Amazon PPC Bid Calculator
Your maximum Amazon PPC bid is price × conversion rate × target ACOS. Enter your numbers below to see your break-even bid, the bid that hits your target ACOS, and what a month of clicks will cost.
How the calculator works
Every Amazon PPC bid decision comes back to one question: how much can you pay for a click and still make the profit you want? Three numbers answer it.
- Break-even ACOS = profit before ad costs ÷ selling price. This is the most you can spend on ads, as a share of the sale, before an ad-driven order loses money.
- Break-even bid = price × conversion rate × break-even ACOS (which simplifies to profit × conversion rate).
- Target bid = price × conversion rate × target ACOS. Use this as your starting bid for keywords where you want to hit your target.
The monthly estimate multiplies your expected daily clicks by the target bid over 30 days, and uses your conversion rate to estimate the orders and ad sales those clicks produce.
Worked example
A product sells for $29.99 and makes $9.00 profit before advertising. Its keywords convert at 12% and the seller wants a 20% ACOS.
- Break-even ACOS = 9.00 ÷ 29.99 = 30%
- Break-even bid = 29.99 × 12% × 30% = $1.08
- Target bid = 29.99 × 12% × 20% = $0.72
- At 50 clicks a day, a month of ads costs about $1,079.64 and should bring roughly 180 orders.
Using your results
- Launching a product? Bidding between your target and break-even bid can make sense while you build sales history and rank, as long as you've budgeted for it.
- Optimising a mature campaign? Bring keywords whose cost per click sits above your target bid back down towards it, and raise bids on keywords converting better than average.
- Conversion rate is the lever. Doubling conversion rate doubles the bid you can afford, which is why listing optimisation and PPC go together.
Frequently asked questions
How do I calculate my maximum CPC bid on Amazon?
Multiply your product price by your conversion rate and your target ACOS. For a $29.99 product converting at 12% with a 20% target ACOS, the maximum bid is 29.99 × 0.12 × 0.20 = $0.72. Bidding above this means each order costs more in ads than your target allows.
What is a break-even bid?
The break-even bid is the highest cost per click at which an ad-driven sale still makes zero profit. It equals your profit per sale before ad costs multiplied by your conversion rate. For $9.00 profit and a 12% conversion rate, that is $1.08 per click.
Where do I find my conversion rate?
In Amazon Ads campaign manager, divide orders by clicks for the keyword or campaign. For a new product with no data, use the conversion rate of a comparable product you already sell, or start with a conservative estimate and update it after two to four weeks of data.
What does the Amazon PPC cost estimate show?
If you enter the clicks per day you expect, the calculator multiplies them by your target bid over 30 days to estimate monthly ad spend. It also shows the orders and ad sales those clicks should produce at your conversion rate. Real cost per click is often below your bid, so treat the spend estimate as a ceiling.