Compound Interest Explained: Why Einstein Called It the 8th Wonder
The plain-English version of why $200/month can become $200,000 — and why waiting 10 years to start will cost you far more than you think.
Articles
Practical explainers on money, health, and everyday math — written to help you make better decisions, not to sell you something.
How Much House Can I Afford on $100k Salary?
The 28/36 rule, what lenders actually check, and why the number they approve you for is almost always more than you should spend.
15-Year vs 30-Year Mortgage: Which Actually Costs Less?
A 15-year mortgage saves six figures of interest — but the higher payment trades off cash flow and flexibility. How to pick the right one.
The Real Cost of a Car Loan (with Amortization Breakdown)
The sticker price is just the start. Here's what a 72-month auto loan actually costs once you add interest, fees, and the hidden cost of depreciation.
BMI Isn't Everything — What the Numbers Actually Mean
BMI was invented in the 1830s as a population statistic, not a personal health verdict. Here's how to interpret yours, and what else to measure.
How Many Calories Do I Actually Need? (TDEE Explained)
BMR, TDEE, activity multipliers, and why the calorie labels on your food are probably wrong by 20%. A practical guide to your real daily needs.
First-Time Homebuyer Guide: Every Cost Nobody Warns You About
Down payment and closing costs are just the start. Here are the 14 expenses first-time buyers consistently underestimate, plus how much to budget for each.
Should You Pay Off Your Mortgage Early? (The Break-Even Math)
Paying off a 3% mortgage vs investing in an index fund at 7% looks like a no-brainer — until you factor in risk, liquidity, and sleep-at-night value.
Refinance Calculator: When It's Worth It and When It's a Trap
The 1% rule, break-even months, and the fine print on cash-out refis. A practical framework for deciding whether refinancing actually saves you money.
How Much Water Should You Drink? (The 8-Glasses Myth)
The 8x8 rule was never based on evidence. Here's what current research actually says about hydration, and a formula that accounts for your body and activity.
Pregnancy Due Date Calculator: How It's Actually Calculated
Naegele's rule, why due dates are really a range, and what to do when ultrasound dating and LMP dating disagree.
Retirement at 60 on $500k: Is It Possible?
The 4% rule, Social Security timing, healthcare before Medicare, and three scenarios for making $500k last 30 years without running out.
Salary to Hourly: What Are You Really Making?
Your $75k salary is not $36/hour. After taxes, benefits, commute, and unpaid overtime, most salaried workers earn 20-30% less than the sticker number suggests.
The 50/30/20 Budget Rule (With a Calculator)
Senator Warren's simple budgeting framework: 50% needs, 30% wants, 20% savings. Where it works, where it doesn't, and how to adapt it to high-cost cities.
Tip Calculator Etiquette Around the World
15% in the US, 0% in Japan, a rounding-up in most of Europe. A country-by-country guide to tipping without offending — and how much to actually leave.