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*CIE Color Calculator: Converts among most of the CIE color models as well as providing correlated color temperature and standard RGB conversions. *Companding Calculator: Converts among luminance, CIE L*, density and gamma. Includes both a numeric calculator and a graphical display. *Color Difference Calculator: Computes color differences using several different methods (CIE1976, CIE1994, CIE2000, CMC). *Chromatic Adaptation Calculator: Converts colors between reference whites using different chromatic adaptation algorithms. *CIE Spectral Display: Calculates and displays many useful CIE functions, such as the Standard Observers, the Standard Illuminants and blackbody radiators. *Spectral Calculator Spreadsheets: Calculates colorimetry, densitometry and RGB values from your spectral data. *Levels Calculator: See how you lose levels when you pass data through curves. *ColorChecker Calculator: Performs many spectral calculations on the 24 colors of the ColorChecker chart. *ColorChecker RGB Summaries, Spreadsheets and Lab TIFF File: You will find three things on this page, a) summaries of the ColorChecker colors, expressed in each of many standard RGB color spaces, b) spreadsheets that allow you to find which RGB color space is closest to your RGB values, and c) a computer generated Lab TIFF file of the ColorChecker. *Munsell Display Calculator: Displays the Munsell color set (2734 colors) in xyY, Lab and Luv. This is a useful tool for evaluating uniform perceptual color spaces. Also included is an explanation of the infamous "blue turns purple" problem often seen with printer profiles. *Dot Gain Calculator: Performs the standard Murray-Davies dot gain equation to your density measurements. *Dot Gain from Lab or Profile: Two spreadsheets which calculate dot gain from Lab measurements, also allowing you to measure the dot gain of a CMYK ICC printer profile.

I strive to build calculators and content useful for academic and real world applications that are easy to use online.  If you have an idea for a calculator that you would like to have to use online, please let me know. Requests for an online calculator.

Landing page analyzer Answer a series of questions to know how effective is your landing page on industry's best practices. Run tool → Test significance calculator For given number of trials and conversion rate, want to know if the results are statistically significant? Run tool → A/B Ideafox Get ideas for A/B, split and multivariate tests by reading case studies sorted by industry and problem type. Run tool → Test duration calculator Calculate the number of days you will need to run your A/B split test in order to get reliable results. Run tool →

Stakepower is a website value calculator, estimations and information tool. It is a free website where you can calculate your website value, number of daily visitors, website worth, website information and many other information.

Dr Mathis Wackernagel's (developer of the ecological footprint) footprint calculator. "Every semester I have my students calculate their Footprint, change their lifestyle for one week to decrease that Footprint, then compare the results and how it would impact the number of people that could sustainably exist on the planet. Students are shocked when they discover their results. The fact that it is personal and tells them how many planets we would need if everyone on the planet lived as they do drives home the issue better than I ever could in lecture."

» LaTeX Equation Editor : The interactive LaTex equation editor let's you write and download equations in seconds! You can now integrate the sitmo equation editor with iGoogle or your own site. » Online Option Calculators : The largest collection of online exotic option calculators.» Equations :  The Quant Equation Archive is an continously growing collection of the most important equations used in financial engineering.

Monitor color calibration, Monitor color resolution, Create color harmonies, Color delta/comparison math, Color tutorials formulas to calculate color differences. All of them refers to the CIE-L*ab color space.Each formula is written as a "neutral programming function", easy to be translate in any specific computer language.We did not post obvious deltas which involve a simple subtraction of two values.

# Time conversion - convert between Unix timestamp, ISO8601 and RFC 2822 formats # String conversion - encode/decode Base64-encoding; escape XML, URL's and ECMAScript; translate to UTF-8 # Number conversion - convert between decimal, hexadecimal, octal and binary numbers # Network - calculate netmasks, broadcast addresses and do DNS lookups # Bandwidth - calculate the duration of file transfer # XPath debugger - test your XPath expressions

We have good experience in search engine optimization since 2001, Today we provide free Service for all websites, Website Stats and SEO Report for webmasters or anyone owner site in web, our tool analysis provides Page Rank, Website Value Calculator, Website Worth Calculator, IP Address, Search Engine Reports, Traffic Reports, Social Engagement, Safety, Host Information, Domain WHOIS, Page Speed and much more.

HTML5 scientific graphing calculator, which millions of students around the world use for free. We also create activities on top of that calculator, helping students use a powerful tool to experience all the curiosity, beauty, and sense that math has to offer. Those activities were used so often by so many teachers around the world that we decided to create an Activity Builder, helping every teacher create digital math activities that equal and exceed the activities we create ourselves. E-LEARNING: We invite students to solve challenging problems using the tools they already have. We create a need for new tools before we help students learn how to use them.

Embed tools Valid XHTML YouTube embed code generator Valid XHTML MySpace embed code generator Valid XHTML Vimeo embed code generator Numbers Number to words spelling tool Fibonacci calculator Roman to decimal converter Number base convertor Strings String similarity test tool Online count lines tool Encryption Online hash calculator Online encrypt tool Online decrypt tool Online XTEA encrypt tool Online XTEA decrypt tool Online XXTEA encrypt tool Online XXTEA decrypt tool Online ASCII85 Encoder Online ASCII85 Decoder

We offer free services for all sites, website statistics, website reviews and SEO tools for website owners or any site on the internet, our tool check your own website within a moment and offers website value calculator and Page Rank.

megapixel calculator, a tool to calculate and convert resolution, file sizes. How many pixels in a DVD image? How does that compare to a 5 megapixel camera? What is the resolution of Digital Cinema 2K? The answer is here!

Square Root Calculator that uses Google Chart API formulas.

Calculates the value of websites

A good way to wind up with a color you like is to "tweak" it. With the calculator, you have the ability to incrementally adjust, or tweak, any component of a color. Once you have chosen a color, use these features to fine-tune the color's appearance.

combination of a spreadsheet and a scientific calculator. Support for arithmetic, trigonometric, and statistical functions

We have developed this hourly rate calculator to give you a guide based on your costs, number of billable hours and desired profit. It is a simple tool for you to play with.

Calculate and Share - InstaCalc is a vision for a fast, simple and powerful calculator. This realy neat =) Bookmarklet is in the blog - also submitted to Bookmarklets Diigo Group

WebDigr provides free information to webmasters about their websites and competitors'. It collects website information and statistics, analyze them and translates into several simple and measurable metrics. WebDigr uses more than 10 different sources for its website data input. The numbers you see on WebDigr are estimate results and based on both widely accepted calculation methods and WebDigr own unique calculation methodology."