The pupillary distance (PD) measurement is a requirement for people who want to purchase eyeglasses. Here, find out how to measure your PD using a mirror and a ruler. Share on Pinterest Some eyewear ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Paul Sutter is an astrophysicist at The Ohio State University and the chief scientist at COSI ...

Trying to figure out the “as the crow flies” distance between two points using Google Maps is simple if you know where to look. With a few clicks on your computer or taps on your phone, Google Maps ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Fractions: If you’ve ever had difficulty with fractions, using a tape measure just ...

TVs are marketed based on the diagonal measurement of the screen. When measuring a TV for your space, always take into account the bezel and stand or mount. Divide your viewing distance by two to get ...

A person’s waistline measurement can indicate an individual’s current or future health prospects. An individual can measure their waist with a tape measure between the hip bone and the bottom of the ...