Free form & survey tools

Utilities for form builders, marketers, and customer experience teams. The calculators run in your browser. No signup required.

NPS Calculator

Calculate Net Promoter Score from promoter, passive, and detractor counts, or from raw 0-10 scores.

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CSAT Calculator

Calculate customer satisfaction from satisfied responses, or from a 1-5 or 1-3 rating breakdown.

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Survey Response Rate Calculator

Turn invitations and responses into a response rate, and add a completion rate when you track starts.

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Quiz Score Calculator

Turn points earned and points possible into a percentage, with an optional US letter grade.

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Build the form in FormFlux

Start from a free template, then publish a survey you can share. Core forms are free forever.