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:
Attogram to Nanogram Kilogram to Picogram Meter per hour to Meter per second Gram to Pound Minute of arc to Degree Yottagram to Exagram Decigram to Exagram Quinary (Base 5) to Quaternary (Base 4) Kilometer to Millimeter Megagram (Tonne) to Petagram Newton to Delisle Hexadecimal (Base 16) to Duodecimal (Base 12) Kilogram to Exagram Gram to Ton (British) Minute of arc to Second of arc
Other conversions:
Text to Unicode for HTML (decimal) Unicode to Text Date to Zodiac (Tropical) Text to Unicode Unicode to Unicode for HTML (decimal) Text to Unicode for HTML (hexadecimal) Date to Zodiac (Western) Resolution to Megapixel Unicode to Unicode for HTML (hexadecimal) 