Guides

Complete guides to help you understand the numbers behind the tools — explained in plain English.

Debt-to-Income Ratio: What It Is and How to Lower Yours Learn what debt-to-income ratio is, how to calculate it, and strategies to lower your DTI to qualify for better mortgage and loan rates. Emergency Fund Guide: How Much to Save and Where to Keep It How much emergency fund you need, where to keep it, and how to build it fast. Learn the 3-6 months rule and common emergency fund mistakes. Healthy BMI Range: Complete Guide to Understanding Your Number What your BMI means, healthy ranges by age and gender, limitations of BMI, and better health metrics to track alongside it. HELOC vs Home Equity Loan: Which Is Better for Cash-Out? HELOC vs home equity loan comparison. Learn differences in rates, repayment, closing costs, and LTV requirements to choose the right cash-out option. How Many Calories Should I Eat? A Science-Based Guide Calculate how many calories you should eat daily. Learn BMR, TDEE, activity factors, and calorie deficits for weight loss or muscle gain. How Much House Can I Afford? The 28/36 Rule Explained Learn how much house you can afford using the 28/36 rule. Calculate your mortgage affordability with DTI ratios, down payment, and closing costs. How Much Water Should I Drink? The Science of Hydration How much water should you drink daily? Learn the science of hydration, water intake by body weight, and factors that increase your needs. How to Calculate GPA: Weighted and Unweighted Explained Learn how to calculate GPA on weighted and unweighted scales. Step-by-step examples, grade point values, and tips to raise your GPA. How to Send Money Internationally: Cheapest and Fastest Methods Compare the cheapest ways to send money internationally. Bank vs specialized services, SWIFT fees, exchange rate markups, and transfer times. How to Start Investing: A Beginner's Guide to Building Wealth Beginner investing guide. Learn account types, asset classes, dollar-cost averaging, and how to start investing with as little as $5. Macro Tracking Guide: How to Count Macros for Any Goal Learn how to count macros for cutting, bulking, or maintenance. Calculate protein, carbs, and fat targets with a step-by-step guide. Mortgage Refinance Guide: When It Makes Sense and How to Save Complete mortgage refinance guide. Learn break-even analysis, rate-and-term vs cash-out refi, closing costs, and when refinancing saves you money. Retirement Savings by Age: Are You on Track? Retirement savings milestones by age. See how much you should have saved by 30, 40, 50, 60 and learn the 4% withdrawal rule. Square Footage Calculator Guide: Measure Any Room or Property Learn how to calculate square footage for any room or property. Formulas for rectangles, triangles, circles, and irregular shapes. What Is a Healthy Weight Loss Rate? The Truth About Losing Weight Safely Learn the healthy weight loss rate of 1-2 lbs per week. Why crash diets fail, the 3500 calorie rule, and how to lose weight sustainably.