Google Ads budget calculator
Stop guessing a daily budget. Start from your revenue or leads goal and see exactly what it costs - clicks, conversions, and monthly spend.
Google Ads budget calculator
Work backwards from a goal to the budget it needs - or forward from a budget to the results it should produce.
Average cost per click.
Clicks that turn into a lead/sale.
CPC and conversion rate are required.
Quick answer: A Google Ads budget calculator works backwards from your goal: divide your revenue target by your average order value to get the sales you need, divide that by your conversion rate to get clicks needed, then multiply by your average CPC. The result is the monthly budget your goal actually requires - before you launch.
The budget formula, step by step
Most advertisers pick a daily budget out of thin air. The reliable way is to start from the outcome and divide back:
Sales needed = Revenue goal ÷ Average order value
Clicks needed = Sales needed ÷ Conversion rate
Required budget = Clicks needed × Average CPC
For a leads goal you skip the order-value step and divide leads by your conversion rate directly. The calculator above runs this both ways - enter a goal to get the budget, or enter a budget to project the clicks, conversions, and cost per lead it should produce.
Typical CPC by industry (rough 2026 guide)
| Industry | Typical search CPC |
|---|---|
| Ecommerce / retail | $0.50 - $2 |
| Local services / home services | $2 - $8 |
| B2B / SaaS | $3 - $15 |
| Finance / insurance | $5 - $50 |
| Legal | $10 - $100+ |
CPCs vary by location, competition, and quality score. Use your own account data once you have it; these are starting estimates only.
Why the conversion rate matters most
Of the three inputs, conversion rate is the one you most control - and it has the biggest leverage on cost. Doubling your conversion rate halves the clicks (and therefore the budget) needed to hit the same goal. That's why a faster, clearer landing page often beats bidding more: the same traffic produces more customers, lowering your cost per lead and lifting ROAS without spending another dollar on media.
Frequently asked questions
- How do I calculate my Google Ads budget?
- Work backwards: revenue goal ÷ order value = sales; ÷ conversion rate = clicks; × CPC = budget.
- How much should a small business spend?
- It depends on your goal, CPC, and conversion rate. Start from the outcome you need; many start at $1,000-$5,000/month and scale winners.
- What's a good CPC?
- Often $1-$3, but $5-$50+ in competitive niches. Use your own data where possible.
- Budget vs bid?
- Bid is the max you pay per click; budget is the total you spend over a period.
- Why start from a goal?
- It ties spend to an outcome and shows whether your target is realistic before you spend.
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