Units Converter


Change any value for instant conversion to other units within same group.

Length:

millimetres(mm) = inches(") = feet, / inches
metres(m) = feet(') = yards
kilometres(km) = miles(mi) = light years
microns(µm) = nanometres(nm) = Planck lengths

Area:

square cm(cm²) = square inches(inch²) = square feet(ft²)
square metres(m²) = hectares(ha) = acres
square km(km²) = square miles(mi²) = football pitches

Weight:

grammes(g) = ounces(oz) = tonnes(t)
kilogram(kg) = pounds(lb) = stone

Temperature:

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

Number Types:

decimal(n10) = hexadecimal(n16) = octal(n8)
Roman =  binary(n2)

Volume:

cubic cm(cc/ml) = cubic inches(inch³) = cubic feet(ft³)
litres(l) = pints(UK) = gallons(UK)
cubic metres(m³) = pints(US) = gallons(US)

Pressure:

millibars(mb) = inches Hg = altitude(metres)
bar = kilopascals(kPa) = psi

Angle:

degrees(°) = radians(rad) =
V
cardinal direction
revolutions = % gradient = 1 in gradient

Fuel Usage:

litres/100km = miles/gallon(UK) = miles/gallon(US)

Power:

watts(W) = kilowatts(kW) = horsepower(hp)

Energy:

kilowatt hours(kWh) = Thermal Units (BTU) = kilocalories

Speed:

metres/sec(m/s) = km/hour(kph) = miles/hour(mph)
millimetres/sec = metres/minute = %light speed(%c)

Notes:

Large/small numbers represented by powers of 10 in "e±XX" format, e.g. 51.8e+06 = 51.8 x 106 = 51.8 mega. List of multipliers shown to right. Note, hexadecimal numbers use letters a,b,c,d,e,f for some digit values. e+03_103___kilo__thousand
e+06_106___mega__million
e+09_109___giga__billion
e+12_1012__tera__trillion
e+15_1015__peta__quadrillion
e+18_1018___exa__quintillion
e+21_1021_zetta__sextillion
e+24_1024_yotta__septillion
e-03_10-3__milli__thousandth
e-06_10-6__micro__millionth
e-09_10-9___nano__billionth
e-12_10-12__pico__trillionth
e-15_10-15_femto__quadrillionth
e-18_10-18__atto__quintillionth
e-21_10-21_zepto__sextillionth
e-24_10-24_yocto__septillionth
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