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Target ROAS ↔ Target CPA Converter

Convert between Target ROAS and Target CPA, they're the same constraint expressed differently.

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Average order value

Target ROASe.g. 4 = $4 revenue per $1 spent

Equivalent Target CPA

$21.25

At AOV $85.00 this matches your input of 4x

Bidding-strategy tip

Some campaign types only support one or the other (Standard Shopping → tROAS; older Search → tCPA). Knowing the equivalent lets you keep efficiency targets consistent regardless of which bid strategy a campaign uses.

About this tool

tROAS = revenue / spend. tCPA = spend / conversion. They're equivalent: tCPA = AOV / tROAS. This calculator converts between the two so you can set whichever bid strategy you're using to match the other.

They're the same constraint

Target ROAS = revenue / spend. Target CPA = spend / conversion. With a known AOV, they're algebraically equivalent: tCPA = AOV ÷ tROAS. Some bidding strategies only support one (Standard Shopping → tROAS only; older Search campaigns → tCPA only), so knowing the equivalent lets you keep efficiency targets consistent regardless of which lever a campaign exposes.

When tROAS and tCPA diverge in practice

AOV isn't constant — promo periods, gift card redemptions and product mix shifts all move it. If you set tCPA off a stale AOV, you'll over- or under-bid. Refresh both numbers monthly using actual trailing 30-day data, and rerun this converter when you do.