＜例＞「1-1/2"」は、「1インチ」足す「1/2インチ」の意味です。つまり、1.5インチと同じ意味です。換算すれば、1.5ｘ25.4＝38.1ミリということになります。「2-7/8"」は、「2インチ」足す「7/8インチ」。換算すると73.0ミリということになります。 ☟　インチ早見表　☟ インチ 1" 2" 3" 4" 5" 6" 7" 8" 9" 10" 11" 12" ミリ 25.4mm 50.8mm 76.2mm 101.6mm 127mm 152.4mm 177.8mm 203.2mm 228.6mm 254mm 279.4mm 304.8mm インチ 1/2" 1/4" 1/3" 1/8" 3/8" 5/8" 7/8" 1/16" 3/16" 5/16" 7/16" 9/16" 11/16" 13/16" 15/16" 1/32 ミリ 12.70mm 6.35mm 19.05mm 3.18mm 9.53mm 15.88mm 22.23mm 1.59mm 4.77mm 7.94mm 11.12mm 14.29mm 17.47mm 20.64mm 23.82mm 0.8mm +1” 38.10mm 31.78mm 44.45mm 28.58mm 34.93mm 41.28mm 47.63mm 26.99mm 30.17mm 33.34mm 36.52mm 39.69mm 42.87mm 46.04mm 49.22mm 26.2mm +2” 63.50mm 57.15mm 69.85mm 53.98mm 60.33mm 66.68mm 73.03mm 52.39mm 55.57mm 58.74mm 61.92mm 65.09mm 68.27mm 71.44mm 74.62mm 51.6mm +3” 88.90mm 82.55mm 95.25mm 79.38mm 85.73mm 92.08mm 98.43mm 77.79mm 80.97mm 84.14mm 87.32mm 90.49mm 93.67mm 96.84mm 100.02mm +4” 114.3mm 108mm 120.7mm 104.8mm 111.1mm 117.5mm 123.8mm 103.2mm 106.4mm 109.5mm 112.7mm 115.9mm 119.07mm 122.24mm 125.42mm 102.4mm インチ 3/32" 5/32" 7/32" 9/32" 11/32" 13/32" 15/32" 17/32" 19/32" 21/32" 23/32" 25/32" 27/32" 29/32" 31/32" ミリ 2.39mm 3.97mm 5.56mm 7.15mm 8.74mm 10.32mm 11.91mm 13.5mm 15.09mm 16.67mm 18.26mm 19.85mm 21.44mm 23.02mm 24.61mm +1” 27.79mm 29.37mm 30.96mm 32.55mm 34.14mm 35.72mm 37.31mm 38.9mm 40.49mm 42.07mm 43.66mm 45.25mm 46.84mm 48.42mm 50.01mm +2” 53.19mm 54.77mm 56.36mm 57.95mm 59.54mm 61.12mm 62.71mm 64.3mm 65.89mm 67.47mm 69.06mm 70.65mm 72.24mm 73.82mm 75.41mm +3” 78.59mm 80.17mm 81.76mm 83.35mm 84.94mm 86.52mm 88.11mm 89.7mm 91.29mm 92.87mm 94.46mm 96.05mm 97.64mm 99.22mm 100.81mm +4” 103.99mm 105.57mm 107.16mm 108.75mm 110.34mm 111.92mm 113.51mm 115.1mm 116.69mm 118.27mm 119.86mm 121.45mm 123.04mm 124.62mm 126.21mm 77mm