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: American converter Mass units of the American customary 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:
Femtogram to Petagram Femtogram to Hectogram Statute Mile to Foot Picogram to Kilogram Yoctogram to Milligram Speed of sound to Meter per hour Decimeter to Meter Ton to Hundredweight Speed of light to Meter per hour Gigagram to Yottagram Quinary (Base 5) to Ternary (Base 3) Decimal (Base 10) to Quaternary (Base 4) Decimeter to Millimeter Ounce to Ton (British) Microgram to Zettagram
Other conversions:
Text to Unicode Text to Unicode for HTML (hexadecimal) Unicode to Unicode for HTML (hexadecimal) Unicode to Unicode for HTML (decimal) Resolution to Megapixel Unicode to Text Text to Unicode for HTML (decimal) Date to Zodiac (Western) Date to Zodiac (Tropical) 