About LogiCalc

Our Mission

LogiCalc's mission is to make evidence-based health information accessible to everyone, completely free. We believe that understanding your body — your BMI, your calorie needs, your daily protein targets — should not require a gym membership, a dietitian visit, or a subscription. Every calculator on this site is built on peer-reviewed scientific formulas, cited by source, and updated to reflect current nutritional guidelines.

Our Vision

We are building the most comprehensive, fastest, and most trustworthy health calculator platform on the internet. Our vision is a world where every person, regardless of income, location, or background, can access the same quality of personalised health data that was once only available inside a clinic.

What Makes Us Different

• Formulas sourced from peer-reviewed journals (WHO, NIH, CDC, NASM, ISSN)
• Every calculator page explains the science behind the number
• No registration. No data stored. Your inputs never leave your device.
• Metric and imperial support on every tool
• Mobile-optimised — most calculators are used on phones
• No ads cluttering the calculator interface — clean, fast, distraction-free

The Formulas We Use

We only use validated, widely-cited formulas from peer-reviewed sources. Here's a summary:

Medical Disclaimer

All results are estimates. LogiCalc calculators are informational tools — not medical advice. Results are based on population averages and may not reflect individual circumstances. Factors such as genetics, medications, underlying health conditions, and body composition can significantly affect individual metabolic rates and nutritional needs.

Always consult a qualified healthcare professional — including a doctor, registered dietitian, or certified fitness professional — before making decisions about your health, diet, or exercise programme.

Our Commitment to Scientific Accuracy

Every formula used on LogiCalc is selected based on its validation against direct or indirect calorimetry — the gold standard for measuring actual metabolic rate. We prefer equations validated in systematic reviews over those tested in smaller, less representative populations. When multiple validated formulas exist for the same calculation (as with BMR), we present all options and default to the most broadly validated one (Mifflin-St Jeor for BMR). We cite our sources on every calculator page so you can independently verify the science behind your results.

We also update our formulas when clinical guidelines are revised. Our protein calculator, for example, now reflects the 2017 ISSN position stand — the most recent and comprehensive meta-analysis on dietary protein and exercise — rather than older, more conservative RDA figures that were designed to prevent deficiency rather than optimise performance.

Who Uses LogiCalc?

LogiCalc is used by a wide and diverse audience:

• Fitness beginners who are calculating their calorie needs or checking their BMI for the first time and want a tool that explains what the numbers actually mean.
• Recreational athletes who train 3–5 days per week and want to dial in their nutrition — protein targets, carb intake, daily calorie needs — without hiring a personal coach.
• Healthcare students (nursing, dietetics, exercise physiology) who use LogiCalc to practice applying clinical formulas and verify their manual calculations.
• Parentswho want to understand their child's BMI classification, ideal weight ranges, or daily nutritional needs based on age and activity level.
• People managing chronic conditions such as type 2 diabetes or hypertension, who work with their doctors and dietitians but want an easy way to track macros and calories between appointments.

Whatever brings you to LogiCalc, every tool is designed to give you a clear, science-backed number — and the context to understand what it means for your specific situation.

Our Roadmap

LogiCalc is actively growing. Our current calculator library covers fitness and nutrition — BMI, BMR, TDEE, protein, carbohydrates, fat intake, body fat percentage, one-rep max, sleep cycles, water intake, and more.

In the coming months, we are planning to add:

• Advanced fitness calculators — VO2 max estimator, heart rate zone calculator, running pace calculator
• Clinical health tools — waist-to-height ratio, cardiovascular risk estimator, vitamin D intake calculator
• Science calculators — unit conversion tools, chemistry and physics calculators for students
• Finance calculators — compound interest, loan repayment, savings growth estimators

All new tools will follow the same standard: evidence-based formulas, clear explanations, no account required, and complete privacy. If there is a specific calculator you would find valuable, use our Contact page to suggest it.