Ad Spend as % of Revenue
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Results are estimates for informational purposes only and may be rounded.
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Calculate ad spend as a percentage of revenue. Useful for tracking marketing efficiency and setting budgeting benchmarks.
Use this calculator when you need a fast, reliable answer without opening a spreadsheet. Enter your figures below and press Calculate. PercentNinja shows the key outputs you typically need for pricing decisions, VAT checks, ecommerce payouts or ad reporting.
When to use this
- Monitoring ad efficiency (CTR, CPC, CPM, eCPM) across campaigns
- Setting KPIs and break-even targets before scaling spend
- Comparing performance between channels using consistent metrics
Worked examples
Example 1
Question: Spend £500 on revenue £5,000.
- % = 500 ÷ 5,000 × 100 = 10%
Example 2
Question: Spend £120 on revenue £800.
- % = 120 ÷ 800 × 100 = 15%
Frequently asked questions
How do you calculate ad spend as a percentage of revenue?
Divide total ad spend by total revenue and multiply by 100: (ad spend ÷ revenue) × 100.
Why must revenue be greater than zero?
Revenue is the divisor; it must be a positive number to produce a meaningful percentage.
What is a healthy ad spend percentage of revenue?
It varies by industry, margin, and growth goals. Use this metric as a benchmark alongside ROAS, CPA, and net profit.