CPC Ad Budget Calculator

CPC (Cost Per Click) campaign budgeting involves calculating how many clicks your budget will buy, and projecting the conversions and revenue those clicks will generate. Understanding the relationship between budget, CPC, click volume, conversion rate, and ROI is essential for running profitable paid search or display campaigns.

Click volume formula: Clicks = Budget ÷ Average CPC

Conversions formula: Conversions = Clicks × Conversion Rate

Revenue from campaign: Revenue = Conversions × Average Order Value (AOV)

Return on Ad Spend (ROAS): ROAS = Revenue ÷ Budget

Break-even CPC formula: Max CPC = AOV × Conversion Rate × Target Margin

Where:

• Budget: total campaign spend (daily or total)
• Average CPC: cost per click (varies widely by keyword and competition)
• Conversion Rate: percentage of clicks that result in a purchase or lead (typical e-commerce: 1–3%)
• AOV (Average Order Value): average revenue per conversion
• Target Margin: profit margin you need to maintain (e.g. 0.30 = 30%)

Industry average CPC benchmarks (Google Ads):

• Legal: $6–$15 per click
• Financial services: $4–$12 per click
• Insurance: $8–$20 per click
• E-commerce: $0.50–$3 per click
• Travel: $1–$5 per click
• B2B software: $3–$10 per click

Worked example: E-commerce store. Monthly Google Ads budget: $2,000. Average CPC: $1.20. Conversion rate: 2.5%. AOV: $85.

• Clicks = $2,000 ÷ $1.20 = 1,667 clicks
• Conversions = 1,667 × 0.025 = 41.7 → ~42 orders
• Revenue = 42 × $85 = $3,570
• ROAS = $3,570 ÷ $2,000 = 1.79× (179%)
• Break-even CPC (at 30% margin): $85 × 0.025 × 0.30 = $0.64: current CPC of $1.20 is above break-even, meaning profit margin is compressed. Improving conversion rate to 3.5% would make the campaign profitable.