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ROI Calculator

Enter the revenue generated and the cost to get your marketing ROI % and net profit — a simple check on whether spend is paying off.

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ROI
Net profit

How to calculate ROI

ROI = (Revenue − Cost) ÷ Cost × 100. £5,000 from £1,000 spend is a 400% ROI and £4,000 net profit. For ad-only returns, use ROAS instead.

ROI vs ROAS

ROI is net (after cost) as a percentage of investment; ROAS is gross revenue per £1 of ad spend. Both are useful — ROI for the whole picture, ROAS for bidding.

Frequently asked questions

How do I calculate ROI?

Subtract cost from revenue, divide by cost, multiply by 100.

What’s the difference between ROI and ROAS?

ROI measures net return on total investment; ROAS measures gross revenue per pound of ad spend.

Is this free?

Yes — no sign-up.

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