B – Conversion Factors

Table B1 Length

$1~\mathrm{cm}^2=0.155~\mathrm{in.}^2$

$1~\mathrm{m}^2=10^4~\mathrm{cm}^2=10.76~\mathrm{ft}^2$

$1~\mathrm{in.}^2=6.452~\mathrm{cm}^2$

$1~\mathrm{ft}^2=144~\mathrm{in.}^2=0.0929~\mathrm{m}^2$

$1~\mathrm{litre}=1000~\mathrm{cm}^3=10^{-3}~\mathrm{m}^3=0.03531~\mathrm{ft}^3=61.02~\mathrm{in.}^3$

$1~\mathrm{ft}^3=0.02832~\mathrm{m}^3=28.32~\mathrm{litres}=7.477~\mathrm{gallons}$

$1~\mathrm{gallon}=3.788~\mathrm{litres}$

	$\mathbf{s}$	$\mathbf{min}$	$\mathbf{h}$	$\mathbf{day}$	$\mathbf{yr}$
1 second	$1$	$1.667\times10^{-2}$	$2.778\times10^{-4}$	$1.157\times10^{-5}$	$3.169\times10^{-8}$
1 minute	$60$	$1$	$1.667\times10^2$	$6.944\times10^{-4}$	$1.901\times10^{-6}$
1 hour	$3600$	$60$	$1$	$4.167\times10^{-2}$	$1.141\times10^{-4}$
1 day	$8.640\times10^4$	$1440$	$24$	$1$	$2.738\times10^{-3}$
1 year	$3.156\times10^7$	$5.259\times10^5$	$8.766\times10^3$	$365.25$	$1$

Table B2 Time

	$\mathbf{m/s}$	$\mathbf{cm/s}$	$\mathbf{ft/s}$	$\mathbf{mi/h}$
1 meter/second	$1$	$10^2$	$3.281$	$2.237$
1 centimeter/second	$10^{-2}$	$1$	$3.281\times10^{-2}$	$2.237\times10^-2$
1 foot/second	$0.3048$	$30.48$	$1$	$0.6818$
1 mile/hour	$0.4470$	$44.70$	$1.467$	$1$

Table B3 Speed

$1~\mathrm{m/s}^2=100~\mathrm{cm/s}^2=3.281~\mathrm{ft/s}^2$

$1~\mathrm{cm/s}^2=0.01~\mathrm{m/s}^2=0.03281~\mathrm{ft/s}^2$

$1~\mathrm{ft/s}^2=0.3048~\mathrm{m/s}^2=30.48~\mathrm{cm/s}^2$

$1~\mathrm{mi/h}\cdot\mathrm{s}=1.467~\mathrm{ft/s}^2$

	$\mathbf{kg}$	$\mathbf{g}$	$\mathbf{slug}$	$\mathbf{u}$
1 kilogram	$1$	$10^3$	$6.852\times10^{-2}$	$6.024\times10^{26}$
1 gram	$10^{-3}$	$1$	$6.852\times10^{-5}$	$6.024\times10^{23}$
1 slug	$14.59$	$1.459\times10^4$	$1$	$8.789\times10^{27}$
1 atomic mass unit	$1.661\times10^{-27}$	1.661\times10^{-24}	$1.138\times10^{-28}$	$1$
1 metric ton	$1000$

Table B4 Mass

Table B5 Force

	$\mathbf{Pa}$	$\mathbf{dyne/cm}^2$	$\mathbf{atm}$	$\mathbf{cmHg}$	$\mathbf{lb/in.}^2$
*Where the acceleration due to gravity is $9.80665~\mathrm{m/s}^2$ and the temperature is $0^{\circ}\mathrm{C}$
1 pascal	$1$	$10$	$9.869\times10^{-6}$	$7.501\times10^{-4}$	$1.450\times10^{-4}$
1 dyne/centimetre²	$10^{-1}$	$1$	$9.869\times10^{-7}$	$7.501\times10^{-5}$	$1.450\times10^{-5}$
1 atmosphere	$1.013\times10^5$	$1.013\times10^6$	$1$	$76$	$14.70$
1 centimetre mercury*	$1.333\times10^3$	$1.333\times10^4$	$1.316\times10^{-2}$	$1$	$0.1934$
1 pound/inch²	$6.895\times10^3$	$6.895\times10^4$	$6.805\times10^{-2}$	$5.171$	$1$
1 bar	$10^5$
1 torr				$1~(\mathrm{mmHg})$

Table B6 Pressure