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: British converter Mass units of the British adaptation of the Avoirdupois 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:
Duotrigesimal (Base 32) to Decimal (Base 10) Quarter to Hundredweight Kilometer per hour to Meter per second Grain to Quarter (US) Hexadecimal (Base 16) to Vigesimal (Base 20) Réaumur to Kelvin Unicode for HTML (hexadecimal) to Unicode for HTML (decimal) Femtogram to Decigram Decimal (Base 10) to Hexadecimal (Base 16) Gigagram to Exagram Gram to Decigram Unicode for HTML (hexadecimal) to Text Femtogram to Zeptogram Zeptogram to Petagram Ton (US) to Gram
Other conversions:
Text to Unicode for HTML (decimal) Date to Zodiac (Western) Resolution to Megapixel Text to Unicode Text to Unicode for HTML (hexadecimal) Unicode to Unicode for HTML (hexadecimal) Date to Zodiac (Tropical) Unicode to Unicode for HTML (decimal) Unicode to Text 