easyutils.io blog — practical guides on calculators, financial decisions, and developer tools.
2026-05-10 · 11 min read
Net Salary in Türkiye 2026: A Practical Guide to Gross-to-Net Calculation
How gross salaries become net pay in Türkiye for 2026 — SGK, income tax, stamp duty, AGİ replacements, and the exemption that changes how everyone gets paid.
2026-05-08 · 9 min read
The 'Interest-Free Installment' Trick: How to Spot the Hidden Cost
Faizsiz taksit is rarely free. Here's how to spot the hidden interest baked into the sticker price, and three quick tests you can do at the register.
2026-05-05 · 8 min read
BMI Has Real Limits — Here's What to Look at Instead
BMI is a screening tool, not a diagnosis. Where it works, where it fails, and the complementary metrics doctors actually use.
2026-05-03 · 11 min read
Rent or Buy in Türkiye 2026: A Framework, Not a Slogan
The honest math behind rent-vs-buy in a high-inflation market — opportunity cost, real returns, illiquidity, and the personal factors that override the spreadsheet.
2026-05-01 · 9 min read
JWT Security Pitfalls Every Engineer Should Know
Algorithm confusion, the none attack, secret leaks, and the design choices that lead to subtle JWT-based auth bugs. With concrete fixes.
2026-04-28 · 8 min read
CORS Errors, Demystified: A Step-by-Step Troubleshooting Guide
Stop guessing at CORS. A concrete walk-through of preflight, simple requests, credentials, and the five errors that cover 95% of cases.
2026-04-26 · 9 min read
BMR, TDEE, and the Honest Math of Weight Loss
What BMR and TDEE actually measure, why most online estimates are off by ~15%, and the realistic deficit math behind sustainable weight change.
2026-04-23 · 8 min read
Nominal vs Real Returns: Why Your %50 Gain Might Actually Be a Loss
The single most important concept for investing in high-inflation economies. With examples from TL deposits, USD assets, and equities.
2026-04-21 · 9 min read
LLM Cost Optimization: The Levers That Actually Move the Needle
Where LLM bills come from, the optimizations that pay back immediately, and the over-engineered ones that don't.
2026-04-19 · 8 min read
Webhook Signatures, Explained Properly
Why webhook signatures exist, how HMAC verification works in practice, and the implementation mistakes that turn signed webhooks into unsigned ones.
2026-04-17 · 7 min read
Cost-Per-Use: The Spending Frame That Quietly Pays You Back
Why a 4,000 TL pair of shoes you wear daily costs less than an 800 TL pair worn twice. And the limits of this mental model.
2026-04-15 · 8 min read
Evaluating a Job Offer: The Eight Factors That Outlast Salary
Salary is necessary but not sufficient. The factors that determine whether you'll thrive — and a method to weigh them.