Physical quantityUnit name | Symbol | SI conversion | Definition |
Length unitsinch | in | 2,54 cm | [≡ 1/36 yd] | foot | ft | 30,48 cm | [≡ 12 in] | yard | yd | 0,9144 m | [≡ 3 ft] | mile | mi | 1609,34 m | [≡ 5280 ft] | nautic mile | nm; NM | 1852 m | [≡ 6080 ft] | league | lea | 4828,03 m | [≡ 3 mi] |
Area unitsare | a | 100 m2 | [≡ 100 m2] | acre | ac | 4046,86 m2 | [≡ 4840 sq yd] | hectare | ha | 10000 m2 | [≡ 10000 m2] |
Volume unitstablespoon | tbsp | 15 mL | [≡ 15 mL] | pint | pt | 0,568 L | [≡ 1/8 gal] | gallon | gal | 4,546 L | [≡ 4,546 L] |
Speed unitsmile per hour | mph | 0,447 m/s | [≡ 1 mi/h] | knot | kn | 0,514 m/s | [≡ 1 NM/h] |
Dynamic viscosity unitspoise | P | 10-1 Pa·s | [≡ 1 barye·s] |
| | Mass unitscarat | kt | 200 mg | [≡ 200 mg] | ounce (avoirdupois) | oz av | 28,35 g | [≡ 1/16 lb] | pound (avoirdupois) | lb av | 0,45 kg | [≡ 7000 grains] |
Force unitsdyne | dyn | 10-5 N | [≡ 1 g·cm/s2] | kilogram-force | kgf; kp | 9,81 N | [≡ 1 kg x g] |
Pressure unitstorr | torr | 133,32 Pa | [≡ 101325/760 Pa] | millimeter of mercury | mmHg | 133,32 Pa | [≡ ...] | pound per square inch | psi | 6,894 x 103 Pa | [≡ 1 lbf/in2] |
Energy unitserg | erg | 10-7 J | [≡ 1 g⋅cm/s2] | British thermal unit | BTU | 1,055 kJ | [≡ ...] | ton of TNT | tTNT | 4,184 GJ | [≡ 1 Gcal] |
Power unitshorsepower | hp | 735,5 W | [≡ 75 m·kgf/s] |
Temperature unitskelvin | K | T[K] = T[°C] + 273,15 | degree Celsius | °C | T[°C] = T[K] - 273,15 | degree Rankine | °R; °Ra | T[°R] = 9/5 x T[K] | degree Fahrenheit | °F | T[°F] = 9/5 x T[°C] + 32 |
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