Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Vikki Velasquez is a researcher and writer ...

The simple interest formula is Interest = P * R * T. Many, or all, of the products featured on this page are from our advertising partners who compensate us when you take certain actions on our ...

Body mass index, or BMI for short, is a measure of body weight based on your height. For decades, BMI has been a way to measure whether someone is at a healthy weight. In general, people are ...

Annualized volatility is calculated as standard deviation times square root of periods. High annualized volatility indicates greater price variability and potential risk. Investors use annualized ...

Everybody needs a calculator. Because of this, there have been many calculators through the years, and they’re actually pretty easy to find. Most people use them to figure out stuff like how much to ...

Staying well hydrated has positive effects on virtually every system in your body. It keeps your heart pumping and your joints well lubricated, and regulates body temperature. Drinking enough water ...

Calculating staffing needs is part of human resource planning, the process of analyzing and identifying staffing gaps and surpluses. Various formulas are used to estimate and predict staffing needs, ...

The number pi (π) appears in the most unlikely places. It can be found in circles, of course—as well as in pendulums, springs and river bends. This everyday number is linked to transcendental ...

Adjusted body weight is used to calculate weight, which considers lean and fat mass. This tool can help provide more precise medical and nutritional assessments. Healthcare professionals often use ...