XL Toolboxes

Acre, alen, ampere, atomic mass unit, angstrom, arpent, atmosphere, numerous multipliers (like nano and kilo), astronomical unit, bar, barrel (petrolium), billion standard cubic feet of gas, board feet, bolt of cloth, british thermal unit, bushel, Celsius, calorie, caliber, calorie( food), Candle, Carat, cubic centimeters, chain, full circle, centimeter, cm-water, cm-mercury, Cord, Electric Charge, centipoise, centistoke, cubit, cup, revolution, darcy, day (mean Earth), degrees, Dram, dyne, earth mass, erg, Electron volt, Fahrenheit, Fraction (like 1/16), electrical capacitance, Fluid ounce, feet, foot-of-water (pressure), Foot-Candle, furlong, gram, gallon (us liquid, us dry, or uk), Magnetic flux density, gnat's eye, hair's-breadth, hand, hectare, electrical inductance, horsepower, hour, Hertz (cycle/second), inch, Any individual item, joule, Kelvin, kilogram, 1000 pound force, kilowatt, liter, pound-force, pound-mass, speed-of-light, Light-Year, Link (Survey), meter, mach (international standard atmosphere/sea level), mile, Micron, minute, mole, megawatt, Newton-force, Ohm, ounce (avoirdupois), Ounce, troy, pascal, military-pace , Parsec, Pint (US liquid, uk, dry us), pound (avoirdupois), pound (troy), pound force per sq in, quart (US liquid, uk, us dry), radian, revolution, rod [survey], Revolution per minute, second, std cu ft (60 F, 14.696 psi), std cu meter (60 F, 101.325 kpa), specific gravity [aluminum], specific gravity [glass], specific gravity [lead], specific gravity [magnesium], specific gravity [steel], span, specific gravity (h2o @ 60 F), tonne (metric), Magnetic flux density, therm, ton (us or short), ton refrigeration (12000 BTU/hr), watt, yard, year (mean Earth) and Many More!

Multipliers, items, special paper, angles, rotation and fractional units can also be combined to enable direct conversions with ease. Mathematical checking through proper use of units is provided. The spreadsheet a blank worksheet to reference your own calculations from and to. You can add your own units and "favorites" are easy to keep for quick access. It has Help information with examples. Email help is also provided. The list of base units are grouped into families and can be searched, sorted and filtered.

Enter "=(1/2*12000*15^2)/30" for the input quantity (1/2 x mass x velocity squared), enter "(ton*knot^2)/min" for the input units and "hp" for the output units (horsepower). Press "convert" and it performs the calculations to yield the correct answer (242 hp or 180 kw).