The FinDock blog
16 practical guides to the numbers behind everyday decisions, each with worked examples and the calculators to try them yourself.
Compound Interest Explained With Realistic Examples
Small, regular amounts turn into serious sums given time, here is exactly how, with worked numbers.
Mortgage Payments: What Actually Makes Up the Monthly Cost?
Principal, interest, tax, insurance, HOA, a plain breakdown of every line in your payment.
The Difference Between Profit Margin and Markup
They sound similar and are easy to confuse, mixing them up quietly wrecks your pricing.
12 Percentage Calculations People Use Every Day
From tips to tax to test scores, the handful of percentage moves worth committing to memory.
A Practical Guide to Comparing Two Loan Offers
Rate alone doesn't tell you which loan is cheaper. Here is what to line up side by side.
Break-Even Analysis for Small Businesses
The single number that tells you when a product starts making money, and how to find it.
Understanding BMI, BMR, and TDEE Without the Confusion
Three health numbers that get muddled constantly, here's what each one actually measures.
The Numbers Every Freelancer Should Know
Rate, utilization, taxes, runway, the handful of figures that keep freelancing sustainable.
Simple Interest vs Compound Interest
The same rate, two very different outcomes, and why the difference grows with time.
A Better Way to Estimate Your Hourly Freelance Rate
Work backward from the life you need to fund, not forward from a number that feels right.
GPA Calculations: Weighted vs Unweighted
Why two students with identical report cards can have different GPAs, and what each measures.
What Your Loan Amortization Schedule Is Telling You
That long table isn't busywork, it explains where every dollar of your payment goes.
Common Mistakes When Calculating Discounts
Stacked deals, reverse math, and the traps that make a sale look better than it is.
Metric and Imperial Units: A Useful Conversion Guide
The handful of anchor conversions worth memorizing, and why routing through metric is safest.
Business Days, Calendar Days, and Deadline Planning
A deadline in \"10 days\" can mean two very different dates. Here's how to avoid the mix-up.
Reading a Percentage Change the Right Way
Why a 50% rise and a 50% fall don't cancel out, and other percentage-change traps.