How to Calculate Keyword ROI for SEO and PPC

Model clicks, conversions and profit from keyword assumptions. Compare ROI with ROAS and calculate a break-even CPC.

Understand the method

Set one monthly period and one currency. Search volume and click-through rate estimate clicks; clicks and conversion rate estimate orders. These are assumptions, not observations. Start with measured conversion and margin data where available, and try lower CTR and conversion rates to see how sensitive the result is.

Worked calculation

With 1,000 searches, 10% CTR and 5% conversion, expect 100 clicks and 5 orders. At order value 100, revenue is 500. A 40% gross margin leaves 200 before campaign cost. Spending 100 gives profit 100 and ROI 100%. ROAS is 500 ÷ 100 = 5, so a high ROAS does not mean the same percentage profit.

Practical checks

For PPC, total cost is clicks × CPC plus fixed cost. At CPC 2 and fixed cost 100, these 100 clicks cost 300 and profit becomes −100. The break-even CPC after fixed cost is (200 − 100) ÷ 100 = 1. A negative break-even CPC means fixed costs already exceed projected gross profit. Do not add overlapping keyword volumes as if every search were independent.

Use the free tool

Choose SEO or PPC. Enter monthly search volume, CTR, conversion rate, order value, gross margin and campaign cost.

Formula reference

Clicks = volume × CTR. Revenue = clicks × conversion rate × order value. Net profit = revenue × gross margin − total cost. ROI = net profit / cost × 100. PPC cost = clicks × CPC + fixed cost.

Limits

Scenario model only: no keyword data or rankings are fetched. Use one currency and one monthly period. Expected conversions can be fractional. ROI is undefined when total cost is zero.