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:
Decigram to Yoctogram Day to Millisecond Kilometer to Meter Millimeter to Meter Decimal (Base 10) to Quaternary (Base 4) Ternary (Base 3) to Duodecimal (Base 12) Zettagram to Exagram Centigram to Microgram Foot per second to Speed of sound Kilometer to Yard Kilometer per hour to Speed of sound Quarter to Ounce Decagram to Petagram Petagram to Gigagram Decimal (Base 10) to Binary (Base 2)
Other conversions:
Text to Unicode for HTML (hexadecimal) Unicode to Unicode for HTML (hexadecimal) Unicode to Unicode for HTML (decimal) Date to Zodiac (Western) Unicode to Text Date to Zodiac (Tropical) Text to Unicode for HTML (decimal) Resolution to Megapixel Text to Unicode 