Explainers · Data & statistics · Cheat sheets
Blog — the numbers behind everyday questions.
Short, data-backed reads on money, health and everyday math. Each one front-loads the answer, cites real sources, and links to the free tool that runs the numbers for you.
Latest posts
9 articles · Updated June 2026
The Minimum Payment Trap (RabixAI Study)
Original analysis: paying only the minimum on the average $6,000 card balance takes 18 years and $9,623 in interest. Full data and method.
Study · 7 min read · Jun 2026
APR vs APY: The Difference, Explained Simply
APR ignores compounding, APY includes it. The real difference, a side-by-side table, and why it matters on loans and savings.
Finance · 5 min read · Jun 2026
What Is a Calorie Deficit?
Eat less than you burn and the body uses stored fat. How it works, how big the deficit should be, and how to find your number.
Health · 5 min read · Jun 2026
BMI vs Body Fat Percentage
BMI screens height vs weight; body fat measures composition. A comparison table and which number to actually trust.
Health · 5 min read · Jun 2026
Tax Season 2026: Free Calculators
Estimate take-home pay, sales tax and the percentages on your return — three free tools, no sign-up, all math shown.
Finance · 5 min read · Jun 2026
The Unit Conversion Cheat Sheet
cm to inches, kg to lb, °F to °C — exact factors, a reference table and the formulas you can keep on hand.
Reference · 4 min read · Jun 2026
Pay Off Credit Card Debt Faster
Avalanche vs snowball, compared honestly. A worked $6,000 example showing how much faster — and cheaper — each method clears the balance.
Finance · 6 min read · Jun 2026
What Counts as a Good GPA?
The 4.0 scale explained: weighted vs unweighted, a letter-grade conversion table, and what colleges actually look at beyond the number.
Education · 6 min read · Jun 2026
How Much Should You Tip in 2026?
A calm guide to the tipping-fatigue era: real norms by service type, a reference table, and how to split a check fairly.
Everyday · 6 min read · Jun 2026