Free Google Ads Budget Calculator
Plan your Google Ads spend with confidence. Forecast clicks, conversions, and revenue based on your goals and performance metrics.
Budget Efficiency Score
Google Ads Benchmarks by Industry
Use these industry benchmarks to validate your inputs. If you're unsure about your average CPC or conversion rate, start with your industry average and adjust as you gather real campaign data.
| Industry | Avg CPC (Search) | Avg Conv. Rate | Avg CPA |
|---|---|---|---|
| eCommerce / DTC | $0.50–$3.00 | 2.5–4.5% | $15–$80 |
| SaaS / Software | $3.00–$15.00 | 2.0–5.0% | $50–$300 |
| Health & Beauty | $1.00–$4.00 | 3.0–5.5% | $20–$70 |
| Home Services | $3.00–$12.00 | 4.0–8.0% | $30–$150 |
| Legal Services | $5.00–$50.00 | 3.0–6.0% | $80–$500+ |
| Real Estate | $1.50–$5.00 | 2.0–4.0% | $40–$200 |
| Fashion & Apparel | $0.60–$2.50 | 2.0–4.0% | $20–$80 |
How to Plan Your Google Ads Budget
Setting the right Google Ads budget is one of the most important decisions in paid search marketing. Spend too little and you won't generate enough data to optimize. Spend too much without proper tracking and you'll waste money on underperforming campaigns. This calculator helps you work backwards from your revenue goals to find the right budget.
The Revenue-First Approach to Budgeting
The most reliable way to set your Google Ads budget is to start with your revenue target and work backwards. Instead of picking an arbitrary number, ask: "How much revenue do I want Google Ads to generate, and what ROAS can I realistically achieve?" Divide your revenue goal by your target ROAS, and you have your monthly budget.
You can then validate that budget against your CPC and conversion rate. Your budget divided by CPC gives estimated clicks. Multiply clicks by conversion rate for estimated conversions. Multiply conversions by average order value, and you should arrive back at approximately your revenue goal.
What ROAS Should You Target?
Your target ROAS depends on your profit margins. If your gross margin is 60%, you need at least a 1.67x ROAS to break even on product costs alone. Once you factor in shipping, overhead, and other costs, most eCommerce brands need 3x–5x ROAS for profitability. Branded search campaigns often achieve 8x–15x, while prospecting campaigns may run at 2x–4x.
- Branded Search: 8x–15x ROAS (lowest CPC, highest intent)
- Non-Branded Search: 3x–6x ROAS (moderate CPC, high intent)
- Shopping / PMax: 3x–8x ROAS (varies by product and competition)
- Display / YouTube: 1x–3x ROAS (awareness-focused, lower direct return)
How to Lower Your CPA on Google Ads
- Improve your Quality Score: Higher quality scores lower your CPC. Focus on ad relevance, landing page experience, and expected CTR.
- Optimize your landing pages: Even a 0.5% improvement in conversion rate can dramatically reduce CPA. Test headlines, CTAs, page speed, and trust signals.
- Use negative keywords: Prevent your ads from showing for irrelevant searches. Review your search terms report weekly and add negatives aggressively.
- Segment your campaigns: Separate branded vs. non-branded, top-of-funnel vs. bottom-of-funnel. Each needs different bids, budgets, and expectations.
- Test bid strategies: Start with manual CPC or maximize clicks to gather data, then graduate to target ROAS or target CPA once you have 30+ conversions per month.
Daily vs. Monthly Budget Planning
Google Ads sets budgets at the daily level, but you should plan monthly. Google can spend up to 2x your daily budget on any given day during high-traffic periods, but guarantees it won't exceed your daily budget multiplied by 30.4 in a calendar month. To set your daily budget, divide your monthly target by 30.4.
Frequently Asked Questions
Your ideal budget depends on your revenue goals, target ROAS, and average CPC. Work backwards from your revenue target: divide it by your target ROAS. Most eCommerce brands invest 5–15% of total revenue in Google Ads, but the right amount varies by growth stage, margin, and competition.
A good ROAS varies by campaign type. Branded search typically achieves 8x–15x, non-branded search 3x–6x, Shopping/PMax 3x–8x, and Display/YouTube 1x–3x. Your break-even ROAS depends on your profit margins — most brands need at least 2x–3x to be profitable after all costs.
Monthly Budget = Revenue Goal ÷ Target ROAS. Then validate: Budget ÷ CPC = Clicks, Clicks × Conversion Rate = Conversions, Conversions × AOV = Revenue. If the estimated revenue matches your goal, your budget is properly sized.
Average CPC varies widely: eCommerce $0.50–$3.00, SaaS $3–$15, legal $5–$50+, home services $3–$12. Shopping ads tend to have lower CPCs ($0.30–$1.50) than Search. Use Google Keyword Planner for accurate estimates in your niche.
Plan monthly, but Google Ads uses daily budgets. Divide your monthly budget by 30.4 to get your daily limit. Google may spend up to 2x daily on peak days but won't exceed the monthly cap (daily × 30.4).
Need Help Scaling Google Ads?
We manage Google Ads for eCommerce brands spending $10K–$1M+/month. Let us audit your account and find growth opportunities.
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