Calculator Guides

These guides explain the formulas behind common calculators and show how to apply them in real life. Each guide includes worked examples, practical tips, and links to the calculators so you can put the concepts into action right away.

Percentage Calculation Guide

Learn percent formulas, real-world use cases, and common pitfalls.

Loan and Mortgage Guide

Understand amortization, rates, and how to compare loan offers.

Compound Interest Guide

See how compounding works with formulas, examples, and savings tips.

BMI and Body Fat Guide

Interpret BMI and body fat estimates with practical context.

Cooking Conversions Guide

Convert cups to grams, temperatures, and scale recipes accurately.

Average, Median, and Mode Guide

Choose the right measure of central tendency for your data.

Ratio and Proportion Guide

Simplify ratios and solve proportion problems with confidence.

Budgeting Guide

Build a practical budget and improve your savings rate.

Water Intake Guide

Estimate hydration needs and adjust for activity and climate.

Date Difference Guide

Calculate time between dates and plan schedules accurately.