Untitled

(?i)\b\d+(\.\d+)?\s*
(?:
    meters?|metres?|km|kms?|cm|cms?|mm|mms?|in|ft|yd|mi|nmi|
    g|kg|lbs?|oz|t|t?onnes?|
    L|l|ml|gal|qt|pt|fl\s*oz|
    s|sec|secs?|min|mins?|h|hr|hrs?|d|wk|wks?|mo|mos?|y|yr|yrs?|
    b|bit|bits?|B|byte|bytes?|kb|kilobit|kilobits|kB|kilobyte|kilobytes|Mb|megabit|megabits|MB|megabyte|megabytes|Gb|gigabit|gigabits|GB|gigabyte|gigabytes|Tb|terabit|terabits|TB|terabyte|terabytes|
    A|amp|amps?|V|volt|volts?|ohm|ohms?|W|watt|watts?|kW|kilowatt|kilowatts?|J|joule|joules?|N|newton|newtons?|Pa|pascal|pascals?|Hz|hertz|kHz|kilohertz|MHz|megahertz|
    C|°C|°F|K|°K|°Cels|°Fahr|°Kelv|°Kelvs|°Celsius|°Fahrenheit|°Kelvin
)
\b