Draper Digital

Plan / Free PPC tool

Conversion rate uplift calculator

See what a better conversion rate could mean at the same traffic and spend. Compare your current rate with a realistic scenario before prioritising landing page work.

Your inputs

Example values

Change the example figures to use your own. Values stay in this browser tab.

Use the same reporting period as ad spend.

Held constant in both scenarios.

Conversions per 100 paid clicks.

You can also test a lower rate.

Use zero if you only want to compare conversion counts and CPA.

Your results

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Free to use. No signup. Inputs are processed in your browser and are not sent to Draper Digital.

Understand the numbers

How to use this calculator

Make the comparison fair

Both scenarios use the same clicks, spend and value per conversion. In practice, a change in traffic quality, lead quality or order value may change the outcome. Use this to size a possible opportunity, then test it.

Separate uplift from proof

This calculator models an assumed rate. It does not test statistical significance or prove that a page change caused an improvement. Fractional conversions represent an expected average, not part of a real customer.

A worked example

With 2,000 clicks and £3,000 spend, moving from 3% to 4% gives 80 expected conversions instead of 60. That is 20 more conversions and CPA of £37.50 instead of £50. The increase is 1 percentage point, or 33.33% relative uplift. At £100 per conversion, expected revenue increases by £2,000.

A little more context

Common questions

Is 3% to 4% a 1% increase?

It is an increase of 1 percentage point and about 33.33% relative to the original rate. The calculator shows both so you can describe the change accurately.

Can I compare a worse scenario?

Yes. Enter a lower scenario rate to see the loss of conversions and revenue and the effect on CPA.

Why can CPA or relative uplift be unavailable?

CPA is undefined when conversions are zero. Relative uplift is undefined when the starting rate is zero. Neither is displayed as a misleading zero.

Keep the work moving

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