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Health & FitnessGenerated accuracy model review: 2026-05-06
Points Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- This calculator uses an approximation formula similar to popular 'Smart' point systems: **Points ≈ (Calories * 0.03) + (Sat Fat * 0.275) + (Sugar * 0.12) - (Protein * 0.098)** Note: Protein reduces the point count!
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Calories: 150
- Saturated Fat (g): 2
- Sugar (g): 10
- Protein (g): 5
Expected outputs
- Estimated Points: 6
Known limitations
- This is an unofficial estimation tool. It is not affiliated with Weight Watchers International.
Assumptions
- The score is based on a public approximation rather than an official proprietary formula.
- Inputs are assumed to come from one serving of a nutrition label.
- Some branded plans or zero-point food rules may not match the estimate exactly.
Unit handling
- Calories accepts numeric values.
- Saturated Fat (g) accepts numeric values.
- Sugar (g) accepts numeric values.
- Protein (g) accepts numeric values.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current weight-watchers-points-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Points Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.