Methodology
How We Calculate
The intersection of mathematical precision and clinical research.
Source Identification
Every tool starts with a search for a validated, peer-reviewed study, medical textbook, or official health body recommendation (e.g., WHO, CDC).
Formula Translation
The mathematical model is translated into clean, efficient code without altering the underlying coefficients or logical thresholds.
Verification & Benchmarking
We verify the tool's outputs against clinical benchmarks and manual calculations to ensure a 0.01% margin of error.
Annual Recalibration
Calculators are flagged for review every 12 months, or immediately upon the release of new clinical guidelines from major health authorities.
Accuracy over engagement
Many digital health tools prioritize user engagement over clinical accuracy. Formulas are often simplified to reduce friction, and some use proprietary algorithms to recommend supplements.
ShapeUpAmerica rejects this approach. For a patient tracking a specific health metric, a simplified formula is inaccurate and potentially misleading.
Standard measurement units
We support both Imperial and Metric systems. However, our underlying calculations are performed using the SI units (System International) specified in the original clinical studies to prevent rounding errors.
Verified coefficients
Whether it is the Harris-Benedict revised equations or Karvonen heart rate formulas, we maintain the exact coefficients specified by the researchers. We cite these sources on every tool page so you can verify our logic.
Independent Sourcing
We are proud to provide a service that is free from commercial bias. Our work is supported solely by non-intrusive advertising, ensuring our results are objective.