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CONVERSION TABLE |
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| Quantity |
Non - SI Unit |
Metric (SI) Unit |
Conversion
Factors (Approximate) |
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Non - SI to Metric |
Metric (SI) to |
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(SI)
Units |
Non - SI Units |
| Length |
Inch
(in) |
millimetre (mm) or centimetre (cm) |
1 in = 25,4 mm |
1 cm = 0,394 in |
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Foot
(ft) |
centimetre (cm) or metre (m) |
1 ft = 30,5 cm |
1 m = 3,28 ft |
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Yard
(yd) |
metre (m) |
1 yd = 0,914 |
1 m = 1,09 yd |
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Mile |
kilometre (km) |
1 mile = 1,61 km |
1 km = 0,62 mile |
| Area |
Square
inch (in²) |
Square
millimetre (mm²) |
1 in² = 645 mm² |
1
mm² = 0,002 in² |
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Square
inch (in²) |
Square centimetre (cm²) |
1 in² = 6,45 cm² |
1 cm² = 0,155 in² |
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Square
foot (ft²) |
Square centimetre (cm²) |
1 ft² = 929 cm² |
1 m² = 10,76 ft² |
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or square metre (m²) |
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Square
yard (yd²) |
Square metre (m²) |
1 yd²
= 0,836 m² |
1 m² = 1,20 yd² |
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Acre |
Hectare (ha) |
1 acre = 0,405 ha |
1 ha = 2,47 acres |
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Square
mile |
Square kilometre (km²) |
1 square mile = 2,59 km² |
1 km² = 0,387 square mile |
| Volume |
Cubic
inch (in³) |
cubic
centimetre (cm³) |
1
in³ = 16,4 cm³ |
1
cm³ = 0,06 in³ |
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Cubic
foot (ft³) |
cubic
decimetre (dm³) |
1 ft³ = 28,3 dm³ |
1 m³ = 35,3 ft³ |
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or cubic metre (m³) |
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Cubic
yard (yd³) |
cubic metre (m³) |
1 yd³ = 0,765 m³ |
1 m³ = 1,31 yd³ |
| Volume |
Fluid
ounce UK (fl oz UK) |
millilitre
(mℓ) |
1
fl. oz (UK) = 28,4 mℓ |
1
mℓ = 0,035 fl. oz (UK) |
| (fluids) |
Pint
UK (pt UK) |
millilitre (mℓ) or litre (ℓ) |
1 pint (UK) = 568 mℓ |
1 ℓ = 1,76 pint (UK) |
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Gallon
UK (gal UK) |
litre (ℓ) or cubic metre (m³) |
1 gallon (UK) = 4,55 ℓ |
1 m³ = 220 gallons (UK) |
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Fluid
ounce US (fl oz US) |
millilitre (mℓ) |
1 fl. oz (US) = 29,6 mℓ |
1 mℓ = 0,034 fl. oz (US) |
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Pint
US (pt US) |
millilitre (mℓ) or litre (ℓ) |
1 pint (US) = 473 mℓ |
1 ℓ = 2,11 pint (US) |
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Gallon
US (gal US) |
litre (ℓ) |
1 galllon (US) = 3,79 ℓ |
1 ℓ = 0,264 gallons (US) |
| Mass |
Ounce
(oz) |
gram
(g) |
1
oz = 28,3 g |
1
g = 0,035 oz |
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Pound
(lb) |
gram (g) or kilogram (kg) |
1 lb = 454 g |
1 kg = 2,20 lb |
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Ton |
tonne (t) |
1 ton = 1,02 tonnr |
1 tonne = 0,984 ton |
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Tael |
gram (g) |
1 tael = 37,8 g |
1 g = 0,026 tael |
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Catty |
kilogram (kg) |
1 catty = 0,605 kg |
1 kg = 1,65 catties |
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Picul |
kilogram (kg) |
1 picul = 60,50 |
1 kg = 0,017 picul |
| Force |
Pound
- force (lbf) |
newton
(N) |
1
lbf = 4,45 N |
1
N = 0,225 lbf |
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Kilogram
force (kgf) |
newton (N) |
1 kgf = 9,81 N |
1 N = 0,102 kgf |
| Pressure |
Pound
force per square inch (psi) |
kilopascal
(kPa) |
1
psi = 6,89 kPa |
1
kPa = 0,145 psi |
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Kilogram
force per |
kilopascal (kPa) |
1 kgf /cm² = 98 kPa |
1 kPa = 0,01 kgf/cm² |
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square
centimetre (kgf/cm²) |
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Inch
of water (in H2O) |
pascal (Pa) |
1 in H2O = 249 Pa |
1 Pa = 0,004 in H2O |
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Bar |
kilopascal (kPa) |
1 bar = 100 kPa |
1 kPa = 0,01 bar |
| Velocity |
Mile
per hour (mph) |
kilometre
per hour (km/h) |
1
mph = 1,61 km/h |
1
km/h = 0,62 mph |
| Temperature |
Fahrenheit
temp (ºF) |
celcius
temp (ºC) |
ºC
= 5 (ºF - 32) / 9 |
ºF
= 9 x ºC / 5 + 32 |
| Density |
Pound
per cubic inch (lb/in) |
gram
per cubic centimetre (g/cm³) |
1
lb/in³ = 27,7 t/m³ |
1
t/m³ = 0,036 lb/in³ |
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=
tonne per cubic metre (t/m³) |
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Pound
per cubic foot (lb/ft³) |
kilogram per cubic metre (kg/m³) |
1 lb/ft³ = 16,02
kg/m³ |
1 kg/m³ = 0,06 lb/ft³ |
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Ton
per cubic yard (ton/yd³) |
tonne per cubic metre (t/m³) |
1 ton/yd³ = 1,33
t/m³ |
1 t/m³ = 0,752 ton/yd³ |
| Energy |
Britisch
termal unit (Btu) |
kilojoule
(kJ) |
1
Btu = 1,06 kJ |
1
kJ = 0,948 Btu |
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Therm |
megajoule (MJ) |
1 therm = 106 MJ |
1 MJ = 9,48 x 10ˉ³ therm |
| Power |
Calorie
(dietician) |
kilojoule
(kJ) |
1
cal (dietician) = 4 kJ |
1
kJ = 0,23 Cal (dietician) |
| Fuel |
Horsepower (hp) |
kilowatt
(kW) |
1
hp = 0,746 kW |
1 kW = 1,34 hp |
| Consumption |
Miles per gallon (mpg) |
litres
per 100 kilometres (ℓ/100 km) |
(n) x mpg = |
(n) x ℓ/100 km
= |
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282
/ (n) ℓ/100 km |
282 / (n) mpg |
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