# Formula Symbols - W

Written by Jerry Ratzlaff on . Posted in Nomenclature & Symbols for Engineering, Mathematics, and Science

## Formula Symbols

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## W

SymbolGreek SymbolDefinitionUSMetricValue
$$W$$ - Wahl correction factor - -  -
$$f$$ - Wallis parameter dimensionless dimensionless  -
$$w$$ - water content $$in^3 \;or\; ft^3$$ $$mm^3 \;or\; m^3$$ -
$$Q_w$$ - water flow rate $$ft^3 \;/\; sec$$ $$m^3 \;/\; s$$  -
$$q$$ - water flow rate increment $$gpm$$ $$L \;/\; s$$  -
$$WHP$$, $$HP_w$$ - water horsepower $$hp$$ -  -
$$WkW$$ - water kilowatts - $$kW$$  -
$$WS$$ - water surface - -  -
$$v_w$$ - water velocity $$ft\;/\;sec$$ $$m\;/\;s$$  -
$$P$$ - watt $$Watt$$ $$Watt$$  -
$$H$$ - wave height $$ft$$ $$m$$  -
$$\lambda$$ lambda wavelength $$ft$$ $$m$$  -
$$\lambda_l$$ lambda wavelength (longitudinal) constant constant $$2.835967539\;x\;10^{-17}\;m$$
$$\Psi$$ Psi wave function - -  -
$$\sigma^1$$ sigma wave number - -  -
$$\sigma$$ sigma wave vector - -  -
$$\lambda$$ lambda wave velocity $$ft \;/\; sec$$ $$m \;/\; s$$  -
$$A_{web}$$ - web area in a steel beam equal to the depth x web thickness $$in^2 \;or\; ft^2$$ $$mm^2 \;or\; m^2$$  -
$$t_w$$ - web thickness $$in$$ $$mm$$ -
$$We$$ - Weber number dimensionless dimensionless  -
$$G$$, $$\;P$$, $$\;W$$ - weight $$lbf$$ $$N$$  -
$$W_{\rho}$$ rho weight density $$lb\;/\;ft^3$$ $$kg\;/\;m^3$$  -
$$W_a$$ - weight of air - - -
$$W_b$$ - weight of body $$lbf$$ $$N$$  -
$$\gamma$$ gamma weight of fluid $$lbf$$ $$N$$  -
$$W_{im}$$ - weight of immersed body $$lbf$$ $$N$$  -
$$W_s$$ - weight of soil $$lbf$$ $$N$$ -
$$W_s$$ - weight of solid $$lbf$$ $$N$$ -
$$W_w$$ - weight of water $$lbf$$ $$N$$ -
$$\theta_w$$ theda Weinberg angle dimensionless constant dimensionless constant $$0.22290$$
$$Wi$$ - Weissenberg number dimensionless dimensionless  -
$$A$$ - weld current - - -
$$W$$ - weld size $$in$$ $$mm$$  -
$$s$$ - weld speed $$in/min$$ $$mm/min$$ -
$$A_{throat}$$ - weld, area cross the throat of the weld $$in^2 \;or\; ft^2$$ $$mm^2 \;or\; m^2$$  -
$$\rho_{wb}$$ rho wet bulk density of soil $$lb/gal$$ $$g/mL$$ -
$$C_M$$ - wet service factor for wood design - -  -
$$P_w$$ - wetted perimeter $$ft$$ $$m$$  -
$$M$$ - whole number - -  -
$$w$$ - width $$ft$$ $$m$$  -
$$b$$   width, often cross-section $$in \;or\; ft$$ $$mm \;or\; m$$  -
$$b_f$$ - width of the flange of a steel beam cross-section $$in$$ $$mm$$  -
$$b_{entropy}$$ - Wien entropy displacement law constant constant constant $$3.002\;916\;077...\;x\;10^{-3}\;m\;K$$
$$b'$$ - Wien frequency displacement law constant constant constant $$5.878\;925\;757...\;x\;10^{10}\;Hz\;K^{-1}$$
$$b$$ - Wien wavelength displacement law constant constant constant $$2.897\;771\;955...\;x\;10^{-3}\;m\;K$$
$$T_{wc}$$ - wind chill factor $$^\circ F$$ $$C$$ -
$$\alpha$$ alpha Womersley number dimensionless dimensionless  -
$$W$$ - work $$ft-lbf$$ $$J$$  -
$$W$$ - work $$Btu$$ $$kJ$$  -
$$W$$ - work $$HP-hr$$ $$MJ$$  -
$$W$$ - work done on a system $$ft-lbf$$ $$kW$$  -
$$\phi$$ phi work function - -  -
$$W$$ - work per unit mass $$Btu/lbm$$ $$kJ/kg$$  -
Symbol Greek Symbol Definition US Metric Value

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