Thumbnail Test Click Lift
Use this thumbnail test click lift tool when you have measured values for new ctr, old ctr. It applies a transparent mathematical relationship to those values to return an answer in %. Unlike a prediction or recommendation, this is a calculation from your inputs. CTR lifts do not prove causal improvement without controlled tests. Enter a different scenario to see how this particular quantity changes; check the assumptions before using it in a project.
How to use this calculator
- Use exact measurements and consistent units for new ctr, old ctr.
- Enter each quantity; blank, nonnumeric and out-of-range inputs are not accepted.
- Compare the reported % quantity against your own data and the limitations below.
Formula for Thumbnail Test Click Lift
% = 100*(new_ctr-old_ctr)/old_ctr. Inputs are expressed in the units shown by the labels.
- This uses a direct creator relationship and does not retrieve remote data, forecasts or individual account information.
- CTR lifts do not prove causal improvement without controlled tests.
Worked examples
Worked example — Thumbnail Test Click Lift
Enter New ctr = 5.8, Old ctr = 4.9.
Apply 100*(new_ctr-old_ctr)/old_ctr.
Calculated value: approximately 18.36735 %.
Understanding the result
The example produces about 18.36735 %; this is a mathematical output for the example inputs, not an observed result for your project.
CTR lifts do not prove causal improvement without controlled tests.
Important notes
CTR lifts do not prove causal improvement without controlled tests.
Use values from the same measurement period or physical system. The result is in % and is not a guarantee of capacity, safety, ranking or revenue.
Frequently asked questions
What does Thumbnail Test Click Lift calculate?
It converts new ctr, old ctr into a quantity measured in % using the stated formula.
Which assumption matters most?
CTR lifts do not prove causal improvement without controlled tests.
How can I check this output?
Recalculate the worked example from the input quantities, confirm units and compare with direct measurements where available. This calculator does not fetch live data.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.