Product Profit Calculator for Ad Spend
This free calculator helps you work out whether your product ads are really paying off. Simply enter your costs and revenue figures below to see your profit, Return on Ad Spend (ROAS) and break-even point. Use this to sense-check your ad performance and make better decisions about where to spend.
Where to find your numbers
Not sure which figures to use? Here’s where you can usually find them:
- Ad spend – Check the “cost” column in your Google Ads or Meta Ads manager for the same date range you’re analysing.
- Revenue – In GA4, look at “Purchases revenue” or your ecommerce report (make sure tracking is set up correctly). Some ad platforms also report attributed revenue.
- Cost of Goods Sold (COGS) – Usually from your accounts or supplier invoices. Take the unit buy-in cost × units sold.
- Transaction fees – Export reports from your payment provider (e.g. Stripe, PayPal, Klarna) to see fees deducted for the same orders.
- Shipping costs – Use courier invoices or fulfilment platform reports. Be sure to include only what you paid the carrier, not what the customer was charged.
- Returns/Refunds – Your order management system should show the total refunded value for the chosen period.
- Packaging – Pull from supplier invoices or estimate (average £/order × orders dispatched).
- Overheads allocation – Decide on a fair percentage of indirect costs (e.g. warehouse rent, staff time, software licences) and apply it to this activity.
Tip: keep your reporting periods consistent (e.g. last 30 days) and always use ex-VAT values so costs and revenue match.
