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:
Fahrenheit to Celsius Point to Second of arc Stone to Ounce Terabyte to Gigabyte Hectogram to Megagram (Tonne) Decagram to Yoctogram Gram to Nanogram Quaternary (Base 4) to Octal (Base 8) Binary (Base 2) to Decimal (Base 10) Gram to Troy Ounce Kilogram to Exagram Megabyte to Terabyte Quinary (Base 5) to Quaternary (Base 4) Yard to Kilometer Megabyte to Gigabyte
Other conversions:
Text to Unicode for HTML (hexadecimal) Resolution to Megapixel Unicode to Unicode for HTML (decimal) Unicode to Unicode for HTML (hexadecimal) Text to Unicode Text to Unicode for HTML (decimal) Date to Zodiac (Tropical) Unicode to Text Date to Zodiac (Western) 