Free tools
Amazon PPC Bid Calculator
Find the highest CPC bid that still hits your target ACOS. Calculated in your browser.
Max CPC bid $0.75
Bidding above $0.75 on this keyword pushes you past your 30% target ACOS.
Frequently asked questions
How do I calculate a maximum CPC bid?
Multiply your sale price by your conversion rate and your target ACOS. The result is the most you can pay per click and still hit your target advertising cost of sale.
Why does conversion rate matter for bids?
Only a fraction of clicks turn into orders, so your safe cost per click is your revenue per sale scaled by how often a click converts and by the share of that revenue you are willing to spend on ads.
Is this calculator free?
Yes. It runs entirely in your browser, needs no account, and nothing you type leaves your device.