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Project a Subscriber Count From Net Monthly Adds and Churn

Separate new subscriptions from expected losses before extending a straight-line forecast.

Decision result

Inputs modeled

4

10% more first input

Model status

Editable estimate

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How the calculation works

Business inputs4 editable valuesExplicit modelNo hidden averageDecision result15,880.0Change one assumption at a time and compare the result with source-system data.

How to Use This Tool

Separate new subscriptions from expected losses before extending a straight-line forecast. Calculate a YouTube subscriber projection from current subscribers, monthly additions, months and monthly loss rate.

The failure Subscriber Projection is designed to catch

Gross additions overstate growth when regular unsubscribes or account removals are ignored, especially across a long projection. The boundary is the job stated in Project a Subscriber Count From Net Monthly Adds and Churn; Subscriber Projection is not intended to score or transform a different workflow.

Recorded inputsNamed operationChecked output
The executable example for Subscriber Projection expects out: 15,880.0; changing an input must produce a correspondingly reviewable result.

The Subscriber Projection input contract

The fields used for this specific operation are Current subscribers, New subscribers per month, Projection months, Monthly loss rate %. Keep the source values beside the Subscriber Projection result, because replacing the original would remove the evidence needed to reproduce or reverse the operation.

  • For Subscriber Projection, Current subscribers starts at 10000 in the worked case; replace that example with the matching source value.
  • For Subscriber Projection, New subscribers per month starts at 500 in the worked case; replace that example with the matching source value.
  • For Subscriber Projection, Projection months starts at 12 in the worked case; replace that example with the matching source value.
  • For Subscriber Projection, Monthly loss rate % starts at 2 in the worked case; replace that example with the matching source value.

Worked result for Subscriber Projection

The executable case called Default decision scenario expects out: 15,880.0. Verify that observation before entering real material, and then change one Subscriber Projection field at a time so an unexpected direction or formatting change can be traced to a specific input.

Reading the Subscriber Projection output

It combines current subscribers, new subscribers per month, projection months and monthly loss rate % into one decision result using the formula explained on the page. Apply that answer only when Current subscribers, New subscribers per month, Projection months, Monthly loss rate % describe the same scope and format as the worked operation. If the source uses different units, quoting, nesting, timing or account rules, a plausible-looking Subscriber Projection output is not sufficient validation.

Assumptions attached to Subscriber Projection

  • Subscriber Projection assumes that all inputs describe the same unit or reporting period unless the field explicitly says otherwise.
  • Subscriber Projection assumes that the model includes only the four visible inputs and does not infer hidden platform charges.

If one of these Subscriber Projection assumptions is false, keep the result as a diagnostic rather than production or decision data, and choose an implementation that explicitly supports the missing rule.

Evidence maintained for Subscriber Projection

The recorded reference is YouTube Help — creator resources. Reopen that source when the definition, format, fee or policy behind Subscriber Projection changes; private configuration and downstream acceptance still have to be checked in the user's own system.

Where Subscriber Projection runs

The named operation executes in browser JavaScript without an ecech calculation API. For Subscriber Projection, local execution reduces transmission but does not control browser extensions, device security or the destination where the result is pasted, so sensitive inputs still require the user's normal handling rules.

Sources & assumptions

Tool Spec v2 · verified 2026-08-19. Platform rules and fees can change; the editable inputs remain authoritative for your account.

Official references

Model assumptions

  • All inputs describe the same unit or reporting period unless the field explicitly says otherwise.
  • The model includes only the four visible inputs and does not infer hidden platform charges.
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Frequently Asked Questions

What specific job does Subscriber Projection perform?
The Subscriber Projection scope is: Calculate a YouTube subscriber projection from current subscribers, monthly additions, months and monthly loss rate. Anything beyond that stated operation needs a separate model or validator.
Which inputs determine the Subscriber Projection result?
For Subscriber Projection, the visible inputs are Current subscribers, New subscribers per month, Projection months, Monthly loss rate %; their units, format and reporting scope must match the case being tested.
What result does the Subscriber Projection example verify?
The Subscriber Projection executable case expects out: 15,880.0, which is a regression check for this operation rather than an industry benchmark.
What problem should Subscriber Projection prevent?
Gross additions overstate growth when regular unsubscribes or account removals are ignored, especially across a long projection.
Which source should I check for Subscriber Projection?
The Subscriber Projection reference is YouTube Help — creator resources; reopen it when the underlying format, policy or definition changes.
Does Subscriber Projection send input to a server?
No ecech. calculation API receives the values used by Subscriber Projection; browser extensions, the local device and any destination where you paste the result remain separate risks.

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