Body mass index (BMI) is a number based on height and weight that can help estimate whether someone is at a healthy weight. For most adults, BMI is a useful guide, but it doesn’t tell the whole story.

Move over, Calculator. The Messages app can tackle advanced calculations and even convert numbers to different formats.

Build muscle, improve mobility, and boost energy after 50 with this fast eight-minute morning circuit from trainer Josh York.

Learn how to use Calculator on Windows 11 for quick math, conversions, and date calculations in just a few steps.