Health & Fitness
3 toolsBody Fat Calculator
Calculate your body fat percentage using the U.S. Navy method and BMI. Assess your fitness level and understand your body composition better by entering your measurements.
Calorie Calculator
Estimate your daily calorie needs based on your Basal Metabolic Rate (BMR) and activity level. Plan your nutrition with accurate, personalized numbers.
BMI Calculator
Calculate your Body Mass Index, BMI Prime, and Ponderal Index. Assess whether your weight is in a healthy range based on your height.
Math & Education
3 toolsScientific Calculator
Full-featured scientific calculator with trigonometric, logarithmic, and statistical functions. Handles complex math right in your browser.
GPA Calculator
Calculate your GPA for single or multiple semesters. Supports letter grades, percentages, and direct point values. Include prior GPA for cumulative average.
Grade Calculator
Calculate your current course grade, track weighted assignments, and plan what score you need on your final exam to reach your target.
Other Tools
5 toolsAge Calculator
Determine your precise age based on your date of birth and a target date. Get results in years, months, days, weeks, hours, minutes, and seconds.
Random Number Generator
Generate random numbers within a specified range. Use the basic generator for a quick result, or the comprehensive one for lists with specific precision.
Random Password Generator
Generate strong, secure passwords instantly. Customize length, character types, and exclusions. Runs entirely in your browser — no data sent to any server.
Picker Wheel
A digital spinner to randomly select an option from a list. Great for educational use, business promotions, personal decisions, and fun games.
Free Image Converter EXTERNAL
Convert images to PNG for lossless quality preservation, or to JPG for smaller file sizes, faster web loading, and easier sharing.
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Why MD-Calc Tools?
Privacy First
Every calculation runs 100% in your browser. We don't collect, store, or transmit any of your data. No cookies tracking your results, no analytics on your inputs. What you calculate stays with you.
Instant & Reliable
No loading screens, no server round-trips, no rate limits. Every tool responds instantly because there's no backend to wait on. The math is precise and uses well-established formulas.
Works Everywhere
Fully responsive design that works on phones, tablets, laptops, and desktops. No app to install — just open your browser and go. Works offline once the page is loaded.
Clean & Focused
No cluttered interfaces, no pop-ups, no paywalls. Each tool is designed to do one thing well. Clear inputs, clear results, no guessing what to click next.