75.00% is the example result. Read it using the units and relationship stated below.
Funnel Drop Off uses starting stage volume, ending stage volume.
Separating campaign efficiency from business profit
For funnel drop off, the relationship is Result = (([Starting stage volume] − [Ending stage volume]) ÷ ([Starting stage volume])) × 100. The amount depends on the supplied starting stage volume, ending stage volume, rather than a live market price or a value imported from another record. Campaign ratios depend on the event being counted. A click, a submitted form, a qualified opportunity and a paying customer are separate outcomes. Combine spend and events from the same campaign window before comparing acquisition costs.
What the model includes
Result = (([Starting stage volume] − [Ending stage volume]) ÷ ([Starting stage volume])) × 100 Attribution can credit revenue to several channels. Use one attribution definition for the comparison and keep refunds or cancelled orders consistent. An efficient advertising ratio can coexist with weak contribution after fulfilment. Read the result beside lead quality and the sales outcome. A lower cost is useful only when the counted event still represents the objective the campaign was built to achieve.
Example with the supplied inputs
Starting stage volume: 1000; Ending stage volume: 250. Result: 75.00%. The values are illustrative.
Compare one changed input
Starting stage volume changes from 1000 to 1100. The result becomes 77.27%. All other inputs remain fixed.
Calculation rule
Result = (([Starting stage volume] − [Ending stage volume]) ÷ ([Starting stage volume])) × 100
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Starting stage volume | 1000 | Measure starting stage volume in the displayed unit. Convert the source measurement before entry if it uses another system; a changed label does not perform a unit conversion. |
| Ending stage volume | 250 | Measure ending stage volume in the displayed unit. Convert the source measurement before entry if it uses another system; a changed label does not perform a unit conversion. |
Output: 75.00% is the example result. Read it using the units and relationship stated below. Use the formula to distinguish a cash amount, count, percentage or ratio.
How to use the page
Collect the inputs
Gather Starting stage volume, Ending stage volume. Use one period and the units shown in the form.
Run the calculation
Enter the values and select the action. The calculation rule above explains how the inputs produce the result.
Compare a scenario
Change Starting stage volume on its own, keeping the other inputs fixed. Read both results before changing another assumption.
Worked example
With the example inputs listed above, the result is 75.00%.
Change Starting stage volume from 1000 to 1100 while keeping every other value fixed. The result becomes 77.27%. This comparison isolates that input; it does not forecast how other variables will respond.
Check the stated formula, units and limits before using the result in a decision.
Keep the displayed formula, input units and model scope with the result. Corrections or questions can be sent through the request section on this page.
Content updated: October 11, 2026