How to convert the measurement unit of ancient people to the present? How many meters is the height over the present?

How to convert the measurement unit of ancient people to the present? How many meters is the height over the present?

In Shang Dynasty, one foot is 16.95cm, according to this scale, the height of a person is about one Zhang, so it is called "husband"; in Zhou Dynasty, one foot is 23.1cm; in Qin Dynasty, one foot is 23.1cm; in Han Dynasty, one foot is 21.35-23.75cm; in Three Kingdoms, one foot is 24.2cm; in Southern Dynasty, one foot is 25.8cm; in Northern Wei Dynasty, one foot is 30.9cm

What's the length and width of the 12.1-inch 16:9 screen!

Back to LZ: the size of the LCD is the length of the diagonal. And 1 inch = 2.54 cm. So the diagonal length is: 12.1 * 2.54 = 30.73; according to the Pythagorean theorem, length: width: diagonal = 4:3:5. So the length is 4 / 5 * 30.73 = 24.59, and the width is 3 / 5 * 30.734 = 18.45. I hope it can help the landlord

A TV screen is about 50cm long and 40cm wide. How many inches is it?

Diagonal length (diagonal) = root (50 * 50 + 40 * 40) = 64cm = 25 inches
One centimeter is 0.3937 inch