Derek Todd

Derek Todd writes about the nuts and bolts of how BMI is calculated, broken down for people who just want a straight answer. He focuses on making the math approachable, walking through the formula step by step instead of tossing numbers at the reader. His articles tend to favor plain language and short examples over jargon.

He digs into the kind of questions that pop up when someone's result doesn't seem to match their expectations. That includes edge cases like very tall or short individuals, the differences between metric and imperial inputs, and why rounding can shift a score by a tenth of a point. He also covers common entry errors, like mixing pounds with the metric formula or forgetting to square the height value.

He's clear that nothing on the site replaces talking to an actual doctor or clinician about your specific situation. His goal is to help people understand what the number on the screen means and where it comes from, full stop. He flags when BMI is especially limited as a indicator and encourages readers to bring questions to a healthcare professional.