Converters:
Computer data  Bytes  Resolution  Color code  Unicode
Length  Basic  Metric
Mass  Basic  Metric  American  British
Math  Positional notation  Angle  Numeral system
Speed  Basic
Temperature  Basic  Advanced
Time / date  Basic  Zodiac sign

Mass / weight units. Mass: American converter Mass units of the American customary system. All mass converters Basic mass converter (Dram, Grain, Gram, Hundredweight (British), Hundredweight (US), Ounce, Pound , Quarter (British), Quarter (US), Ton (British), Ton (US), Troy Ounce)  Metric mass converter (Yoctogram, Zeptogram, Attogram, Femtogram, Picogram, Nanogram, Microgram, Milligram, Centigram, Decigram, Gram, Decagram, Hectogram, Kilogram, Megagram (Tonne), Gigagram, Teragram, Petagram, Exagram, Zettagram, Yottagram)  American mass converter (Grain, Dram, Ounce, Pound, Quarter, Hundredweight, Ton)  British mass converter (Dram, Ounce, Pound, Stone, Quarter, Hundredweight, Ton) 
Mass fun fact The earth weighs approximately 5.9736 x 10^{24}kg (so that is 5,973,600,000,000,000,000,000,000).  source: NASA 

Common conversions:
Knot to Meter per second Grain to Gram Duotrigesimal (Base 32) to Quaternary (Base 4) Knot to Mile per hour Celsius to Fahrenheit Gram to Yottagram Decigram to Gram Duodecimal (Base 12) to Vigesimal (Base 20) Decimal (Base 10) to Octal (Base 8) Decagram to Gram Ounce to Stone Meter per hour to Meter per second Troy Ounce to Quarter (British) Yoctogram to Exagram Stone to Dram
Other conversions:
Text to Unicode Date to Zodiac (Tropical) Unicode to Unicode for HTML (hexadecimal) Text to Unicode for HTML (hexadecimal) Date to Zodiac (Western) Resolution to Megapixel Unicode to Unicode for HTML (decimal) Unicode to Text Text to Unicode for HTML (decimal) 