| acre | 0.4047 | ha |
| angstrœm | 1.10-10 | m |
| atmosphere standard | 101.325 | kPa |
| bar | 100.00 | kPa |
| barrel (42 US gal. petroleum) | 159.00 | L |
| Btu, (International Table) | 1.055 | kJ |
| Btu.ft/h.ft2.°F | 1.7296 | W/m.K |
| Btu.in/ ft2.h.°F | 0.14413 | W/m.K |
| Btu.in/s. ft2.°F | 5.189.102 | W/m.K |
| Btu/ ft2.h°F | 5.6745 | W/m2.K |
| Btu/ ft2.s | 1.135.104 | W/m2 |
| Btu/ft2.h | 3.1525 | W/m2 |
| Btu/lb.°F (specific heat, cp) | 4.184.10-3 | kJ/kg.K |
| bushel (UK) | 0.03637 | m3 |
| bushel (US) | 0.03524 | m3 |
| cable lenght | 0.21946 | km |
| cal.g | 4.187.103 | J/kg |
| cal/cm.s.°C | 4.187.102 | W/mK |
| cal/g.°C | 4.187.103 | J/kg.K |
| calorie | 4.187 | kJ |
| candle, candlepower | 1.00 | cd |
| centipoise, dynamic viscosity | 1.00 | mPa.s |
| centistokes, kinematic viscosity | 1.00 | mm2/s |
| circ mil | 5.067.10-10 | m2 |
| ct (cental) | 45.359 | kg |
| cubit | 0.4572 | m |
| cwt (hundredweight) | 50.8023 | kg |
| dram (fl.drm) | 3.552 10-3 | L |
| dram (weight) dr | 1.7718 | g |
| drop | 0.059 10-3 | L |
| fathom | 1.0288 | m |
| footcandle | 10.76 | lx |
| ft | 0.3048 | m |
| ft | 304.80 | mm |
| ft of water | 2.99 | kPa |
| ft.lbf, (torque or moment) | 1.36 | N.m |
| ft.lbf, (work) | 1.36 | J |
| ft.lbf/lb (specific energy) | 2.99 | J/kg |
| ft.lbf/min (power) | 0.0226 | W |
| ft/min, fpm | 0.00508 | m/s |
| ft/s, fps | 0.3048 | m/s |
| ft2 | 0.09290 | m2 |
| ft2/s, kinematic viscosity | 92 900.00 | mm2/s |
| ft3 | 0.02832 | m3 |
| ft3 | 28.32 | L |
| ft3/h, cfh | 7.866 | mL/s |
| ft3/min, cfm | 0.4719 | L/s |
| ft3/s, cfs | 28.32 | L/s |
| gallon (UK) | 4.54609 | L |
| gallon (US) | 3.785 | L |
| gauss | 1.10-4 | T |
| gill | 0.14207 | L |
| gph | 1.05 | mL/s |
| gpm | 0.0631 | L/s |
| gpm/ft2 | 0.6791 | L/(s.m2) |
| gr/gal | 17.10 | g/m3 |
| hand | 0.1016 | m |
| horsepower (550ft.lbf/s) | 0.746 | kW |
| in | 25.4 | mm |
| in of mercury (60°F) | 3.377 | kPa |
| in of water (60°F) | 248.8 | Pa |
| in.lb, (torque or moment) | 113.0 | mN.m |
| in2 | 645.0 | mm2 |
| in3 (section modulus) | 16 400.0 | mm3 |
| in3 (volume) | 16.4 | mL |
| in4 (section moment) | 416 200.0 | mm4 |
| km/h | 0.278 | m/s |
| ksi (kip/in2) | 6.895 | MPa |
| kWh | 3.60 | MJ |
| lbf (force of thrust) | 4.45 | N |
| lbf/(ft2) (dynamic viscosity, µ) | 47 880.0 | mPa.s |
| lbf/ft2 | 47.9 | Pa |
| lbm (mass) | 0.4536 | kg |
| lbm (mass) | 453.6 | g |
| lbm/(ft.h) (dynamic viscosity, µ) | 0.413 | mPa.s |
| lbm/(ft.s) (dynamic viscosity, µ) | 1 490.0 | mPa.s |
| lbm/ft (uniform load) | 1.49 | km/m |
| lbm/ft2 | 4.88 | kg/m2 |
| lbm/ft3 (density, p | 16.0 | kg/m3 |
| lbm/gallon | 120.0 | kg/m3 |
| lbm/h | 0.126 | g/s |
| lbm/min | 0.00756 | kg/s |
| league (nautical) | 5.556 | km |
| line | 2.117 10-3 | m |
| litre | 0.001 | m3 |
| micron (µm) of mercury (60°F) | 133.0 | mPa |
| mil (0.001 in.) | 25.4 | µm |
| mile | 1.609 | km |
| mile (nautical) | 1.852 | km |
| millibar | 0.100 | kPa |
| mm of mercury (60°F) | 0.133 | kPa |
| mm of water (60°F) | 9.80 | Pa |
| mph | 1.61 | km/h |
| mph | 0.447 | m/s |
| ounce (avoirdupoids) per gallon | 7.49 | kg/m3 |
| ounce (force of thrust) | 0.278 | N |
| ounce (liquid US) | 29.6 | mL |
| ounce (liquid) fl.oz | 28.4 | mL |
| ounce (mass, avoirdupoids) | 28.3495 | g |
| peck | 9.09218 | L |
| pint | 0.56826 | L |
| pint (liquid US) | 473.0 | mL |
| ppm (by mass) | 1.00 | mg/kg |
| psi | 6.895 | kPa |
| quad (1015 Btu) | 1.06 | EJ |
| quart (liquid US) | 0.946 | L |
| quart (liquid, qt) | 1.1365 | L |
| rpm | 0.105 | rad/s |
| st (stone) | 6.3503 | kg |
| tablespoon (approx.) | 15.0 | mL |
| teaspoon (approx.) | 5.0 | mL |
| therm (100,000 Btu) | 105.5 | MJ |
| ton, long | 1 016.0469 | kg |
| ton, register (rt) | 2.831685 | m3 |
| ton, shipping | 1.132674 | m3 |
| ton, short (US) | 907.1847 | kg |
| yd | 0.9144 | m |
| yd2 | 0.836 | m2 |
| yd3 | 0.7646 | m3 |
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