calculate ROI Online

Calculate return on investment from cost and return

Enter cost and return, then click Calculate

About This Tool

ROI Calculator computes return on investment as (Return − Cost) ÷ Cost × 100. Optionally see net profit (Return − Cost). Use it for campaigns, projects, or inventory buys. Everything runs locally in your browser — numbers never leave your device.

How to Use

  1. Enter your total cost or investment
  2. Enter the return or revenue you received
  3. Click Calculate to see ROI % and net profit
  4. Adjust inputs to compare scenarios
  5. Clear to start over

Common Use Cases

  • Marketing: Compare campaign ROI across channels
  • Business: Evaluate project or product investments
  • Ecommerce: Measure inventory or promo returns
  • Freelance: Check whether a gig was profitable
  • Planning: Model break-even style what-if ROI

FAQ

Q1: How is ROI calculated?

ROI% = (Return − Cost) ÷ Cost × 100. Net profit is Return − Cost.

Q2: ROI vs ROAS — what is the difference?

ROAS is revenue ÷ ad spend. ROI uses (return − cost) ÷ cost and can include all costs, not only ads.

Q3: Is my data uploaded?

No. All calculations are processed locally in your browser and never uploaded.

Q4: Why do I see a divide-by-zero message?

Cost must be a non-zero number; otherwise ROI is undefined.

Related Tools

ROAS CalculatorProfit Margin CalculatorBreak-Even CalculatorMarkup Calculator