Logarithm Calcuator
Calculates decimal logs, natural logs, binary logarithms and antilogs (inverse logs) for any number base. A very useful and userfriendly logarithm calculator.

Perpetual Calendar (1901  2099) Very userfriendly. Just click on the year you want displayed.
Perpetual Julian Date Calendar Calculates the Julian Day number and day of the week for dates greater than December 31, 1599.
Traditional Chinese Calendar Years Learn the animal name (ox, tiger, rabbit, etc.) of any year in the traditional Chinese calendar.
May 28, 585 BC This is THE oldest most accurately known date in human history.

Slope, Distance and Equation Calculator This can calculate slope and generate an equaton just from inputting 2 points.

NonMetric "Adding Machine"
Adds Feet & Inches, Pounds & Ounces, Quarts & Cups, Minutes & Seconds, etc.

Cricket Chirps and Temperature
Yes, you can calculate temperature by counting cricket chirps.

Exponential Growth Calculator
Solves for Beginning Amount, Ending Amount, Rate and Time.

Exponential Growth Calculator
Same as above but this is based on natural logs.

Factorial and Derangement Calculator
Do you need to know how many different ways you can arrange the letters ABCD or how many ways you can arrange 1234 in which 1 isn't in first position, 2 isn't second. 3 isn't third and 4 isn't fourth? Then visit this calculator.

Combination Calculator
Do you need to know in how many different ways 'r' elements can be selected from a larger set of 'n'? For example, do you need to know in how many ways can you choose 6 numbers from a set of 40? Then visit this calculator.

Number Base Converter
Directly converts from Base 2 through Base 16.

Prime Factor Calculator
Determines all the prime factors for any number less than ten billion.

Body Mass Index Calculator
This will accept input in kilograms, stones, pounds, meters, feet and inches.

Music Chord Calculator
Click on the key then the chord type and the notes of that chord will be displayed.

Music Chord Chart
Two tables  One has notes of every key and the other lists note numbers of each chord.
Put the two together and you have the notes of a chord.

Basic Calculator
Has the 4 fundamental functions 
Addition, Subtraction, Multiplication, Division and
does exponentiation, square roots, etc.

Video and Film Frame Calculator
Accepts input for 24, 25, 30, 50 and 60 frames per second.
