HEALTH & FITNESS JOURNAL
LogiCalc Blog
Evidence-based articles on nutrition, fitness, weight management, and how to use health calculators. Written for real people, backed by science.
FeaturedWhat Is a Healthy BMI and How Accurate Is It Really? | LogiCalc
Understanding what your BMI number actually means, when it is accurate, and when it misleads — with science-backed ranges and expert guidance.
OtherHow Many Business Days Between Dates? Working Days Guide | LogiCalc
A complete guide on calculating business days between dates, excluding weekends, and managing deadlines and project timelines.
OtherHow Many Days Between Two Dates? A Guide to Calendar Calculations | LogiCalc
Learn how to calculate the exact number of days between two calendar dates, understand inclusive vs. exclusive counting, and how leap years affect duration.
OtherHow Many Hours Between Two Times? Shift & Work Hours Guide | LogiCalc
Learn how to calculate the exact hours worked between two times, deduct break times, handle shifts that cross midnight, and convert to decimal hours.
OtherHow Old Am I in Days? The Math Behind Your Life in Days, Hours, & Weeks | LogiCalc
Calculate your exact age in days, weeks, and hours. Learn the exact calendar arithmetic of leap years and find your next birthday countdown.
OtherHow to Add and Subtract Time (Hours, Minutes, Seconds) | LogiCalc
A complete guide on performing time arithmetic, converting between base-60 time units and decimal hours, and solving common time calculations.
OtherHow to Calculate Time Duration Between Two Dates & Times | LogiCalc
A comprehensive guide on calculating the exact elapsed time between two distinct points in time, converting units, and managing calendar boundaries.
OtherHow to Calculate Weekly Work Hours and Daily Overtime | LogiCalc
A comprehensive guide on calculating weekly work hours, deducting unpaid lunch breaks, and applying daily or weekly overtime rules for payroll.
OtherWhat Day of the Week Was I Born? The Calendar Science Explained | LogiCalc
Discover how to find the day of the week you were born on, learn the history of calendar changes, and understand Zeller's congruence.
OtherWhat Time Is It in India From USA? Time Zone Differences Explained | LogiCalc
Understand the timezone offset differences between the USA and India (EST, PST, IST) and learn how to convert times easily across regions.
Calculator GuidesHow to Convert Hexadecimal to Decimal Manually — Full Guide | LogiCalc
How to convert hexadecimal to decimal manually step by step — a complete guide covering the positional notation method, worked examples, and hex to binary conversion.
Calculator GuidesHow to Convert Binary to Decimal Step by Step — With Examples | LogiCalc
How to convert binary to decimal step by step with examples — a complete guide covering positional notation, the repeated division method, and binary arithmetic explained simply.
Calculator GuidesHow to Calculate Percentage Difference Between Two Numbers | LogiCalc
How to calculate percentage difference between two numbers formula — the complete guide covering percentage difference vs. percentage change, worked examples, and when to use each.
Calculator GuidesHow to Add Fractions With Different Denominators — Step by Step | LogiCalc
How to add fractions with different denominators step by step — a complete guide covering LCD, simplification, and worked examples for every type of fraction.
FitnessBody Fat Percentage Ranges by Age — What Is Healthy for Men and Women? | LogiCalc
Healthy body fat percentage range for men and women by age — including the US Navy measurement method, ACE categories, and what your number actually means.
FitnessHow to Fix a Ruined Sleep Schedule in 2 Days — Science-Backed Methods | LogiCalc
How to fix a ruined sleep schedule in 2 days using evidence-based circadian reset techniques — sleep cycles, light exposure, and strategic timing.
NutritionHow Much Water Should You Drink While Taking Creatine? | LogiCalc
How much water should I drink while taking creatine — the research-backed answer explaining creatine's effect on water distribution and your personalised hydration target.
How Much Water Should I Drink While Taking Creatine?
Creatine increases intracellular water retention. Here's exactly how to adjust your hydration when supplementing — and why it matters for performance and safety.
NutritionThe Best Macro Split for Body Recomposition — Lose Fat and Build Muscle | LogiCalc
The best macro split to lose fat and build muscle at the same time requires precise protein targets, strategic carbohydrates, and a specific calorie approach.
NutritionHow Many Calories Should You Eat to Lose Weight Without Losing Muscle? | LogiCalc
How many calories should I eat to lose weight without losing muscle — the science-backed answer using TDEE, protein targets, and sustainable deficit strategies.
High Protein Macro Split for Skinny Fat Transformation
Skinny fat is one of the most misunderstood body types in fitness. Here's the exact macro split and protein strategy that drives real body recomposition — backed by science.
FitnessWhat Is Basal Metabolic Rate and How Do You Increase Your Metabolism? | LogiCalc
What is basal metabolic rate and how to increase metabolism naturally — the science behind BMR, what affects it, and evidence-based methods to boost it.
FitnessHow Many Calories Do You Burn Lifting Weights for an Hour? | LogiCalc
The science-backed answer to calorie burn during weight training — TDEE, metabolic rate, and how to calculate your exact daily energy needs.
How Many Calories Do I Burn Lifting Weights for an Hour?
Calorie burn during weight training depends on weight, intensity, and training style. Here's the research-backed breakdown — plus how to factor it into your TDEE.
Is BMI Accurate for Bodybuilders with High Muscle Mass?
BMI classifies many athletes as overweight despite low body fat. Here's why BMI is inaccurate for bodybuilders — and what to use instead.