How to Convert Celsius to Fahrenheit (and Back) Without Guessing
Learn how to convert Celsius to Fahrenheit and back with simple formulas, oven examples and quick mental tricks you can actually remember every single time.
How to Estimate Your Electricity Bill from Units Used: A Worked Example
Learn how to estimate your electricity bill from units used, with slab rates explained, a step-by-step worked example, and simple ways to lower your bill.
How to Calculate Age from Date of Birth Exactly (Years, Months and Days)
Learn how to calculate exact age from a date of birth in years, months and days, with a step-by-step method, borrowing rules and a fully worked example.
How to Work Out Your BMI and What Your Result Actually Means
Learn how to work out your BMI with metric and imperial formulas, a worked example, and a simple explanation of what each BMI range means for adults today.
How to Calculate a Percentage of a Number Without a Calculator
Learn how to calculate a percentage of any number by hand with a clear method, worked examples for discounts, marks and bills, plus quick mental maths tricks.
How to Calculate Your Monthly Loan EMI: A Beginner’s Step-by-Step Guide
Learn how to calculate your monthly loan EMI step by step, with a simple formula, a worked example, and tips to see how interest and tenure change your payment.