Muhammad Haris
Full-Stack Developer & Founder of Web Designs Den
Muhammad Haris is the founder and developer of Web Designs Den, a free tools platform built to help people make faster, clearer decisions around health, finance, and productivity using straightforward, science-backed calculators.
He designs and builds every calculator on this site personally — from the underlying formulas (BMR/TDEE equations, U.S. Navy body fat method, debt snowball/avalanche math, compound interest projections) to the interface itself. Every tool is built to run entirely in the browser, so no personal data is ever sent to or stored on a server.
Web Designs Den currently hosts 14+ free tools across health, finance, productivity, and nutrition, each paired with a detailed guide explaining the reasoning behind the numbers.
Approach to Health & Finance Content
Calculators involving health metrics (body fat, calorie deficit, sleep cycles) and financial decisions (debt payoff, savings goals) are built using established, publicly documented formulas (e.g., U.S. Navy circumference method, Mifflin-St Jeor BMR equation). Sources are cited in each tool's companion guide. This site does not provide medical or financial advice — tools are for informational and planning purposes only.