(ordered by date and popularity)
 
• Mesh Calculate the mesh, or wire diameter/opening, of a sieve or filter.
   
• Fractions This handy calculator can convert fractions to decimal numbers, and decimal numbers to fractions.
   
• Mixing Water Find out the final temperature of a water, steam, or ice solution after mixing together two or more samples.
   
• Radiation A few calculators and converters on radiation and radioactivity.
   
• Surface Speed of a Wheel Calculate the surface speed of a wheel given the radius and RPM.
   
• Objects and Shapes Calculators for working with objects and shapes. Including volume for 3D objects, and area for 2D shapes.
   
• Frequency to Wavelength Calculate the wavelength of any frequency.
   
• Computers and Electronics Various conversions and calculators related to computers and electronics.
   
• Reel Calculator Several calculators for determining the amount of paper or board, the dimensions, or weight of the reel based on the known factors.
   
• Tip Calculator Calculate how much to leave as a tip. Even split the bill between multiple people.
   
• Gauge Various gauge conversions. Wire Gauge, Sheet metal Gauge, and possibly more in the future.
   
• Cholesterol Cholesterol Converter. Convert various cholesterol and glucose units between different standards.
   
• Blood Sugar Blood Sugar Converter. Useful for diabetes patients visiting a different country.
   
• Automotive Several automotive conversions and calculators.
   
• Horse Height Convert Hands to inches, feet, centimeters, and meters.
   
• Grade Point Average Calculate your Grade Point Average.
   
• Room Area Area Calculator. Enter the length and width to calculate the area. Useful for rooms, yards, gardens, anything rectangular in shape.
   
• Nails Many different types of American nails. With technical data and qty/pound calculator. Including common, roofing, finishing, and box.
   
• Brix to Baumé Convert to and from Brix degrees and Baume degrees. Used in syrup, wine, juice, malt, and others.
   
• Typography Convert pica and points to inches or centimeters.
   
• Water Weight Convert a volume of water to weight, and vice versa.
   
• Wind Chill Calculate the wind chill factor
   
• Phone Number Converts a alphanumeric phone number to its numeric equivalent
   
• Airport Calculator Find the degrees, Miles, and Kilometers between two airports
   
• Atmosphere A calculator to help with Atmospheric calculations
   
• Armor A Armor Penetration calculator
   
• BAC Check Calculate your Blood-Alcohol Content
   
• Circle Solver Calculate circle area, diameter, and circumference
   
• Cosine Calculator Enter the adjacent and hypotenuse angles to find the cosine angle
   
• Expression Solver You can solve mathematical expressions using this calculator
   
• Group Work Calculate how long for two people to complete a task
   
• Lap Time Calculates the average lap time required to finish a race in the time you enter
   
• Leap Year Determine if a year is a leap year.
   
• Percent Take the guess work out of percentages
   
• Prime Easily determine if a number is prime or not.
   
• Meeting Room Size Find the approximate room size you'll need depending on your meeting room setup and the number of attendees.
   
• Roman Numerals Converts a numeric year into Roman Numerals.
   
• Advanced Roman Numerals Converts to and from Roman Numerals and whole numbers.
   
• Field Depth Determine the field depth and amount that will be in focus in a photograph
   
• Quaternions A Euler angle and Quaternion conversion calculator
   

See also Fun Stuff