How Kalcule builds its calculators
Written by The Kalcule Team · Last updated March 9, 2023
Kalcule publishes free calculators and explainers. We cite the equation behind each tool. We do not diagnose, treat, or employ a medical review board.
At KALCULE, we believe that accurate information leads to better decisions. Our mission is to provide free, accessible, and easy-to-use calculators that help you navigate various aspects of life - from fitness and health to financial planning and time management.
We are not nutritionists, clinicians, or financial advisors presenting as a practice. What we do is implement public formulas, link the source, and describe the limits on the same page. If a credentialed reviewer is added later, that name will appear in the byline.
The library covers body metrics, nutrition targets, pregnancy and ovulation dating, BAC estimates, calendar math and inflation. Open a calculator when you want the number; use the supporting articles when you want the assumptions.
Kalcule is built by a small independent team. We are not a clinic and we do not employ a medical review board. What we do instead is publish the exact formula behind each tool, link to the primary literature or public-health body that defined it, and keep a visible last-updated date on every page. If a credentialed reviewer is added later, that name will appear in the byline.
We commit to naming the formula, linking a checkable source, and correcting errors when we find them. We do not claim to review every page against the latest clinical guideline in real time.
New tools will follow the same rule: a cited method, visible limits, and a link back from any explainer. We will not add a calculator we cannot source.
Thank You for Choosing KALCULE
We appreciate your trust in our calculators. If you have any questions, suggestions, or feedback, please don't hesitate to contact us. We're here to help!
We prefer equations that are widely used in clinical or public-health practice and that have a citable primary source. BMI uses the WHO categories. Resting energy uses Mifflin-St Jeor (1990). Blood alcohol uses the Widmark equation. Due dates use Naegele’s rule. Body-fat percentage uses the U.S. Navy circumference method. Each calculator page links out to that source. Results are estimates with known limitations, which we describe in the FAQ on the same page.