Guide
Length Unit Conversion: Meters, Inches, Feet, Miles — Complete Guide
How to convert meters to feet and inches, kilometers to miles, nautical miles, and other units. Conversion tables and formulas.
5 min read - 2026-03-11
Ultimate Tools Blog
Articles, guides and tips for online tools
Guide
Loan Calculator: How to Calculate Your Payment and Total Interest
How to calculate your monthly loan payment yourself. The annuity payment formula, comparing annuity and differentiated payments, and tips for choosing a loan.
7 min read - 2026-03-11
Tips
QR Codes: Where to Use Them and How to Create the Perfect QR Code
Practical tips for creating QR codes for business, marketing, and personal use. Optimal size, error correction levels, and data formats.
5 min read - 2026-03-11
Tips
Kilograms, Pounds, Ounces: How to Convert Weight Units
A quick reference for converting weight and mass units. Kilograms to pounds, grams to ounces, tonnes to stones. Tables and formulas.
4 min read - 2026-03-11
Tips
UUID, ULID, NanoID: which identifier should I choose?
Comparison of unique identifier formats: UUID v4 vs v7, ULID, NanoID - performance and use cases.
7 min read - 2026-03-11
Use Cases
Image resolutions for different platforms 2026
Optimal image sizes for Instagram, YouTube, Twitter, websites, print and mobile applications.
6 min read - 2026-03-11
Guide
Mortgage Calculator: How to Calculate Your Payment
How mortgage calculations work: annuity payments, total interest paid, and early repayment.
7 min read - 2026-03-10
Use Cases
Payroll calculation - examples for different situations
Practical examples of salary calculation: full-time, part-time, vacation pay, sick leave.
6 min read - 2026-03-10
Use Cases
Week Number: 5 Practical Scenarios
Real-world scenarios: project management, logistics, manufacturing, accounting, and sports.
5 min read - 2026-03-10
Use Cases
Scenarios for using Color Picker
Practical scenarios: creating palettes, branding, dark theme, gradients and design systems.
5 min read - 2026-03-10
Tips
Tips for Working with Colors — Design and Development
Life hacks for using the color generator for web design, UI/UX, branding, and creative projects.
5 min read - 2026-03-10
Use Cases
Deposit Calculator: 5 Use Cases
Practical scenarios: short-term and long-term deposits, deposit laddering, bank comparison.
5 min read - 2026-03-10
About this blog
Practical tutorials and deep guides for calculators, converters, generators and developer tools.