The Pocket Calculator Blog
In-depth guides, tips, and insights on finance, health, mathematics, and everyday calculations.
Income Tax India 2026-27: New vs Old Regime, Slabs & Calculation Guide
Understand the new and old tax regimes side by side, with actual slab tables, deduction comparisons, and worked examples to find which regime saves you more.
Home Loan vs Rent: Which is the Smarter Financial Decision in India (2026)?
Real numbers, EMI vs rent breakdown, opportunity cost analysis, tax benefits, and clear guidance on when to buy vs when to keep renting in Indian cities.
SIP vs FD vs PPF: Which Investment Gives the Best Returns in India? (2026 Guide)
A data-driven comparison of SIP mutual funds, Fixed Deposits, and PPF — covering real return calculations, tax treatment, liquidity, and which is best for your situation.
What is Compound Interest? Formula, Real Examples & How to Use It to Build Wealth
The complete beginner's guide — the formula, compounding frequency table, Rule of 72, and why compound interest is the cornerstone of every wealth-building strategy.
How to Calculate Your Daily Calorie Intake for Weight Loss, Gain & Maintenance
BMR and TDEE formulas (Mifflin-St Jeor equation), activity multiplier table, macro breakdowns, and the right calorie targets for your specific fitness goal.
How to Calculate Running Pace: A Complete Guide for Beginners & Race Runners
Pace vs speed formulas, pace benchmarks by runner level, 5-zone heart rate training guide, and how to use negative splits to crush your next 5K or marathon.
How to Calculate GPA: Unweighted, Weighted & Cumulative GPA Explained
Step-by-step GPA calculation with worked example table, weighted vs unweighted comparison, benchmarks for college admissions, and strategies to raise your GPA.
Mastering Personal Finance: Emergency Funds, SIPs, Rule of 72 & Section 80C
The foundational principles of personal finance — compound interest, SIP mechanics, building an emergency fund, India-specific tax saving investments, and net worth tracking.
GST in India Explained: What It Is, How It's Calculated & All Tax Slabs (2026)
A beginner-friendly complete guide to GST — CGST, SGST, IGST, all 5 tax slabs, Input Tax Credit, GST registration thresholds, and formulas with real examples.
How to Calculate Your BMI Correctly & What It Really Means for Your Health
The BMI formula, all 4 WHO categories explained, why athletes and South Asians need different cut-offs, and what metrics to use alongside BMI for a complete health picture.
The Science of Sleep: Why 90-Minute Cycles Are the Secret to Waking Up Energized
Sleep stages N1 through REM explained, why waking mid-cycle causes grogginess, bedtime timing tables, and 5 evidence-based tips to radically improve sleep quality.
How to Calculate Your Loan EMI: Formula, Real Examples & 5 Tips to Save Money
Understand how banks calculate EMI for home loans, car loans, and personal loans — with step-by-step examples and strategies to reduce your total interest burden.