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ROI Calculator

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Free Marketing ROI Calculator

Enter 4 numbers. See exactly what a realistic growth programme does to your monthly and 12-month revenue. Live calculation, no email gate.

Your numbers today

Monthly website visits

Conversion rate (%) %

Average order value (£)

Target traffic growth (%) over 12 months %

Your projected ROI

Current monthly revenue

Projected monthly revenue

per month uplift

12-month revenue uplift

Want us to help hit these numbers?

Pop in your details and we'll send a tailored plan for how to get there.

Thanks, we've got your numbers.

Your tailored plan will hit your inbox within 24 hours.

How it works

How the marketing ROI calculator works

The marketing ROI calculator uses your three core revenue inputs — monthly visits, conversion rate, and average order value — to model what your business looks like today, then applies a traffic-growth target to project the monthly and 12-month uplift. The maths is transparent: monthly revenue equals visits × conversion rate × AOV, and we apply the growth target to traffic only (the most realistic assumption for a marketing programme).

Slide each input to reflect your actual numbers. The projected revenue, monthly uplift, and 12-month uplift update live — so you can quickly model best-case and worst-case scenarios before you invest a pound.

The formula

The marketing ROI formula explained

Current monthly revenue = visits × conversion rate × average order value

Projected monthly revenue = (visits × (1 + growth %)) × conversion rate × AOV

Monthly uplift = projected − current

12-month uplift = monthly uplift × 12

The output is the additional revenue your business should generate if you can hit the traffic growth target. To convert that to ROI, divide by your annual marketing spend and multiply by 100 — most healthy marketing programmes target a 4–10× return within 12 months.

Why it matters

Why calculate your marketing ROI before investing

Marketing without a number on it gets cut first when budgets tighten. A clear projection gives finance, the founder, or the board a real answer to "what do we get back?" — and forces you to be honest about whether the channel mix you're considering can move the maths.

Use the calculator before signing any agency, before launching a paid campaign, and quarterly as a board-ready KPI check. If the projected uplift can't justify the spend, the channel is wrong, the goal is unrealistic, or your unit economics need fixing first.

After the calculation

How to use your ROI projection

Map the uplift back to a channel: SEO usually delivers compounding mid-term growth at low cost per acquisition; PPC delivers fast but flattens; paid social is the cheapest test-and-learn channel for new offers. Choose the mix that hits the growth target inside your time horizon.

Need help getting from a number to a plan? Book a free 30-minute strategy call — we'll talk through your inputs, sense-check the projection, and recommend the cheapest path to the uplift.

FAQ

Frequently asked questions

A marketing ROI calculator models the revenue impact of a growth programme based on your current website traffic, conversion rate and average order value, then projects how a realistic traffic uplift translates into monthly and annual revenue. It is the fastest way to sanity-check whether a marketing investment will pay back.

The standard formula is (revenue gained − marketing spend) ÷ marketing spend × 100. Our calculator flips it: instead of asking what you spent, it asks what your current numbers look like and what growth you want, then computes the monthly and 12-month uplift you would see at that growth rate.

Four numbers: your current monthly website visits, your current conversion rate (% of visits that become buyers or leads), your average order value (or average customer lifetime value), and the traffic growth target you want to model over the next 12 months.

For a business starting from a healthy baseline, 50–100% organic growth over 12 months is achievable with senior-led SEO and content. PPC and paid social can lift faster but plateau sooner. Combined channels often hit 150–300% if you start from a low base.

It is a directional model, not a forecast. The maths is correct, but real-world results depend on conversion-rate stability, seasonality, and the specific channels you invest in. Treat the output as a benchmark for a board conversation, not a contractual promise.

Yes — fully free, no signup needed to use the calculator. If you want us to send a tailored plan for how to hit your projected numbers, we ask for your email at the end. You can use the tool freely without that step.

For digital marketing across SEO, PPC and paid social, a healthy benchmark is 4–10× return on spend within 12 months once the programme is mature. SEO compounds — year-two ROI is typically 2× year-one. PPC delivers faster but with a lower ceiling.