| symbol | quantity | english engineering dimensions | force-length-time dimensions | mass-length-time dimensions |
| A | area | ft2 | L2 | L2 |
| a | wave velocity | ft/sec (fps) | L/T | L/T |
| a | linear acceleration | ft/sec2 | L/T2 | L/T2 |
| B | bottom width (open channel) | ft | L | L |
| b | surface width (open channel) | ft | L | L |
| b | span of airfoil | ft | L | L |
| C | chezy coefficient | ft½/sec | L½/T | L½/T |
| cp | specific heat at constant pressure | ft-lb/lb°R | ||
| cv | specific heat at constant volume | ft-lb/lb°R | ||
| D | drag force | lb | F | ML/T2 |
| d | diameter | ft | L | L |
| E | modulus of elasticity | lb/ft2 | F/L2 | M/LT2 |
| E | unit energy | ft-lb/lb | L | L |
| e | size of roughness | ft | L | L |
| F | force | lb | F | ML/T2 |
| G | weight flowrate | lb/sec | F/T | ML/T3 |
| g | gravitational acceleration | ft/sec2 | L/T2 | L/T2 |
| H | total head | ft | L | L |
| H | head on weir | ft | L | L |
| H | enthalpy | ft-lb/lb | L | L |
| h | head or height | ft | L | L |
| I | moment of inertia | ft4 | L4 | L4 |
| I | internal energy | ft-lb/lb | L | L |
| K | coefficient of permeability | ft/sec (fps) | L/T | L/T |
| L | lift force | lb | F | ML/T2 |
| l | length | ft | L | L |
| M | mass | slugs | FT2/L | M |
| M | moment | ft-lb | FL | ML2/T2 |
| n | manning's roughness coefficient | ft1/6 | L1/6 | L1/6 |
| P | power | ft-lb/sec | FL/T | ML2/T3 |
| P | perimeter | ft | L | L |
| P | weir height | ft | L | L |
| p | pressure | lb/ft2 (psf) | F/L2 | M/LT2 |
| O | flowrate | ft3/sec (cfs) | L3/T | L3/T |
| q | two-dimensional flowrate | ft2/sec (cfs/ft) | L2/T | L2/T |
| R | radius | ft | L | L |
| R | engineering gas constant | ft-lb/lb°R | ||
| Rh | hydraulic radius | ft | L | L |
| r | radial distance | ft | L | L |
| T | torque | ft-lb | FL | ML2/T2 |
| T | absolute temperature | °R | ||
| t | temperature | °F | ||
| t | time | sec | T | T |
| u | velocity | ft/sec (fps) | L/T | L/T |
| V | velocity | ft/sec (fps) | L/T | L/T |
| V | volume | ft3 (cuft) | L3 | L3 |
| v | velocity | ft/sec (fps) | L/T | L/T |
| W | weight | lb | F | ML/T2 |
| w | velocity | ft/sec (fps) | L/T | L/T |
| y | depth (open channel) | ft | L | L |
| y | distance from solid boundary | ft | L | L |
| z | height above datum | ft | L | L |
| Γ | circulation | ft2/sec | L2/T | L2/T |
| γ | specific weight | lb/ft3 | F/L3 | M/L2T2 |
| δ | boundary layer or film thickness | ft | L | L |
| ε | eddy viscosity | lb-sec/ft2 | FT/L2 | M/LT |
| μ | viscosity | lb-sec/ft2 | FT/L2 | M/LT |
| ν | kinematic viscosity | ft2/sec | L2/T | L2/T |
| ξ | vorticity | sec-1 | 1/T | 1/T |
| ρ | density | slug/ft3 | FT2/L4 | M/L3 |
| σ | surface tension | lb/ft | F/L | M/T2 |
| τ | shear stress | lb/ft2 | F/L2 | M/LT2 |
| φ | velocity potential | ft2/sec | L2/T | L2/T |
