Blog
Calculators, tools & tips
Practical guides on loans, investing, tax basics in India, everyday math, and developer workflows — written to pair with ToolPilot's free calculators and utilities.
- Tools
QR Code Uses and How to Create One for Free
What QR codes are, static vs dynamic types, everyday uses, design best practices, and how to generate and test codes with ToolPilot.
6 min read - Developer
Cron Expressions Explained: A Complete Guide to Scheduling Jobs
Cron basics, the five-field format, special characters, common patterns, CI/CD scheduling, timezones, and testing expressions safely.
8 min read - Finance
Mortgage vs Rent: How to Decide Using a Calculator
Pros and cons of buying vs renting, opportunity cost of a down payment, total mortgage cost, break-even analysis, and 2026 market conditions.
8 min read - Math
Complete Unit Conversion Guide: Length, Weight, Temperature & More
Formulas for length, weight, temperature, and volume; metric vs imperial; mental shortcuts; precision; and quick reference tables.
8 min read - Finance
How PPF Interest is Calculated — Monthly Balance Method Explained
PPF interest calculation using the monthly balance method, why depositing before the 5th matters, 15-year maturity, and EEE tax benefits.
7 min read - Security
Password Security Tips: How to Create and Manage Strong Passwords in 2026
Why weak passwords fail, strong password anatomy, password managers, 2FA, common mistakes, breach checks, and passkeys.
7 min read - Tax
GST Calculation Guide: How to Add and Remove GST in India
The four GST slabs, add/remove formulas, CGST/SGST vs IGST, worked examples for every slab, and common calculation mistakes.
6 min read - Developer
How to Use Regex: A Beginner's Guide with Examples
Regex fundamentals — character classes, quantifiers, anchors, groups, common patterns for email and URLs, flags, and testing tips.
9 min read - Investing
FD vs RD: Which Fixed-Income Investment is Better in 2026?
Compare Fixed Deposits and Recurring Deposits on returns, flexibility, TDS, premature withdrawal, and ideal use cases.
6 min read - Developer
JSON Formatting Best Practices for Developers
Why consistent JSON formatting matters, indent choices, minification, common syntax errors, JSON vs YAML, and CI/CD automation tips.
6 min read - Finance
How to Calculate Compound Interest — Formula, Examples & Calculator
The compound interest formula, daily to annual compounding, a worked example in INR, the Rule of 72, and when to use a calculator.
7 min read - Finance
How to Calculate ROI — Formula, Examples & Common Pitfalls
ROI formula, annualized ROI, real-world examples in stocks and real estate, ROI vs CAGR, and common pitfalls to avoid.
6 min read - Health
Calorie Deficit Explained: How to Calculate for Weight Loss
What a calorie deficit is, BMR vs TDEE, the Mifflin-St Jeor equation, safe deficit ranges, macros, and tracking tips.
8 min read - Health
What is BMI and How to Calculate It — Formula, Chart & Limitations
BMI definition, formula, WHO categories, a quick reference chart, limitations for athletes, and when to check body fat instead.
7 min read - Health
How to Calculate Body Fat Percentage — Methods, Formulas & Healthy Ranges
US Navy and other methods, healthy ranges, body fat vs BMI, and how to measure composition consistently at home.
7 min read - Finance
How to Calculate EMI Manually — Formula, Examples & Tips
Understand the EMI formula, walk through a numeric example, and learn when to verify results with an online calculator.
6 min read - Investing
SIP vs FD: Which Investment is Better in 2026?
Compare systematic investment plans and fixed deposits on returns, risk, tax treatment, and liquidity for Indian investors.
7 min read - Tax
Income Tax Slabs 2025-26: Complete Guide for India
A clear overview of old versus new tax regime slabs and how to choose what fits your deductions and income pattern.
8 min read - Math
How to Calculate Percentage: 5 Methods Explained
From basic ratios to change-over-time and compound scenarios — practical methods with everyday examples.
6 min read - Developer
Best Free Developer Tools for 2026
A curated look at essential free utilities for formatting, security, scheduling, and content — including ToolPilot's own tools.
7 min read