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Simon Stephen

Simon Stephen Health & Fitness Expert

34
Tools
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Posts

Simon Stephen is a dedicated Health & Fitness Expert who supports our calculators by providing practical, science-based insights that help users make smarter health and fitness decisions. With a strong background in exercise science, he bridges the gap between fitness knowledge and everyday healthy habits.

Expertise & Contribution

Fitness & Wellness Guidance:

Simon designs simple, effective strategies to improve strength, endurance, and overall well-being, helping users understand their fitness levels and goals.

Calculator Accuracy & Insights:

He ensures our calculators provide accurate, reliable, and easy-to-understand information about BMI, calories burned, body composition, and other wellness metrics.

Healthy Lifestyle Support:

His guidance empowers users to make informed choices, track progress, and adopt routines that align with their personal health objectives.

User-Friendly Fitness Education:

Simon believes health and fitness knowledge should be accessible to everyone, turning complex physiological information into clear, actionable advice.

Role on TheSmartCalculator

As a key member of our Health & Fitness team, Simon enhances the quality, usability, and credibility of our tools. His expertise helps users confidently analyze their health metrics and achieve their fitness goals.

Calculators

Precision tools built for accuracy

34 Active

Vancomycin Calculator

Calculate vancomycin dosing, AUC, trough levels for clinical use

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BMI Calculator

Calculate your Body Mass Index and understand your weight status

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Pregnancy Weight Gain Calculator

Calculate your recommended weight gain during pregnancy

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Calories Burned Calculator

Estimate the number of calories burned during physical activities.

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Due Date Calculator

Estimate your due date based on your last menstrual period or conception date.

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Pace Calculator

Calculate your running pace and speed

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One Rep Max Calculator

Estimate your one-rep max for strength training exercises.

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Army Body Fat Calculator

Calculate body fat percentage using the U.S. Army method.

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Target Heart Rate Calculator

Calculate your target heart rate zone for exercise.

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Protein Calculator

Calculate your daily protein needs based on activity level and goals

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Healthy Weight Calculator

Calculate your healthy weight range based on height and gender

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Fat Intake Calculator

Calculate your daily fat needs based on activity level and goals

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Carbohydrate Calculator

Calculate your daily carbohydrate needs based on activity level and goals

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Ovulation Calculator

Estimate your ovulation date and fertile window

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Lean Body Mass Calculator

Calculate your lean body mass based on weight and body fat percentage

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TDEE Calculator

Calculate your Total Daily Energy Expenditure (TDEE) based on activity level

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Conception Calculator

Estimate your conception date based on ovulation and intercourse dates.

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GFR Calculator

Estimate your Glomerular Filtration Rate (GFR) based on creatinine levels.

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Anorexic BMI Calculator

Calculate BMI for individuals with anorexia.

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Ideal Weight Calculator

Calculate your ideal body weight range based on height and gender

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Overweight Calculator

Calculate BMI for individuals with overweight.

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Body Type Calculator

Determine your body type based on measurements and characteristics.

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Period Calculator

Calculate your menstrual cycle and ovulation dates.

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BMR Calculator

Calculate your Basal Metabolic Rate (BMR) for calorie needs

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Weight Watchers Points Calculator

Calculate Weight Watchers points based on food items.

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Body Surface Area Calculator

Calculate your body surface area (BSA) using various methods.

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Calorie Calculator

Calculate daily calorie needs based on your lifestyle and goals

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Blood Alcohol Content (BAC) Calculator

Estimate your blood alcohol content (BAC) based on drinks consumed.

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Body Fat Calculator

Calculate body fat percentage using various methods

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Macro Calculator

Calculate macronutrient requirements for your goals

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Pregnancy Calculator

Estimate pregnancy schedule based on due date, last period, ultrasound, conception, or IVF transfer date.

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Pregnancy Conception Calculator

Estimate conception date and pregnancy milestones based on due date, last period, or ultrasound date.

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Rucking Calorie Calculator

Calculate calories burned during weighted walks (rucking) using the Pandolf equation

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Dental Implant Cost Calculator

Use our dental implant cost calculator to estimate per tooth, 6 teeth, 7 implants, or full mouth dental implant costs fast.

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Articles

Expert insights and guides

2 Published
ArticleFebruary 24, 2026

How Much Weight Should I Gain During Pregnancy Calculator

Read this insightful article to learn more about this topic.

Read Article
ArticleFebruary 25, 2026

How to Calculate GFR from Creatinine Complete Clinical Guide

Read this insightful article to learn more about this topic.

Read Article