Guides & How-tos

Popular guides

Editor’s picks: the guides we recommend starting with.

• How to Calculate Compound Interest Monthly (With Examples) — Learn the monthly compound interest formula, see worked examples with and without monthly deposits, and check your numbers with a free calculator.
• How Much House Can I Afford? A Simple Step-by-Step Method — Work out a realistic home budget from your income, debts and down payment using debt-to-income ratios, then test it with a free mortgage calculator.
• How to Calculate Percentage Increase and Decrease — The percentage increase formula explained simply, with examples for prices, pay and grades, plus percentage decrease, reverse percentages and common traps.
• How to Calculate EMI: Formula, Example and Tips — Learn the EMI formula for home, car and personal loans, work through a full example by hand, and see how rate and tenure change your monthly payment.
• How to Reduce Image Size Without Losing Quality — Make photos and graphics smaller without visible quality loss: resize to the display size, pick the right format, set a sensible quality and strip metadata.
• How Many Words Is a Page? Single vs Double Spaced — How many words fit on a page single or double spaced, how font, size and margins change it, and quick conversions from word count to pages and speaking time.
• What Is Base64 Encoding? How It Works, With Examples — Base64 explained simply: how it turns bytes into text, a step-by-step example, why output grows by a third, padding, URL-safe Base64 and when not to use it.
• How to Win 2048: The Corner Strategy Step by Step — Beat 2048 with the corner strategy: keep your biggest tile in a corner, build a chain, choose safe moves, avoid common traps and keep going past 2048.

Latest articles

Money & Finance · October 5, 2026 · 5 min read

How to Calculate Compound Interest Monthly (With Examples)

Learn the monthly compound interest formula, see worked examples with and without monthly deposits, and check your numbers with a free calculator.

Money & Finance · October 5, 2026 · 5 min read

How to Calculate EMI: Formula, Example and Tips

Learn the EMI formula for home, car and personal loans, work through a full example by hand, and see how rate and tenure change your monthly payment.

Money & Finance · October 5, 2026 · 5 min read

How Much House Can I Afford? A Simple Step-by-Step Method

Work out a realistic home budget from your income, debts and down payment using debt-to-income ratios, then test it with a free mortgage calculator.

Money & Finance · October 5, 2026 · 5 min read

How to Calculate Sales Tax (and Remove It From a Total)

Learn how to add sales tax, GST or VAT to a price, how to work backwards to the pre-tax amount, and the mistakes that give wrong answers.

Money & Finance · October 5, 2026 · 5 min read

How to Convert an Hourly Wage to a Yearly Salary

Turn hourly pay into yearly, monthly and weekly salary (and back), with the 2,080-hour rule, quick mental shortcuts and the details that change the result.

Money & Finance · October 5, 2026 · 5 min read

Profit Margin vs Markup: What’s the Difference?

Margin and markup use the same numbers but answer different questions. Learn both formulas, convert between them and price products correctly.