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Full Precision English Imperial/Metric Converter

Convert between English and Metric units based on the exact U.S. definitions to the full precision of your JavaScript interpreter!
No cgi delay, no slow graphics, no extra fiddling with all kinds of widgets and no cut-off digits like on other converters!

Length

mil point in (inch) hand* li* (link) ft (foot) yd (yard) fath* (fathom) rd (rod, pole, perch) ch* (chain) fur (furlong) mi (mile) nautic mile league µm (micrometer/micron) mm (millimeter) cm (centimeter) dm (decimeter) m (meter) km (kilometer) Astronomical unit (A.U.) light year (l.y.) parsec (pc) Paris line (p.l. ''')  =  mil point in (inch) hand* li* (link) ft (foot) yd (yard) fath* (fathom) rd (rod, pole, perch) ch* (chain) fur (furlong) mi (mile) nautic mile league µm (micrometer/micron) mm (millimeter) cm (centimeter) dm (decimeter) m (meter) km (kilometer) Astronomical unit (A.U.) light year (l.y.) parsec (pc) Paris line (p.l. ''')

Area

in² (square inch) ft² (square foot) yd² (square yard) rd² (square rod) ch² (square chain) acre mi² (square mile,section) township mm² cm² dm² m² are hectare km²  =  in² (square inch) ft² (square foot) yd² (square yard) rd² (square rod) ch² (square chain) acre mi² (square mile,section) township mm² cm² dm² m² are hectare km²

Volume

min (minim) fl dr (fluid dram) tsp* (teaspoon) tbsp* (tablespoon) in³ (cubic inch) fl oz (fluid ounce) gi (gill) cup* pt (liquid pint) pt (dry pint) qt (liquid quart) qt (dry quart) gal (gallon) pk (peck) ft³ (cubic foot) bu (bushel) yd³ (cubic yard) ml (milliliter) cm³ (cubic centimeter) cl (centiliter) l (liter) dm³ (cubic decimeter) m³ (cubic meter)  =  min (minim) fl dr (fluid dram) tsp* (teaspoon) tbsp* (tablespoon) in³ (cubic inch) fl oz (fluid ounce) gi (gill) cup* pt (liquid pint) pt (dry pint) qt (liquid quart) qt (dry quart) gal (gallon) pk (peck) ft³ (cubic foot) bu (bushel) yd³ (cubic yard) ml (milliliter) cm³ (cubic centimeter) cl (centiliter) l (liter) dm³ (cubic decimeter) m³ (cubic meter)

Mass

grain s ap (apoth. scruple) dwt (pennyweight) dr (dram) dr ap (apoth. dram) oz (ounce) oz ap (apoth. ounce) lb ap (apoth. pound) lb (pound) slug short hundredweight long hundredweight, gross short ton long ton mg (milligram) g (gram) kg (kilogram) ql* (quintal) t (metric ton)  =  grain s ap (apoth. scruple) dwt (pennyweight) dr (dram) dr ap (apoth. dram) oz (ounce) oz ap (apoth. ounce) lb ap (apoth. pound) lb (pound) slug short hundredweight long hundredweight, gross short ton long ton mg (milligram) g (gram) kg (kilogram) ql* (quintal) t (metric ton)

Force

lb (pound) ton N (Newton)  =  lb (pound) ton N (Newton)

Pressure

psi=lb/in² (lb per square inch) Pa=N/m² (Pascal) kPa=kN/m² (Kilopascal) bar mmHg  =  psi=lb/in² (lb per square inch) Pa=N/m² (Pascal) kPa=kN/m² (Kilopascal) bar mmHg

Energy

in-lb (inch-pound) ft-lb (foot-pound) cal (calorie) J (Joule) kJ (Kilojoule) kWh (Kilowatthour)  =  in-lb (inch-pound) ft-lb (foot-pound) cal (calorie) J (Joule) kJ (Kilojoule) kWh (Kilowatthour)

Power

in-lb/s ft-lb/s cal/s hp (horsepower) W (Watt) kW (Kilowatt)  =  in-lb/s ft-lb/s cal/s hp (horsepower) W (Watt) kW (Kilowatt)

Temperature

°F (degrees Fahrenheit) °C (degrees Celsius) K (Kelvin)  =  °F (degrees Fahrenheit) °C (degrees Celsius) K (Kelvin)

Mileage

mi/gal (miles per gallon) l/100km (liters per 100km)  =  mi/gal (miles per gallon) l/100km (liters per 100km)

Units marked with an asterisk (*) are non-official.

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