| ψ | streamfunction | ft2/sec | L2/T | L2/T |
| ω | angular velocity | sec-1 | 1/T | 1/T |
| symbol | quantity | symbol | quantity |
| C | cauchy number | n | polytropic exponent |
| Cc | coefficient of contraction | R | reynolds number |
| CD | drag coefficient | S | slope of energy line |
| Cf | frictional drag coefficient | So | bottom slope (open channel) |
| CL | lift coefficient | Sc | critical slope |
| Cp | pressure coefficient | W | weber number |
| Cv | coefficient of velocity | Y | expansion factor |
| Cw | weir coefficient | α | kinetic energy |
| E | euler number |
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| F | froude number | β | momentum correction factor |
| f | friction factor | η | efficiency |
| KL | loss coefficient | κ | von kármán's turbulence |
| k | adiabatic exponent |
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| M | mach number | Π | dimensionless group |
| tem- pera- ture, °F | specific weight,a γ, lb/ft3 | density,a ρ, slug/ft3 | modulusb of elasticity,c E/103, psi | viscosity,a μ × 105, lb-sec/ft2 | kinematic viscosity,a υ x 105, ft2/sec | surfacea tension,d σ, lb/ft | kinematic surfacea tension,d σ/ρ, ft³/sec² | vapor pressure,e pv , psia | vapor pressure head,f pv/γ, ft |
| 32 | 62.42 | 1.940 | 287 | 3.746 | 1.931 | 0.00518 | 0.00267 | 0.09 | 0.19 |
| 40 | 62.43 | 19.40 | 296 | 3.229 | 1.664 | 0.00514 | 0.00265 | 0.12 | 0.28 |
| 50 | 62.41 | 1.940 | 305 | 2.735 | 1.410 | 0.00509 | 0.00262 | 0.18 | 0.41 |
| 60 | 62.37 | 1.938 | 313 | 2.359 | 1.217 | 0.00504 | 0.00260 | 0.26 | 0.59 |
| 70 | 62.30 | 1.936 | 319 | 2.050 | 1.059 | 0.00498 | 0.00257 | 0.36 | 0.84 |
| 80 | 62.22 | 1.934 | 324 | 1.799 | 0.930 | 0.00492 | 0.00254 | 0.51 | 1.17 |
| 80 | 62.11 | 1.931 | 328 | 1.595 | 0.826 | 0.00486 | 0.00251 | 0.70 | 1.62 |
| 100 | 62.00 | 1.927 | 331 | 1.424 | 0.739 | 0.00480 | 0.00249 | 0.95 | 2.21 |
| 110 | 61.86 | 1.923 | 332 | 1.284 | 0.667 | 0.00473 | 0.00246 | 1.27 | 2.97 |
| 120 | 61.71 | 1.918 | 332 | 1.167 | 0.609 | 0.00467 | 0.00243 | 1.69 | 3.95 |
| 130 | 61.55 | 1.913 | 331 | 1.069 | 0.558 | 0.00460 | 0.00240 | 2.22 | 5.20 |
| 140 | 61.38 | 1.908 | 330 | 0.981 | 0.514 | 0.00454 | 0.00238 | 2.89 | 6.77 |
| 150 | 61.20 | 1.902 | 328 | 0.905 | 0.476 | 0.00447 | 0.00235 | 3.72 | 8.75 |
| 160 | 61.00 | 1.896 | 326 | 0.838 | 0.442 | 0.00441 | 0.00232 | 4.74 | 11.17 |
| 170 | 60.80 | 1.890 | 322 | 0.780 | 0.413 | 0.00434 | 0.00229 | 5.99 | 14.18 |
| 180 | 60.58 | 1.883 | 318 | 0.726 | 0.385 | 0.00427 | 0.00226 | 7.51 | 17.85 |
| 190 | 60.36 | 1.876 | 313 | 0.678 | 0.362 | 0.00420 | 0.00223 | 9.34 | 22.40 |
| 200 | 60.12 | 1.868 | 308 | 0.637 | 0.341 | 0.00413 | 0.00221 | 11.52 | 27.63 |
| 212 | 59.83 | 1.860 | 300 | 0.593 | 0.319 | 0.00404 | 0.00217 | 14.70 | 35.35 |
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