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1:144: 1 ⁄ 12 in: 2.117 mm HOO scale - Popular for ships, aircraft, rockets, spacecraft. Occasionally used with NASCAR cars. Also some Japanese N scale trains, as well as Japanese giant robot models (such as Gunpla) and toys. Dollhouse for a dollhouse scale for 1:12 dollhouses. Commonly used for mini armor. Used for 12 mm, and 12.5 mm figure ...
1:120: 12 mm (0.472 in) Track was introduced by Peco in 2022, closely followed by a range of locomotives, rolling stock and track from Hornby. This has the accurate scale and gauge combination of 2.54 mm : 1 ft on 12 mm track, as has been used by European and American hobbyists, who refer to this as TT. TT3 or 3 mm: 1:102: 12 mm (0.472 in)
1:45: 24.0 mm O-scale models of 3 ft 6 in narrow-gauge prototypes running on 24 mm gauge track. Virtually unknown outside Japan and Taiwan On2: 1:48: 12.7 mm O-scale models of 2 ft narrow-gauge prototypes running on 1 ⁄ 2 in (12.7 mm) gauge track. On30 gauge: 1:48: 16.5 mm Narrow gauge O-scale models running on HO gauge track.
Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).
conversion factor/m combinations SI: gigametre: Gm Gm US spelling: gigameter: 1.0 Gm (620,000 mi) megametre: Mm Mm US spelling: megameter: 1.0 Mm (620 mi) kilometre: km km US spelling: kilometer: 1.0 km (0.62 mi) km mi; hectometre: hm hm US spelling: hectometer: 1.0 hm (330 ft) decametre: dam dam US spelling: dekameter: 1.0 dam (33 ft) metre: m ...
1 km 2 means one square kilometre, or the area of a square of 1000 m by 1000 m. In other words, an area of 1 000 000 square metres and not 1000 square metres. 2 Mm 3 means two cubic megametres, or the volume of two cubes of 1 000 000 m by 1 000 000 m by 1 000 000 m, i.e. 2 × 10 18 m 3, and not 2 000 000 cubic metres (2 × 10 6 m 3).
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.
Often measured as "eye height", giving ~1:160 for 10 mm scale, and figures being 10-12 mm tall overall. 12 mm: 2 mm: ≈1:152 – 1:144: 1:152 is called 2 mm finescale in railway modelling. A newer scale, growing in popularity, closely related to 10 mm. 1:144 scale used for Japanese giant robot models (such as Gunpla) and toys.