Tabla de equivalencias

•Longitud
1m = 100cm
1m = 1000mm 1cm = 10mm
1km = 1000m
1angstromm (Å) = 1x10⁻⁸1m=3.28 pies
1m=1.093 yardas
1milla=1.609 km
1milla marina= 1852km
1pie= 12 pulgadas
1pulgada= 2.54cm
1pie=30.48cm
1yarda= 3pies
1yarda= 91.44cm

•Masa
1Kg = 1000 g1Kg = 2.2 Libras
1Libra = 454 g
1Tonelada = 1000 Kg

•Tiempo
1h = 3600 s
1h = 60 min
1Min = 60 s
1Año = 365.24 dias
1Siglo = 100 años
1Decada = 10 años
1Lustro= 5 años
1Día = 86164 s
•Area o superficie
(1m)² = (100cm) ² = 1x10⁴ cm²
(1m) ² = (3.28 pies) ² = 10.76 pies ²
1 area = 100 m²
1 hectarea = 10 000 m²
1 acre = 4840yardas²
1 acre = 43560 pies²
1 acre = 4048.33 m²

•Volumen
1 m³ = 1000 litros
1 m³ = 1x10⁶ cm³
1 litro = 1000 ml
1 ml = 1 cm³
1 litro = 1 dm³
1 galon = 3.785litros

•Velocidad

1km/hr = 0.2778 m/s

1milla/hr = 1.609 km/hr

1 ms/seg = 3.28 pies/seg

1 nudo = (1 milla marina)/hr

1 nudo = 1.852 km/h

•Fuerza
1 Kgf =9.8 N
1 Kgf = 1000 gf
1 N = 1x10⁵ dinas
1 Kgf = 2.2 lbf
1 lbf = 454 gf
1 lbf = 4.448 N

•Trabajo y energia
1joule (J) = 0.24cal
1cal=4.18J
1kw•h = 3.6x10⁶J1ev=1.602x10⁻¹⁹J
•Potencia
1 hp = 746 w
1 cv = 736 w
1 w = 1.341x10 ⁻⁵
1 hp = 0.178 kcal/seg
•Densidad

1 g/cm³ = 1000 kg/m³

1 g/cm³ = 1 g/ml

1 g/cm³ = 1kg/litro
•Presion
1atm=760mm de Hg
1atm=76cm de Hg
1pa=1n/m²
1atm=1.013x10⁵n/m²
1cm de Hg=13.6gf/cm²
1cm de Hg=0.0136kgf/cm²
1mm de Hg= 1.36gf/cm²
1mm de Hg=(1.36x10⁻³kgf)/cm²
760mm de Hg= 1.0336kgf/cm²
1torr=1mm de Hg
1bar=1x10⁵n/m²
•Carga eléctrica
1 c = 6.24x10¹⁸ electrones
1 electrón = -1.6x10⁻¹⁹ c
1 protón = 1.6x10⁻¹⁹ c