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:
Ton to Stone Nanogram to Yoctogram Duotrigesimal (Base 32) to Decimal (Base 10) Meter to Decameter Vigesimal (Base 20) to Duodecimal (Base 12) Ternary (Base 3) to Duotrigesimal (Base 32) Quarter (US) to Grain Quarter (US) to Ton (British) Millisecond to Minute Stone to Hundredweight Yoctogram to Petagram Milligram to Nanogram Dram to Ton (US) Nautical Mile to Meter Teragram to Nanogram
Other conversions:
Unicode to Unicode for HTML (decimal) Unicode to Text Text to Unicode Date to Zodiac (Western) Date to Zodiac (Tropical) Text to Unicode for HTML (hexadecimal) Unicode to Unicode for HTML (hexadecimal) Resolution to Megapixel Text to Unicode for HTML (decimal) 