Guides

Short, factual answers to common health and money questions.

• How Much Emergency Fund Do You Need?

  A plain-English guide to sizing an emergency fund: 3–6 months of essential expenses, when to save more, and how to estimate time to goal.

• How Is a Mortgage Payment Calculated?

  Learn the standard amortization formula behind monthly mortgage and loan payments, with a worked example and key terms like APR and principal.

• What Is TDEE and How Do You Use It?

  TDEE explained: how total daily energy expenditure is estimated from BMR and activity level, and how to use it for weight goals.

• 7 Money and Health Numbers You Should Know (With Simple Examples)

  Seven essential money and health numbers — emergency fund, mortgage payment, debt payoff, 50/30/20 budget, compound growth, TDEE and net worth — each with a worked example.