Free calculator

Google Ads ROI calculator

Enter Google Ads spend, attributed revenue, and optional product costs to estimate ROI and whether the budget is buying profit — not just clicks.

Google Ads ROI

Plan Google Ads budget with CPC, conversion rate, AOV, and margin. Free Google Ads ROI / PPC budget calculator.

Monthly budget

Avg CPC ($)

Conversion rate (%)

AOV ($)

Gross margin (%)

Clicks

3333

Conversions

83.3

Revenue

$5,833.33

ROAS

1.17×

Net after ads

$-2,666.67

At this funnel, expected ROAS is 1.17× and net contribution after ads is $-2,666.67. Upload POAS values so Smart Bidding trains on profit, not revenue alone.

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ROI vs ROAS for Google Ads

ROI typically means (return − cost) ÷ cost. For ads, “return” should be profit when possible: (gross profit − ad spend) ÷ ad spend. ROAS uses revenue in the numerator and ignores COGS.

Budget decisions improve when you convert ROAS ambitions into profit ROI and break-even floors by margin band.

Revenue ROI-style ROAS = revenue ÷ spend
Profit ROI ≈ (gross profit − spend) ÷ spend
Upload profit values for Smart Bidding alignment

Planning budget from ROI

If profit ROI is negative at current CPC and CVR, more budget amplifies losses. Fix feed quality, labels, and COGS signals first — then scale campaigns that clear POAS targets.

Frequently asked questions

What is Google Ads ROI?

Google Ads ROI measures return relative to ad cost. Prefer profit-based ROI (profit after ads ÷ ad spend) over revenue-only ROAS when judging whether PPC is working.

How do you calculate Google Ads ROI?

For profit ROI: subtract COGS from attributed revenue to get gross profit, subtract ad spend, then divide by ad spend. Example: $10,000 revenue, $6,000 COGS, $2,000 spend → $2,000 after ads → ROI = 100%.

What is a good Google Ads ROI?

Positive profit ROI is the floor. Many brands target a buffer above break-even POAS so contribution covers overhead. Compare to your margin structure, not a generic “good ROAS” chart.