Guides
Clear, no-jargon explainers for the numbers that come up in everyday life — each one paired with a free calculator so you can put it into practice.
How to Calculate Percentage: 3 Easy Methods
The three percentage calculations that cover almost everything — plus a mental-maths shortcut you'll actually remember.
4 min readHow Compound Interest Works (With Examples)
Why money grows faster the longer you leave it — the one concept behind almost all long-term wealth.
5 min readHow Much House Can You Afford?
The budgeting rule of thumb, how it differs from what lenders actually allow, and the costs people forget.
5 min readHow to Convert Marks to a Percentage
One formula turns marks into a percentage — plus how to handle several subjects and papers worth different amounts.
3 min readWhat Is a Good Debt-to-Income Ratio?
What your DTI actually measures, the bands lenders tend to use, and simple ways to bring it down.
4 min readHow to Calculate BMI and What It Means
The BMI formula, what the categories mean, and the honest limits of what a single number can tell you.
4 min readHow Much Should You Save for Retirement?
Rules of thumb worth knowing, why time beats amount, and how to turn a distant target into this month's saving.
5 min readMargin vs Markup Explained
Two words, same numbers, very different results — and why mixing them up quietly eats your profit.
4 min readHow to Pay Off Credit Card Debt Faster
Avalanche saves the most money; snowball keeps you motivated. Here's how each works and how to choose.
5 min readHow to Calculate Your Net Worth (and Why It Matters)
One number that captures your whole financial position — and why watching it move matters more than your salary.
4 min readUnderstanding Your Daily Calorie Needs (BMR & TDEE)
What BMR and TDEE actually mean, how activity changes the number, and why any estimate is a starting point.
4 min readHow to Calculate a Discount and Sale Price
The quick way to work out any sale price in your head — plus how stacked discounts and tax really add up.
3 min readHow to Calculate Your GPA
How grade points and credit hours combine into a GPA — and how to work out the grades you still need.
4 min readWhat Is the 4% Rule (Safe Withdrawal Rate)?
A simple rule for turning a nest egg into annual income — where it came from, and where it wobbles.
5 min readShould You Refinance Your Mortgage?
When refinancing actually pays off, how to find your break-even point, and the traps that erase the savings.
5 min readHow to Calculate Cap Rate (And What It Leaves Out)
The formula takes ten seconds. Deciding what belongs in net operating income is the part that actually matters.
6 min readWhat Is a Good DSCR for a Rental Property?
Why 1.25 gets quoted everywhere, why your lender's number will be lower than yours, and the only three ways to move it.
6 min readCap Rate vs Cash-on-Cash vs Cash Flow: Which to Use When
They disagree on purpose. Learning to read the disagreement tells you more than any single number.
6 min readHow Much Life Insurance Do I Need? The DIME Method
A flat multiple of salary is a shortcut. DIME adds up what your family would actually need to cover, and subtracts what you already have.
6 min readTerm vs Whole Life Insurance: What Actually Differs
The premium gap is obvious. What it actually buys you — and what 'invest the difference' really means — is the part worth understanding first.
6 min readHow to Read Your Paycheck: Gross Pay to Take-Home Pay
The gap between gross pay and what actually lands in your account isn't one number — it's several. Here's what each line on your pay stub is actually doing.
6 min readMarginal vs Effective Tax Rate: What Actually Differs
A raise into a 'higher bracket' sounds like a pay cut. It isn't — and the reason why is the whole point of this guide.
5 min read