Trends & guides
The Journal
Practical, current writing on the numbers that matter — rates, taxes, health metrics, and the math behind everyday decisions. Every piece links back to the calculators that put it to work.
🏷️ Is It Actually a Deal? The Math of Holiday Sales
Stacked discounts, inflated 'original' prices, buy-more-save-more — holiday sales are designed to feel like deals. Here's the quick math that tells you which ones really are.
October 21, 2026 · 4 min read
🗳️ Reading the Polls: What the Margin of Error Really Means
With the midterms days away, poll numbers are everywhere — and routinely misread. Here's the math behind the margin of error, and how to tell a real lead from a statistical tie.
October 14, 2026 · 4 min read
💰 Year-End Retirement Moves: Maxing Out Before the Deadline
The calendar — not just your budget — decides how much you can save for retirement this year. Here's what to top up before December 31, and what can wait.
October 7, 2026 · 4 min read
😴 Falling Back: How to Protect Your Sleep When Clocks Change
The clocks turn back in early November, handing you an 'extra' hour that can quietly wreck your sleep for a week. Here's how to think about the reset — and land it smoothly.
September 30, 2026 · 4 min read
❄️ Your Winter Energy Bill: What Drives It and How to Cut It
Heating costs are projected to climb again this winter. Here's how to find the watts and BTUs that actually drive your bill — and where cutting back pays off most.
September 23, 2026 · 4 min read
🎰 The Math of the Lottery: Odds, Combinations, Expected Value
When jackpots roll into the hundreds of millions, the numbers get irresistible — and misleading. Here's the actual math behind the odds and what a ticket is really worth.
September 16, 2026 · 4 min read
🏦 CD Ladders: When to Lock In a Savings Rate
With savings yields staying stubbornly high in 2026, the question isn't just where to park cash — it's whether to lock a rate in. Here's how a CD ladder answers both.
September 9, 2026 · 4 min read
🏃 Heart-Rate Training Zones: What Zone 2 Actually Does
Zone 2 is everywhere in fitness right now. Here's what the heart-rate zones really mean, how to find yours, and how to use them without a lab test.
September 2, 2026 · 4 min read
🚗 What Your Commute Really Costs (and How to Cut It)
Gas is only the part you notice. Once you add wear, tolls, parking, and time, the real price of getting to work can reshape how — and how often — you go.
August 26, 2026 · 4 min read
📊 Percent vs. Percentage Points: The Difference That Changes the Story
A rate going from 2% to 5% rose either '3 points' or '150%' — same event, wildly different headlines. Here's how to tell them apart and never be misled again.
July 29, 2026 · 3 min read
🏠 APR vs. Interest Rate: What Your Mortgage Number Actually Means
Two rates sit on every mortgage quote, and they're almost never the same number. Here's what each one includes, and which to trust when you compare offers.
July 28, 2026 · 3 min read
❤️ Beyond BMI: A Clearer Way to Read Your Body Composition
BMI is a fast screen, not a diagnosis. Here's what it gets right, where it misleads, and the simple measurements that tell you far more.
July 21, 2026 · 2 min read
🧾 The Fair Way to Split a Bill: Tips, Tax, and Uneven Shares
Splitting evenly is easy until someone only had a salad. Here's how to handle tip, tax, and mismatched orders without anyone feeling short-changed.
July 14, 2026 · 2 min read