9.2. Unit Converions#

Length#

1 \(m\)

=

100 \(cm\)

=

1000 \(mm\)

=

3.2808 \(ft\)

=

39.370 \(in\)

=

1.0936 \(yd\)

2.5400 \(cm\)

=

1 \(in\)

1 \(ft\)

=

12 \(in\)

5280 \(ft\)

=

1 \(mi\)

1 \(km\)

=

0.62137 \(mi\)

Mass#

1 \(kg\)

=

1000 \(g\)

=

2.20462 \(lb_m\)

=

0.06852 \(slug\)

1 \(slug\)

=

32.174 \(lb_m\)

1 \(ton\)

=

2000 \(lb_m\)

Force#

1 \(N\)

=

0.22481 \(lb_f\)

=

1 \(kg \ m/s^2\)

Pressure#

1 \(kN/m^2\)

=

1 \(kPa\)

=

20.8855 \(lb_f/ft^2\)

=

0.14504 \(lb_f/in^2\)

=

0.14504 \(psi\)

=

0.2953 \(in \ Hg\)

=

4.0146 \(in \ H_2O\)

101.325 \(kPa\)

=

1 \(atm\)

=

14.6959 \(psi\)

=

760 \(mm \ Hg \ at \ 0^{\circ} C\)

1 \(bar\)

=

\(10^5\) \(Pa\)

Stress / Modulus#

1 \(kN/m^2\)

=

1 \(kPa\)

=

0.14504 \(ft_f/in^2\)

=

0.14504 \(psi\)

1 \(MN/m^2\)

=

1 \(MPa\)

=

1000 \(kPa\)

=

145.04 \(ft_f/in^2\)

=

145.04 \(psi\)

1 \(GN/m^2\)

=

1 \(GPa\)

=

1000 \(kPa\)

=

1.4504 \(\times \ 10^5 \ psi\)

=

145.04 \(ksi\)

1 \(kWh\)

=

3600 \(kJ\)

=

3412 \(Btu\)

Energy / Work / Heat#

1055.6 \(J\)

=

1 \(Btu\)

4.1868 \(J\)

=

1 \(cal\)

252 \(cal\)

=

1 \(Btu\)

1 \(kWh\)

=

3600 \(kJ\)

=

3412 \(Btu\)

Volume#

1 \(m^3\)

=

1000 \(L\)

=

35.3134 \(ft^3\)

=

264.17 \(gal\)

Temperature#

T(\(K\))

=

T (\(^{\circ}C\)) + 273.15

=

T (\(^{\circ}R\)) / 1.8

=

[ T (\(^{\circ} F\)) + 459.67 ] / 1.8