21 inches
Aspect ratio 16:9
- 17 inches×1.61
- 19 inches×1.28
- 20 inches×1.16
- 21 inches×1.05
- 22 inches×0.96
- 24 inches×0.81
- 27 inches×0.64
- 28 inches×0.59
- 32 inches×0.45
- 40 inches×0.29
- 43 inches×0.25
- 48 inches×0.2
- 50 inches×0.19
- 55 inches×0.15
- 60 inches×0.13
- 65 inches×0.11
- 70 inches×0.09
- 75 inches×0.08
- 80 inches×0.07
- 85 inches×0.06
- 98 inches×0.05
Metric
- Kilometre (km)4.52×10⁻⁴ x 2.83×10⁻⁴
- Metre (m)0.45 x 0.28
- Decimetre (dm)4.52 x 2.83
- Centimetre (cm)45.23 x 28.27
- Millimetre (mm)452.32 x 282.7
- Micrometre (µm)452,322.3 x 282,701.43
- Nanometre (nm)452,322,295.36 x 282,701,434.6
- Angstrom (Å)4.52×10⁹ x 2.83×10⁹
British/American
- League9.37×10⁻⁵ x 5.86×10⁻⁵
- Mile (mi)2.81×10⁻⁴ x 1.76×10⁻⁴
- Furlong2.25×10⁻³ x 1.41×10⁻³
- Chain0.02 x 0.01
- Rod (rd)0.09 x 0.06
- Yard (yd)0.49 x 0.31
- Foot (ft)1.48 x 0.93
- Link2.25 x 1.41
- Hand4.45 x 2.78
- Inch (in)17.81 x 11.13
- Line178.08 x 111.3
- Mil (mil)17,807.96 x 11,129.98
- Thou (thou)17,807.96 x 11,129.98
Nautical
- Nautical mile2.44×10⁻⁴ x 1.53×10⁻⁴
- Fathom0.25 x 0.15
Astronomical
- Parsec (pc)1.47×10⁻¹⁷ x 9.16×10⁻¹⁸
- Light year4.78×10⁻¹⁷ x 2.99×10⁻¹⁷
- Astronomical unit (AE)3.02×10⁻¹² x 1.89×10⁻¹²
- Light minute2.51×10⁻¹¹ x 1.57×10⁻¹¹
- Light second1.51×10⁻⁹ x 9.43×10⁻¹⁰