Unit Conversion

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Acceleration
• 1 foot per second squared (ft/s2) = 0.3048 metre/second squared (m s-2)
Alcohol
• 1 Degrees proof (uk) (°) = 0.5714 % vol
• 1 Degrees proof (us) (°) = 0.5 % vol
Angle
• 1 Minute (') = 0.01667 degrees (°)
• 1 Revolution (rev) = 360 degrees (°)
• 1 Second (") = 0.0002778 degrees (°)
Area
• 1 acre = 4047 square metre (m2)
• 1 are (a) = 100 square metre (m2)
• 1 hectare (ha) = 10000 square metre (m2)
• 1 perch = 25.29 square metre (m2)
• 1 rood = 1012 square metre (m2)
• 1 square centimetre (cm2) = 0.0001 square metre (m2)
• 1 square foot (sq.ft) = 0.0929 square metre (m2)
• 1 square inch (sq.") = 0.0006452 square metre (m2)
• 1 square kilometre (km2) = 1000000 square metre (m2)
• 1 square mile (sq.M) = 2590000 square metre (m2)
• 1 square yard (sq.yd) = 0.8361 square metre (m2)
Body Mass Index (BMI)
• Body Mass Index = mass (Kg) ÷ height(m)2
Current
• 1 aberampere (aA) = 10 ampere (A)
• 1 Biot (Bi) = 10 ampere (A)
• 1 statampere = 3.33564 x 10-10 ampere (A)
Economy (Fuel)
• 1 kilometres per gallon (us) = 264.2 metres/litre (m L-1)
• 1 kilomtres per gallon (uk) = 354 metres/litre (m L-1)
• 1 kilomtres per litre = 1000 metres/litre (m L-1)
• 1 miles per gallon (us) = 425.1 metres/litre (m L-1)
• 1 miles per gallon (uk) = 0.354 metres/litre (m L-1)
• 1 miles per litre = 1609 metres/litre (m L-1)
Energy
• 1 British Thermal Unit (BTU) = 1055 joule (J)
• 1 Electron Volt (eV) = 1.602E-19 joule (J)
• 1 erg (erg) = 0.0000001 joule (J)
• 1 foot pound force = 1.356 joule (J)
• 1 gram calorie = 4.184
• 1 therm = 105500000 joule (J)
• 1 watt hour (W h) = 3600 joule (J)
Force
• 1 dyne = 0.00001 Newton (N)
• 1 gram force = 0.009807 newton (N)
• 1 pound force = 4.448 newton (N)
• 1 ton-force (uk) = 9964 newton (N)
• 1 tonne-force = 9609 Newton (N)
Length Imperial
• 1 Angstrom (A) = 0.0000000001 metre (m)
• 1 atronomical unit (au) = 149600000000 metre (m)
• 1 barleycorn = 0.008467 metre (m)
• 1 cable (land) = 185.2 metre (m)
• 1 cable (long) = 219.5 metre (m)
• 1 cable (naut) = 182.9 metre (m)
• 1 cable (rn) = 185.3 metre (m)
• 1 chain = 20.12 metre (m)
• 1 cubit = 0.4572 metre (m)
• 1 degree (°) = 111100 metre (m)
• 1 digit = 0.01905 metre (m)
• 1 ell = 1.143 metre (m)
• 1 fathom = 1.829 metre (m)
• 1 finger = 0.02223 metre (m)
• 1 foot (ft) = 0.3048 metre (m)
• 1 furlong = 201.2 metre (m)
• 1 hand = 0.1016 metre (m)
• 1 inch (") = 0.0254 metre (m)
• 1 league (land) = 4828 metre (m)
• 1 league (naut) (uk) = 5560 metre (m)
• 1 lightyear = 9461000000000000 metre (m)
• 1 link = 0.2012 metre (m)
