In most gyms, one plate means a 45-lb (20-kg) disc per side on a bar, totaling 135 lb with a 45-lb bar.

In walking, one step is about 0.7–0.8 meters; in military drill a step is 0.76 meters.

In pharmacology, half-life is the time it takes for a drug’s level in the blood to fall by 50%.

For a 14-year-old, “overweight” means a BMI-for-age at or above the 85th percentile and below the 95th percentile.

One home kit usually costs $1–$15, while clinic or lab testing ranges from free to about $100.

A typical teacup holds around 150–180 mL; measuring cups labeled “1 cup” range from 236.6 to 250 mL depending on the standard.

In insulin dosing, 1 unit equals 0.01 mL for U-100; U-200 is 0.005 mL; U-300 is 0.0033 mL; U-500 is 0.002 mL.

One kilojoule equals about 0.239 food Calories (kcal) used in nutrition.

One yard equals 91.44 centimeters exactly by the international yard definition of 0.9144 meters.

One metric tonne equals exactly 1,000 kilograms by the SI definition.