Factores de conversión
MAGNITUD
SISTEMA MÉTRICO
SISTEMA INGLÉS
Aceleración
1 𝑚 𝑠2=100
⁄𝑐𝑚/𝑠2
1 𝑚 𝑠2= 3.2808
⁄𝑓𝑡/𝑠2
1 𝑓𝑡 𝑠2= 0.3048
⁄𝑚/𝑠2
Área
1 𝑚2=104𝑐𝑚2=106𝑚𝑚2=10−6 𝑘𝑚2
1 𝑚2=1550 𝑖𝑛2=10.764 𝑓𝑡2
1 𝑓𝑡2=144 𝑖𝑛2= 0.09290304 𝑚2
Densidad
1 𝑔 𝑐𝑚3= 1
⁄𝑘𝑔/𝐿 = 1000 𝑘𝑔 𝑚3
⁄
1 𝑔 𝑐𝑚3=62.428
⁄𝑙𝑏𝑚/𝑓𝑡3 = 0.036127 𝑙𝑏𝑚 𝑖𝑛3
⁄
1 𝑙𝑏𝑚 𝑖𝑛3=1728
⁄𝑙𝑏𝑚/𝑓𝑡3
1 𝑘𝑔 𝑚3= 0.062428
⁄𝑙𝑏𝑚/𝑓𝑡3
Energía, calor, trabajo
y energía especifica
1 𝑘𝐽 =1000 𝐽 = 1000 𝑁 ∙ 𝑚 = 1 𝑘𝑃𝑎 ∙ 𝑚3
1 𝑘𝐽 𝑘𝑔
⁄=1000 𝑚2𝑠2
⁄
1 𝑘𝑊ℎ = 3600 𝑘𝐽
1 𝑘𝐽 = 0.94782 𝐵𝑡𝑢
1 𝐵𝑡𝑢 = 1.055056 𝑘𝐽
1 𝐵𝑡𝑢 = 5.40395 𝑝𝑠𝑖𝑎 ∙ 𝑓𝑡3=778.169 𝑙𝑏𝑓 ∙ 𝑓𝑡
1 𝐵𝑡𝑢 𝑙𝑏𝑚
⁄=25037 𝑓𝑡2𝑠2
⁄= 2.326 𝑘𝐽 𝑘𝑔
⁄
1 𝑘𝑊ℎ = 3412.14 𝐵𝑡𝑢
Fuerza
1 𝑁 = 1 𝑘𝑔 ∙ 𝑚 𝑠 2
⁄=105 𝑑𝑖𝑛𝑎𝑠
1 𝑘𝑔𝑓 = 9.80665 𝑁
1 𝑁 = 0.22481 𝑙𝑏𝑓
1 𝑙𝑏𝑓 = 32.174 𝑙𝑏𝑚 ∙ 𝑓𝑡 𝑠2
⁄= 4.44822 𝑁
1 𝑙𝑏𝑓 = 1 𝑠𝑙𝑢𝑔 ∙ 𝑓𝑡 𝑠2
⁄
Longitud
1 𝑚 = 100 𝑐𝑚 =1000 𝑚𝑚 =106𝜇𝑚
1 𝑘𝑚 =1000 𝑚
1 𝑚 = 39.370 𝑖𝑛 = 3.2808 𝑓𝑡 = 1.0926 𝑦𝑑
1 𝑓𝑡 =12 𝑖𝑛 = 0.3048 𝑚
1 𝑚𝑖𝑙𝑙𝑎 = 5280 𝑓𝑡 = 1.6093 𝑘𝑚
1 𝑖𝑛 = 2.54 𝑐𝑚
Masa
1 𝑘𝑔 =1000 𝑔
1 𝑡𝑜𝑛𝑒𝑙𝑎𝑑𝑎 = 1000 𝑘𝑔
1 𝑘𝑔 = 2.2046226 𝑙𝑏𝑚
1 𝑙𝑏𝑚 = 0.45359237 𝑘𝑔
1 𝑜𝑛𝑧𝑎 = 28.3495 𝑔
1 𝑠𝑙𝑢𝑔 = 32.174 𝑙𝑏𝑚 = 14.5939 𝑘𝑔
1 𝑡𝑜𝑛𝑒𝑙𝑎𝑑𝑎 𝑐𝑜𝑟𝑡𝑎 = 2000 𝑙𝑏𝑚 = 907.1847 𝑘𝑔
Potencia
1 𝑊 = 1 𝐽 𝑠
⁄
1 𝑘𝑊 =1000 𝑊 = 1 𝑘 𝐽 𝑠
⁄
1 ℎ𝑝 = 745.7 𝑊
1 𝑘𝑊 =3412.14 𝐵𝑡𝑢 ℎ
⁄= 1.341 ℎ𝑝
