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:
Teragram to Picogram Grad to Minute of arc Grain to Quarter (British) Exagram to Femtogram Speed of sound to Speed of light Foot per hour to Mile per hour Gram to Kilogram Grad to Point Binary (Base 2) to Hexadecimal (Base 16) Rømer to Rankine Hexadecimal (Base 16) to Binary (Base 2) Kilometer per hour to Mile per second Gigagram to Picogram Picogram to Gigagram Dram to Troy Ounce
Other conversions:
Unicode to Unicode for HTML (hexadecimal) Date to Zodiac (Western) Date to Zodiac (Tropical) Text to Unicode for HTML (hexadecimal) Text to Unicode Unicode to Unicode for HTML (decimal) Text to Unicode for HTML (decimal) Resolution to Megapixel Unicode to Text 