• 1 micron (µ) = 0.000001 metre (m)
• 1 mil = 0.0000254 metre (m)
• 1 mile (M) = 1609 metre (m)
• 1 mile (naut) (international) (n M) = 1852 metre (m)
• 1 mile (naut) (uk) (n M) = 1853 metre (m)
• 1 nail = 0.05715 metre (m)
• 1 pace (geometrical) = 1.524 metre (m)
• 1 pace (military) = 0.762 metre (m)
• 1 palm = 0.9144 metre (m)
• 1 parsec = 30860000000000000 metre (m)
• 1 perch = 5.029 metre (m)
• 1 pole = 5.029 metre (m)
• 1 rod = 5.029 metre (m)
• 1 rope = 6.096 metre (m)
• 1 shackle = 22.86 metre (m)
• 1 shaftment = 0.1524 metre (m)
• 1 span = 0.2286 metre (m)
• 1 thou = 0.0000254 metre (m)
• 1 vigrate = 5.029 metre (m)
• 1 yard (yd) = 0.9144 metre (m)
Mass
• 1 atomic mass unit (amu) = 1.661E-24 gram (g)
• 1 carat (uk) (ct) = 0.2592 gram (g)
• 1 carat (metric) (ct) = 0.2 gram (g)
• 1 cental = 45360 gram (g)
• 1 clove = 3175 gram (g)
• 1 dram (av) = 1.772 gram (g)
• 1 dram (ap) = 3.888 gram (g)
• 1 dram (tr) = 3.888 gram (g)
• 1 grain = 0.0648 gram (g)
• 1 Grain (ap) (gr) = 0.0648 gram (g)
• 1 grain (tower) (gr) = 0.04556 gram (g)
• 1 grain (tr) (gr) = 0.0648 gram (g)
• 1 hundredweight (hwt) = 50800 gram (g)
• 1 hundredweight (short) (hwt) = 45360 gram (g)
• 1 mark (tower) = 233.3 gram (g)
• 1 ounce (oz) = 28.35 gram (g)
• 1 ounce (ap) (oz) = 31.1 gram (g)
• 1 ounce (av) (oz) = 28.35 gram (g)
• 1 ounce (Tower) (oz) = 29.16 gram (g)
• 1 ounce (tr) (oz) = 31.1 gram (g)
• 1 pennyweight (dwt) = 1.555 gram (g)
• 1 pennyweight (tower) (dwt) = 1.458 gram (g)
• 1 pound (ap) (lb) = 373.2 gram (g)
• 1 pound (av) (lb) = 453.6 gram (g)
• 1 pound (Tower) (lb) = 349.9 gram (g)
• 1 pound (tr) = 373.2 gram (g)
• 1 quarter (uk) = 12700 gram (g)
• 1 quarter (us) = 11340 gram (g)
• 1 sack = 165100 gram (g)
• 1 scruple (ap) (s) = 1296 gram (g)
• 1 slug = 14590 gram (g)
• 1 stone (st) = 6350 gram (g)
• 1 tod = 12700 gram (g)
• 1 ton (t) = 1016000 gram (g)
• 1 ton (us) (t) = 907200 gram (g)
• 1 tonne = 1000000 gram (g)
Memory
• 1 bit (b) = 0.125 byte (B)
• 1 gigaByte (GB) = 1074000000 (B)
• 1 kiloByte (kB) = 1024 byte (B)
• 1 megaBit (Mb) = 131100 byte (B)
• 1 megaByte (MB) = 1049000 byte (B)
• 1 nibble (n) = 0.5 byte (B)
• 1 petaByte (PB) = 1126000000000000 byte (B)
• 1 terraByte (TB) = 1100000000000 byte (B)
Number
• 1 brace = 2
• 1 dozen (doz) = 12
• 1 bakers dozen = 13
• 1 score = 20
• 1 gross = 144
• 1 centuary = 100
• 1 grand = 1000
• 1 quire (paper) = 24 sheets
• 1 ream (paper) = 500 sheets
• 1 mole (chemistry) (mol) = 6.023 x 1023
Power
• 1 horsepower (hp) = 745.6999 watt (W)
Pressure
• 1 Inch of water (in.h2o) = 249.1 pascal (Pa)
• 1 millimetre of mercury (mm Hg) = 133.3 pascal (Pa)
