Free Ad Profit Calculator: Break-Even ROAS, CPA & CPC
Ad Profit Calculator
Project ad-driven revenue, contribution profit, break-even ROAS, maximum CPA, and maximum CPC from your own unit economics.
Your inputs
Model one paid acquisition scenario
Use contribution margin, not revenue alone. Variable cost can include fulfillment, payment fees, or other per-order costs not already reflected in gross margin.
Core break-even formula
Break-even ROAS = 1 ÷ contribution margin
Contribution margin is gross profit per order after the additional variable cost entered above.
Live result
Projected profit and acquisition limits
This is a planning model. It does not include attribution uncertainty, refunds, fixed overhead, or future changes in auction cost.
Contribution after ad spend
$950
Projected contribution covers the planned ad spend.
Projected ROAS
3.00×
1.54× break-even ROAS
Projected revenue
$3,000
30 orders from 1,000 clicks
Maximum CPA
$65.00
Contribution available to acquire one order
Maximum CPC
$1.95
Break-even CPC at the conversion rate entered
How the scenario moves
Continue with live account data
Turn this result into a reviewable task
Copy the task, then use BizSidekick in your AI app to compare it with connected ad and store data. Start free means you can install the Plugin without making a payment.
Quick answer
An ad profit calculator connects media cost with ecommerce unit economics. It estimates clicks from budget and CPC, orders from conversion rate, and contribution from average order value and margin. Unlike a basic ROAS calculator, it shows whether the modeled contribution covers ad spend.
Use the break-even ROAS, maximum CPA, and maximum CPC as planning limits—not automatic bidding instructions. Refunds, attribution, repeat purchases, discounts, and channel mix still need account-specific review.
Ad profit and break-even ROAS formulas
Calculation
Net contribution = clicks × conversion rate × contribution per order − ad spend
- Clicks equal ad budget divided by cost per click.
- Contribution per order equals average order value multiplied by gross margin, minus other variable cost per order.
- Break-even ROAS equals one divided by contribution margin.
- Maximum CPA equals contribution per order; maximum CPC equals that contribution multiplied by site conversion rate.
How to use the free tool
- 1
Start with one scenario
Use one date range, currency, and acquisition model. Do not mix historical CPC with a different season’s conversion rate.
- 2
Enter contribution economics
Use gross margin and per-order costs instead of assuming every dollar of revenue is available to pay for advertising.
- 3
Read the limits together
ROAS, maximum CPA, and maximum CPC are three views of the same modeled break-even boundary.
- 4
Stress-test the levers
Change CPC, conversion rate, or margin one at a time to see which assumption has the largest effect on profit.
How to interpret the profit projection
ROAS above break-even
The modeled contribution covers ad spend. Confirm refunds, attribution, and overhead before calling the campaign profitable.
ROAS below break-even
Lower CPC, improve conversion rate, raise contribution per order, or reduce spend. A revenue-only target will not repair thin margin.
Maximum CPA
This is the contribution available to acquire one modeled order. Use a lower operational target when you need room for overhead and uncertainty.
Maximum CPC
This combines contribution per order with conversion rate. A landing-page change can move the CPC limit even if auction cost does not change.
What the result does not prove
- The calculator does not infer attribution, refunds, cancellations, taxes, or fixed overhead.
- A first-order model can understate value when repeat purchases are material and overstate value when retention assumptions are weak.
- Projected clicks and orders are averages; small campaigns can vary substantially from the expected value.
When you need account-specific evidence, copy the task from the result panel. Install BizSidekick without making a payment, connect only the accounts required for the task, and ask it to verify the browser result before preparing supported changes for review.
Definitions and platform references
Frequently asked questions
How do you calculate profit from ads?
Estimate orders from clicks and conversion rate, multiply orders by contribution per order, then subtract ad spend. Contribution per order should reflect gross profit and any additional per-order costs included in the model.
What is break-even ROAS?
Break-even ROAS is the revenue return required for contribution profit to cover ad spend. In a simple model, divide one by contribution margin. A 50% contribution margin produces a 2.00× break-even ROAS.
How does the calculator find maximum CPA?
Maximum CPA equals the contribution available from one acquired order before advertising. Paying more than that amount to acquire the order would make the modeled first-order contribution negative.
Does a high ROAS always mean an ad is profitable?
No. ROAS measures attributed revenue divided by ad spend. Product margin, discounts, refunds, fulfillment, payment costs, agency costs, and attribution differences can change actual profit.
Is the BizSidekick Plugin free?
You can install the BizSidekick Plugin without making a payment. Product usage and subscription terms are separate from installation and are shown before you start a paid subscription.
