Blog
Plain-English guides on finance, health, and education — each paired with a free calculator so you can run the numbers yourself.
How Is Your Due Date Calculated — And How Accurate Is It?
Due dates are worked out from your last period, not conception. Here's the formula, why it assumes things that may not apply to you, and why almost nobody delivers on the day.
What's Actually in Your Monthly Mortgage Payment?
The loan repayment is only part of it. Here's what PITI means, why your payment can rise on a fixed-rate loan, and how much house you can realistically afford.
SAT Score Ranges Explained: What Counts as a Good Score?
What the 400–1600 scale actually means, how percentiles work, and how to set a target score based on your college list rather than the national average.
How Student Loan Payoff Actually Works
Where your monthly payment goes, why the balance barely moves at first, and what an extra $100 a month is really worth over the life of a loan.
How Many Calories Should You Eat Per Day?
Your daily calorie need isn't one number — it's a calculation based on your body, your activity, and your goal. Here's how the math works and where the estimates go wrong.
What Is a Good GPA for College Admissions?
There is no single number that counts as a good GPA. Here's what admissions officers actually look at, how weighted and unweighted scales differ, and where you realistically stand.
Roth IRA vs Traditional IRA: Which One Should You Actually Open?
The difference comes down to when you pay tax. Here's how to decide between a Roth and a Traditional IRA, with the 2026 contribution and income limits.
401(k) Explained: A Plain-English Guide for Anyone Just Getting Started
A 401(k) is likely the most powerful retirement tool available to working Americans — and one of the most confusing. Here's everything you need to know to set it up and use it well.
What Your BMI Actually Means — and Where the Number Falls Short
BMI is the most widely used body weight metric in the US — but it's also widely misunderstood. Here's what it measures, what it misses, and how to put your number in context.
What Is Debt-to-Income Ratio — and Why Lenders Care So Much About It
Your DTI ratio is often the first thing a lender checks — before your credit score. Here's how to calculate it, what counts as debt, and how to get your number into shape.