For example, if you started out at 250 pounds and recently lost 10 pounds, you would calculate weight loss percentage like this: 10/250 x 100. This would show you that you’ve lost 4% of your weight.

Everyday Health’s weight loss calculator can help you estimate your calorie needs for weight loss. Learn more about how many calories you need and how they are estimated.

You do this by either reducing the extra calories you're consuming or burning more than what you're eating with exercise. You've probably heard of the 3,500-calorie deficit rule , which states ...

How do scientists measure or calculate the weight of a planet? Barry Lienert, a geophysicist at the University of Hawaii, provides the following explanation. We start by determining the mass of ...

But weight, or how heavy something is, is the strength of the force of gravity that a planet exerts on you. When you weigh yourself on a scale on Earth, you are measuring Earth’s pull, or ...