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Free ROAS Calculator

Calculate return on ad spend and break-even targets from ad spend and attributed revenue inputs.

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Tool 01

ROAS Calculator

Calculate return on ad spend from revenue and advertising cost.

ROAS Calculator

Calculate return on ad spend from revenue and media costs.

Revenue from ads

Ad spend

ROAS results

ROAS ratio

4.00x

ROAS %

400.0%

Revenue - Spend

9600.00

{
  "error": null,
  "roas": 4,
  "roasPercent": 400,
  "profit": 9600,
  "revenue": 12800,
  "adSpend": 3200
}

How it works

ROAS Calculator: methodology and worked example

How this tool computes its result

roas = revenue / adSpend; roasPercent = roas × 100; profit = revenue − adSpend. Validation requires adSpend > 0 ("Ad spend must be greater than zero.") and revenue ≥ 0 ("Revenue cannot be negative."). The tool treats whatever number you enter as "revenue" as fully attributable to the ad spend — it has no concept of blended vs. paid-only revenue.

Worked example

Revenue $12,800, ad spend $3,200: roas = 12800/3200 = 4.00x, roasPercent = 400.0%, profit (revenue − spend) = $9,600.

When not to use this tool

If you enter total company or blended revenue instead of revenue specifically attributable to the ad spend being measured, ROAS will be inflated with no warning — the calculator has no attribution model, it just divides whatever two numbers you give it.

Common mistakes

- Entering adSpend = 0 (e.g. an organic-only period) — blocked outright with a validation error rather than showing an infinite or undefined ratio.
- Using total/blended revenue rather than ad-attributed revenue, which produces a misleadingly high ROAS.
- Confusing this tool's "profit" tile (a flat revenue − spend subtraction) with return on investment as a percentage — for margin-aware profitability framing, the separate ROI Calculator computes (revenue − cost)/cost as a percentage instead.

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