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:
Celsius to Kelvin Femtogram to Milligram Kilometer to Meter Duotrigesimal (Base 32) to Quaternary (Base 4) Kilogram to Yottagram Meter per second to Foot per hour Zettagram to Picogram Ternary (Base 3) to Decimal (Base 10) Second of arc to Grad Mile per hour to Kilometer per second Teragram to Zeptogram Gigabyte to Bit Unicode to Unicode for HTML (decimal) Exagram to Hectogram Petagram to Nanogram
Other conversions:
Resolution to Megapixel Unicode to Unicode for HTML (hexadecimal) Unicode to Text Text to Unicode for HTML (decimal) Unicode to Unicode for HTML (decimal) Date to Zodiac (Tropical) Date to Zodiac (Western) Text to Unicode for HTML (hexadecimal) Text to Unicode 