Net promoter score · Local Calculator

Net Promoter Score Calculator

Net Promoter Score Calculator calculates net promoter score from the supplied parameters, with live validation, a readable formula note, and local browser processing.

No uploadsMobile friendlyTheme aware

How Net Promoter Score Calculator works

Net Promoter Score Calculator calculates net promoter score from the supplied parameters, with live validation, a readable formula note, and local browser processing.

Calculation model

Subtracts the detractor share from the promoter share.

Recommended workflow

  1. Confirm every field uses the displayed unit.
  2. Adjust the example values and review the live result and input summary.
  3. Copy the result, then document assumptions and verify requirements before use.

Use cases

Use it for planning, comparison, documentation, and quick checks involving promoters, detractors, total valid responses.

Limits and verification

The calculation follows this stated model: Subtracts the detractor share from the promoter share. Real projects may require additional coefficients, tolerances, taxes, codes, or professional review.

Frequently Asked Questions

Does Net Promoter Score Calculator upload my values?
No. The calculation runs in the current browser tab and ToolHub does not receive or store the values you enter.
What does Net Promoter Score Calculator calculate?
Net promoter score from promoters, detractors, total valid responses.
Can I use the result in a real project?
The calculation follows this stated model: Subtracts the detractor share from the promoter share. Real projects may require additional coefficients, tolerances, taxes, codes, or professional review.
Does it work on phones?
Yes. The input and result workspace adapts to mobile, tablet, and desktop screens.
Why can my result differ from another source?
Differences usually come from units, rounding, assumptions, local rules, or coefficients used by the other source.

Net Promoter Score Calculator: inputs, output, and reproducible example

Net Promoter Score Calculator calculates net promoter score from the supplied parameters, with live validation, a readable formula note, and local browser processing.

What this page actually processes

FieldControlDefault exampleValidation role
PromotersNumber420Promoters is read by the browser as a number value before the tool runs.
DetractorsNumber80Detractors is read by the browser as a number value before the tool runs.
Total valid responsesNumber600Total valid responses is read by the browser as a number value before the tool runs.

Reproduce the built-in example

Start with Promoters = 420; Detractors = 80; Total valid responses = 600, then run Net Promoter Score Calculator. Change one input at a time so the effect on the result remains traceable.

After validating promoters, detractors, total valid responses, the page displays its result in the output workspace and enables the relevant copy or download action.

Formula and variable relationship

Subtracts the detractor share from the promoter share. The implemented expression is “(promoters-detractors)/responses*100”. The page validates promoters, detractors, total valid responses before formatting the result in the displayed dimension.

Sensitivity check: change only promoters from 420 people to 462 people. With every other input unchanged, net promoter score moves from 56.7 to 63.7 . This provides a reproducible input-to-result check.

When to use it and how to interpret the result

Net Promoter Score Calculator is intended for workflows involving Promoters, Detractors, Total valid responses.

Limits and checks before use

Subtracts the detractor share from the promoter share.

Page verification record

Controls inspected3 documented inputsResult pathValidate → process → review → copy/downloadLast content review2026-09-02