1 𝑘𝑊 =737.56 𝑙𝑏𝑓 ∙ 𝑓𝑡 𝑠
⁄
1 ℎ𝑝 = 550 𝑙𝑏𝑓 ∙ 𝑓𝑡 𝑠
⁄= 0.7068 𝐵𝑡𝑢 𝑠
⁄
1 ℎ𝑝 = 42.41 𝐵𝑡𝑢 𝑚𝑖𝑛
⁄=2544.5 𝐵𝑡𝑢 ℎ
⁄
1 ℎ𝑝 = 0.74570 𝑘𝑊
1 𝐵𝑡𝑢 ℎ
⁄= 1.055056 𝑘𝐽 ℎ
⁄
Presión o esfuerzo, y
presión expresada
como carga
hidrostática
1 𝑃𝑎 = 1 𝑁 𝑚2
⁄
1 𝑘𝑃𝑎 = 103𝑃𝑎 =10−3𝑀𝑃𝑎
1 𝑎𝑡𝑚 = 101.325 𝑘𝑃𝑎 = 1.01325 𝑏𝑎𝑟
1 𝑎𝑡𝑚 = 760 𝑚𝑚𝐻𝑔 𝑎 0℃
1 𝑎𝑡𝑚 = 1.03323 𝑘𝑔𝑓 𝑐𝑚2
⁄
1 𝑚𝑚𝐻𝑔 = 0.1333 𝑘𝑃𝑎
1 𝑃𝑎 = 1.4504 ×10−4 𝑝𝑠𝑖 = 0.020886 𝑙𝑏𝑓 𝑓𝑡2
⁄
1 𝑝𝑠𝑖 =144 𝑙𝑏𝑓 𝑓𝑡2= 6.894757 𝑘𝑃𝑎
⁄
1 𝑎𝑡𝑚 = 14.696 𝑝𝑠𝑖 =29.92 𝑖𝑛 𝐻𝑔 𝑎 30℉
1 𝑖𝑛 𝐻𝑔 =13.60 𝑖𝑛 𝐻20 = 3.387 𝑘𝑃𝑎
Calor especifico
1 𝑘𝐽/𝑘𝑔 ∙ ℃ = 1 𝑘𝐽 𝑘𝑔 ∙ 𝐾 = 1 𝐽 𝑔 ∙ ℃
⁄⁄
1 𝐵𝑡𝑢/𝑙𝑏𝑚 ∙ ℉ = 4.1868 𝑘𝐽/𝑘𝑔 ∙ ℃
1 𝐵𝑡𝑢/𝑙𝑏𝑚𝑜𝑙 ∙ 𝑅 = 4.1868 𝑘𝐽/𝑘𝑚𝑜𝑙 ∙ 𝐾
1 𝑘𝐽/𝑘𝑔 ∙ ℃ = 0.23885 𝐵𝑡𝑢/𝑙𝑏𝑚 ∙ ℉
1 𝑘𝐽/𝑘𝑔 ∙ ℃ = 0.23885 𝐵𝑡𝑢/𝑙𝑏𝑚 ∙ 𝑅
Volumen especifico
1 𝑚3/𝑘𝑔 =1000 𝐿 𝑘𝑔 =1000 𝑐𝑚3𝑔
⁄⁄
1 𝑚3/𝑘𝑔 =16.02 𝑓𝑡3/𝑙𝑏𝑚
1 𝑓𝑡3/𝑙𝑏𝑚 = 0.062428 𝑚3/𝑘𝑔
Temperatura
𝑇(𝐾)= 𝑇(℃)+273.15
∆𝑇(𝐾)= ∆𝑇(℃)
𝑇(𝑅)= 𝑇(℉)+459.67 = 1.8 𝑇(𝐾)
𝑇(℉)= 1.8 𝑇(℃)+32
∆𝑇(℉)= ∆𝑇(𝑅)= 1.8 ∆𝑇(𝐾)
Velocidad
1 𝑚 𝑠
⁄= 3.60 𝑘𝑚 ℎ
⁄
1 𝑚 𝑠
⁄= 3.2808 𝑓𝑡 𝑠
⁄= 2.237 𝑚𝑖/ℎ
1 𝑚𝑖 ℎ
⁄= 1.46667 𝑓𝑡 𝑠
⁄= 1.6093 𝑘𝑚 ℎ
⁄
Viscosidad dinámica
1 𝑘𝑔 𝑚 ∙ 𝑠
⁄= 1 𝑁 ∙ 𝑠 𝑚2
⁄= 1𝑃𝑎 ∙ 𝑠
=10 𝑝𝑜𝑖𝑠𝑒𝑠
1 𝑘𝑔 𝑚 ∙ 𝑠
⁄=2419.1 𝑙𝑏𝑚 𝑓𝑡 ∙ ℎ
⁄
1 𝑘𝑔 𝑚 ∙ 𝑠
⁄= 0.020886 𝑙𝑏𝑓 ∙ 𝑠 𝑓𝑡2
⁄
1 𝑘𝑔 𝑚 ∙ 𝑠
⁄= 0.67197 𝑙𝑏𝑚 𝑓𝑡 ∙ 𝑠
⁄