• 1 bar = 100000 pascal (Pa)
• 1 torr = 133.3 pascal (Pa)
• 1 atmosphere (at) = 101300 pascal (Pa)
• 1 kilogram force per square centimetre = 98070 pascal (Pa)
• 1 pounds per square inch (psi) = 6895 pascal (Pa)
• 1 Rutherforrd (Ruth) = 0.000001 becquerel (Bq)
Salary (Wages)
Approximate figures, ignoring Tax etc. and assuming
8 hour day, 5 day week, 12 month year, 52 week year
• £1 per hour = £8.00 per day
• £1 per hour = £40.00 per week
• £1 per hour = £173.33 per month
• £1 per hour = £2080.00 per year
• £1 per day = £0.125 per hour
• £1 per day = £5.00 per week
• £1 per day = £21.67 per month
• £1 per day = £260.00 per year
• £1 per week = £0.025 per hour
• £1 per week = £0.20 per day
• £1 per week = £4.33 per month
• £1 per week = £52.00 per year
• £1 per month = £0.00577 per hour
• £1 per month = £0.04615 per day
• £1 per month = £0.23077 per week
• £1 per month = £12 per year
• £1 per year = £0.00048 per hour
• £1 per year = £0.00385 per day
• £1 per year = £0.01923 per week
• £1 per year = £0.08333 per month
Temperature
 Celcius Farenheit Kelvin Celcius °C ( F - 32 ) ÷ 1.8 K + 273.15 Farenheit ( °C x 1.8 ) + 32 F ( ( K - 273.15 ) x 1.8 ) + 32 Kelvin °C + 273.15 ( ( F - 32 ) ÷ 1.8) + 273.15 K Centigrade (historic) 100 - °C 100 - ( ( F - 32 ) ÷ 1.8 ) 173.15 - K Note Celcius temperature readings are often mislabelled as Centigrade Freezer *** below -18 below 0 below 255 Freezer ** below -12 below 10 below 261 Freezer * below -6 below 21 below 267 Fridge below 4 below 39 below 277 Gas mark¼ (uk) 107 225 380 Gas mark½ (uk) 121 250 394 Gas mark1 (uk) 135 275 408 Gas mark2 (uk) 148 300 421 Gas mark3 (uk) 162 325 435 Gas mark4 (uk) 176 350 449 Gas mark5 (uk) 190 375 463 Gas mark6 (uk) 204 400 477 Gas mark7 (uk) 218 425 491 Gas mark8 (uk) 232 450 505 Gas mark9 (uk) 246 475 519 Gas mark10 (uk) 260 500 533

Time
• 1 centuary(average) (cent) = 3154000000 second (s)
• 1 day (dy) = 86400 second (s)
• 1 decade(average) (dec) = 315400000 second (s)
• 1 fortnight (fn) = 1210000 second (s)
• 1 hour (hr) = 3600 second (s)
• 1 millennium(average) (mill) = 31540000000 second (s)
• 1 Minute (min) = 60 second (s)
• 1 month(average) (mo) = 2628000 second (s)
• 1 week (wk) = 604800 second (s)
• 1 year(average) (yr) = 31540000 second (s)
Velocity
• 1 foot/second (ft/s) = 0.3048 meter/second (m s-1)
• 1 kilometre/hour (kph) = 0.2778 meter/second (m s-1)
• 1 Knot (nautical)(kn) = 0.5144 meter/second (m s-1)
• 1 knot (uk)(kn) = 0.5148 meter/second (m s-1)
• 1 light speed (c) = 299800000 meter/second (m s-1)
• 1 mile/hour (mph) = 0.447 meter/second (m s-1)
