ROAS Calculator
Work out your return on ad spend from advertising spend and advertising revenue.
ROAS
4:1
- As a percentage
- 400%
- Revenue per £1 spent
- £4.00
v1.0 · Reviewed September 2026
How this is worked out
Return on ad spend is revenue ÷ spend, shown as a ratio, a percentage and the revenue earned for each £1 spent.
Worked example
- Advertising spend £1,000.00
- Advertising revenue £4,000.00
4,000 ÷ 1,000
4:1, or £4.00 of revenue per £1 spent
Assumptions and limits
- Uses revenue, not profit. A strong ROAS can still lose money once the cost of goods is taken off.
- Attribution comes from whatever revenue figure you enter, so it inherits the limits of your tracking.