CPO Calculator
Cost per order and how it compares with margin.
Enter your values
Enter the marketing spend in $.
Enter the orders generated you are working with.
Enter the average order value in $.
Enter the contribution margin in %.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Cost per order
- $50.00
- Contribution per order
- $42.75
- Profit per order
- -$7.25
- Status
- Unprofitable — reduce CPO or raise AOV
- Marketing cost ratio
- 52.6%
- Max sustainable CPO
- $42.75
Quick answer
Cost per order (CPO) is total marketing spend divided by the number of orders it produced — profitable when it stays below your contribution margin per order.
CPO = spend ÷ orders
At a glance
| What it does | Cost per order and how it compares with margin. |
|---|---|
| Category | Business |
| Inputs needed | Marketing spend, Orders generated, Average order value, Contribution margin |
| Main output | Cost per order |
| Formula | CPO = spend ÷ orders |
| Cost | Free — no sign-up, no download |
How to use the CPO Calculator
- 1Enter total marketing spend for the period.
- 2Enter the orders that spend generated.
- 3Add your average order value and contribution margin.
Inputs explained
- Marketing spend($)
- Enter the marketing spend in $.
- Orders generated
- Enter the orders generated you are working with.
- Average order value($)
- Enter the average order value in $.
- Contribution margin(%)
- Enter the contribution margin in %.
Worked example
Using the values the calculator loads with:
Inputs
- Marketing spend8000 $
- Orders generated160
- Average order value95 $
- Contribution margin45 %
Results
- Cost per order$50.00
- Contribution per order$42.75
- Profit per order-$7.25
- StatusUnprofitable — reduce CPO or raise AOV
- Marketing cost ratio52.6%
- Max sustainable CPO$42.75
Frequently asked questions
What's the difference between CPO and CAC?
CPO counts every order including repeats; CAC counts only spend divided by new customers acquired.
What is a healthy CPO?
Below your contribution margin per order — most e-commerce brands target a CPO under 25–30% of AOV.
What do I need to enter into the CPO Calculator?
Just 4 values: marketing spend, orders generated, average order value, contribution margin. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the CPO Calculator work out the answer?
Cost per order (CPO) is total marketing spend divided by the number of orders it produced — profitable when it stays below your contribution margin per order. It applies the formula CPO = spend ÷ orders and shows the working so you can check each step by hand.
Is the CPO Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.