5 min read
2026-02-20
Exactly: 1 inch = 2.54 cm. But for an estimate, 2.5 is enough. Screen 27 inches ≈ 68 cm diagonally.
60 mph ≈ 96 km/h. Or use Fibonacci numbers: 5 miles ≈ 8 km, 8 miles ≈ 13 km.
Height 6 feet = 6 × 30 = 180 cm (exactly: 182.88 cm). Convenient for assessing growth.
Nautical mile = 1.852 km, land mile = 1.609 km. The difference is almost 15%.
3 nm processors are 0.000000003 m. 333,333 of these transistors fit in one millimeter.
Light year ≈ 9.46 × 10¹² km
Parsec ≈ 3.26 light years
Astronomical unit (AU) ≈ 150 million km
See also: Area Converter, Speed Converter