| Length/Distance | Millimeters, Centimeters, Inches, Feet, Yards, Meters, Kilometers, Miles, Mils, Rods, Fathoms, Nautical Miles, More... |
| Temperature | Celsius, Fahrenheit, Kelvin |
| Speed | centimeters/second, meters/second, kilometers/hour, feet/second, feet/minute, miles/hour, knots, mach, More... |
| Volume | Liquid and Dry. Liters, Fluid Ounces, Pints, Quarts, Gallons, Milliliter/cc, Barrels, Gill, Hogshead, More... |
| Weight | Kilograms, Ounces, Pounds, Troy Pounds, Stones, Tons, More... |
| Metric Weight | microgram, milligram, centigram, decigram, gram, dekagram, hectogram, kilogram, More... |
| Computer | Convert bytes, kilobytes, megabytes, gigabytes, and More... |
| Time | Several different converters and calculators related to time. |
| Cooking | Drop, Dash, Pinch, Teaspoons, Tablespoons, Cups, More... |
| Angles | Gradients, Radians, Degrees, Minutes, Seconds, Points, More... |
| Area | Square centimeter, Square meter, Square inch, Square foot, Square mile, Square Kilometer, Acres, Circles, More... |
| Power | Watts, BTU/hour, foot-lbs/second, Horsepower, kilowatts, More... |
| Energy | Joules, Kilocalories, Foot-poundals, Foot-lbs, Kg force-meters, BTU, Kilowatt-hrs, Horsepower-hrs, More... |
| Density | kg/cubic meter, lbm/cubic foot, lbm/gallon, aluminum, copper, gold, water, More... |
| Force | Dyne, gram-force, poundals, newtons, pounds, kgm-force, More... |
| Pressure | dyne/sq cm, Pascal, poundal/sq foot, Torr, inch H2O, inch mercury, More... |
| Astronomical | Astronomical unit, light-years, parsecs, More... |
| Numbers/Base | Binary, Ternary, Quintal, Octal, Decimal, Hexadecimal |
| Finance | Several calculators and conversions related to finance |
| Miscellaneous | Several calculators and conversions that didn't fit any other category |
| Fun Stuff | Several fun and interesting calculators and conversions |
| Clothing | Convert clothing sizes between many different countries. |
| Light | Conversion calculators for illuminance and luminance. |
| Torque | Pound-force Foot, Pound-force Inch, Kilogram-force Meter, and Newton meter² |
| Viscosity | Poise, Centipoise, Water, Oil, Glycerin, more... |
| Frequency | Hertz, cycles per second, revolutions per second, degrees per second, radians per second, many more... |