ROAS calculator
Calculate return on ad spend and the contribution left after your entered costs.
How the calculation works
ROAS = attributed revenue ÷ ad spend. Contribution after entered costs = revenue × margin − ad spend − other campaign costs.
What to include
Use revenue and spend from the same period and attribution window. ROAS measures revenue, so a high ratio can still lose money when margins are low. Enter your margin after variable product and fulfillment costs; fixed overhead is not included.
Your inputs are calculated locally. We do not submit them or include them in analytics. These tools estimate advertising economics; they do not predict campaign performance.