Precise answers for finance, fitness, building and science.

A US cup holds 8 fluid ounces (236.6 mL), but the legal cup is 240 mL, the metric cup 250 mL, and the old UK cup 284 mL. Here's the full table, a quick fl-oz-to-cups chart, and the fluid-vs-weight-ounce trap that ruins recipes.

The 10,000-steps target started as a 1965 Japanese marketing slogan. The mortality research says benefits plateau around 7,000-8,000 steps a day, and even less for older adults. Here's the evidence and a realistic goal.

$30 an hour comes to $62,400 a year at full time, or about $5,200 a month. Here's the full breakdown by pay period, what's left after 2026 taxes, and how part-time hours and unpaid time off change the number.