• 1 mach (sound-speed)(air) = 343 meter/second (m s-1)
Volume
• 1 anker (brew) = 37.85 litre (L)
• 1 bag = 0.1091 litre (L)
• 1 barrel (uk) = 163.7 litre (L)
• 1 barrel (brew) = 160.4 litre (L)
• 1 barrel (oil) = 0.159 litre (L)
• 1 Barrel (wine) = 0.1432 litre (L)
• 1 barrel(wine) = 119.2 litre (L)
• 1 bottle (brew) = 0.75 litre (L)
• 1 bushel (uk) = 36.37 litre (L)
• 1 butt = 491 litre (L)
• 1 butt (126) = 0.5728 litre (L)
• 1 butt (brew) = 481.2 litre (L)
• 1 chalfton (uk) = 1.309 litre (L)
• 1 coomb (dry) = 145.5 litre (L)
• 1 cran = 170.5 litre (L)
• 1 cubic centimetre = 0.000001 litre (L)
• 1 cubic foot = 2.832 litre (L)
• 1 cubic inch = 0.01639 litre (L)
• 1 cubic yard = 764.6 litre (L)
• 1 cup (uk) = 0.0002841 litre (L)
• 1 drachm = 0.0004262 litre (L)
• 1 drop (ap) = 0.0000059 litre (L)
• 1 firkin = 40.91 litre (L)
• 1 firkin (brew) = 40.1 litre (L)
• 1 fluid drachms = 0.000003552 litre (L)
• 1 fluid ounce (fl.oz) = 0.02841 litre (L)
• 1 fluid scruple = 0.001515 litre (L)
• 1 gallon (uk) (g) = 4.546 litre (L)
• 1 gallon (us) = 3.788 litre (L)
• 1 gill = 0.1421 litre (L)
• 1 gill (uk) = 0.0001421 litre (L)
• 1 gill (uk) = 0.1421 litre (L)
• 1 hogshead = 245.5 litre (L)
• 1 hogshead (brew) = 240.6 litre (L)
• 1 hogshead (uk) = 245.5 litre (L)
• 1 kenning = 18.18 litre (L)
• 1 kenning (dry) = 18.18 litre (L)
• 1 kilderkin = 81.83 litre (L)
• 1 magnum (brew) = 1.5 litre (L)
• 1 methuslah (brew) = 6 litre (L)
• 1 minim (ap) = 0.000005919 litre (L)
• 1 minim (us) = 0.000006161 litre (L)
• 1 peck (us) = 8.81 litre (L)
• 1 peck (dry) = 9.092 litre (L)
• 1 pin = 20.46 litre (L)
• 1 pint (pt) = 0.5683 litre (L)
• 1 pint (uk) = 0.5683 litre (L)
• 1 pint (us) = 0.4736 litre (L)
• 1 pipe (wine) = 477 litre (L)
• 1 pottle (liquid) = 1.893 litre (L)
• 1 pottle (dry) = 2.273 litre (L)
• 1 quart (us) = 0.9464 litre (L)
• 1 quart (uk) = 1.137 litre (L)
• 1 rundlet(wine) = 68.14 litre (L)
• 1 stere = 1000 litre (L)
• 1 strike = 72.74 litre (L)
• 1 tablespoon (uk) = 0.00001776 litre (L)
• 1 teaspon (uk) = 0.000005919 litre (L)
• 1 tierce (wine) = 159 litre (L)
• 1 tun (wine) = 953.9 litre (L)
SI Prefix
 Prefix Abbr Meaning vectra V x 1027 yotta Y x 1024 zetta Z x 1021 exa E x 1018 peta P x 1015 tera T x 1012 giga G x 109 mega M x 106 myria my x 10000 x 104 kilo k x 1000 x 103 hecto h x 100 x 102 deca da x 10 x 101 1 x 100 deci d x 0.1 x 10-1 centi c x 0.01 x 10-2 milli m x 0.001 x 10-3 micro µ x 10-6 nano n x 10-9 pico p x 10-12 femto f x 10-15 atto a x 10-18 zepto z x 10-21 yocto y x 10-24 vimto v x 10-27
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