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Latest NewsStatistics Calculators
August 17th, 2017
I have added a couple of algebraic solvers for arithmetic sequences and geometric sequences.
August 15th, 2017
Z-scores are the way we compute normal probabilities, as any general normal distribution can always be reduced to a standard normal distribution. Check out this Z-Scores Calculator.
August 2nd, 2017
I have found two excellent tutorials one about hypothesis testing, and the other one about statistics and parameters. Both are great reads.
Several Effect Size Calculators
July 31st, 2017
I have added several effect size calculators, including a Gamma Calculator and a Phi Coefficient Calculator.
Cramer's V Calculator
December 25th, 2016
The idea of "effect size" is very relevant in statistics. If often happens that a test statistics is significant, but the association has no practical meaning. This is because a extremely large sample size alone can find significant n extremely small effect. Cramer's V is a statistic that assess the effect size or practical significance of the association between nominal variables. Check it out: Cramer's V Calculator.
Calculator of the Area and Volume of a Pyramid
December 5th, 2016
More solvers for our series of elementary geometry solvers, and we now add a calculator of the area and volume of a square pyramid that will show you all the steps and formulas used to calculate the surface area and volume of a square pyramid of side \(l\) and height \(h\).
Calculator of the Area and Volume of a Cube
December 4th, 2016
We continue our series of elementary geometry solvers, and we now add a calculator of the area and volume of a cube that will show you all the steps and formulas used to calculate the area and volume of a cube of side \(l\).
Calculator of the Area and Volume of a Cone
November 30th, 2016
Keeping the momemtum up, here you have a calculator of the area and volume of a conethat will show you all the steps and formulas used to calculate the area and volume of a right circle cone radius \(r\) and height \(h\).
Calculator of the Area and Volume of a Sphere
November 30th, 2016
Another solver for our Geometry series, a calculator of the area and volume of a spherethat will show you all the steps and formulas used to calculate the area and volume of a sphere of radius \(r\).
Critical Correlation Calculator
November 29th, 2016
Typically found in special tables, here you have a critical correlation calculator. The advantage of this calculator is that it will compute the critical correlation for any value of \(n\), which is not always possible when you use critical correlation tables, which only have a few values of \(n\).
November 28th, 2016
Lots of people were asking for geometry solvers and here they are. I have started a new section for Geometry and I'll be adding more solver on a continuous basis. For now, here I leave for you a area and perimeter of a circle calculator, and an area and volume calculator for cylinders
Polynomial Operations Calculator
November 25th, 2016
This one is a solver that user were clamoring for: Let me introduce our Polynomial Operations Calculator, with which you can add, subtract and multiply polynomials, with the solution shown step-by-step. Also, we have started with MathQuill, and excellent option for enhancing the input of math.
Absolute Value Calculator
November 23th, 2016
We expand even more our Algebra series with some more basic solvers, in this case, a absolute value calculator.
Algebraic Expression Calculator
November 19th, 2016
New solver in our Algebra series, now I have added a solver that evaluates all sort of algebraic expressions that can include any kind of operation (sum, subtraction, multiplication, division), numbers, fractions, trigonometric functions, exponential functions, powers, roots, etc. Check our Algebraic Expression Calculator.
Fraction Operations Calculator
November 19th, 2016
Continuing the series of Algebra solvers, I have added a solver that calculates operations between fractions and shows all the steps. Depending of the operation required it conducts the appropriate steps to reach the final fraction result, in reduced form. Check out our fraction operation solver.
November 17th, 2016
I have made a new function grapher to replace the old flash grapher we had. This time, I used the Google Chart format, that looks more modern and goes along the trend of JS charts.
November 13th, 2016
I get a lots of requests for this one, so here it goes. This is a fraction reduction tool fraction-reduction-lowest-terms.php, that takes a fraction into its lowest terms.
Next Algebra Solver in our series
November 12th, 2016
This time, I added a greatest common divisor, or as it usually known as greatest common factor calculator . I took care to provide as much detail as possible in the calculations shown by the solver.
New Algebra Solver
November 11th, 2016
Today I start with a new series of Algebra solvers. I have added a prime decomposition calculator, you type in a positive integer number and the solver tell you in a detailed way what is its prime decomposition.
New Site Design
September 8th, 2016
I am very pleased to announce that we have rolled a new site design, with a much improved mobile functionality.
More Math Cracks
January 31th, 2016
This time I decided to write on functions and how to deal with them.
Another Math Article
January 20th, 2016
Another article. This time dealing with the possibility of having a software that can solve Math and Stats problems FULLY automatically Check Here.
Another Math Crack
January 5th, 2016
I loved the feedback I got from the first Math Crack, so I decided to pump up the series. I'll be uploading them periodically. This next first Math Crack is about an easy explanation of derivatives.
January 5th, 2016
I finally started a project that I have been wanting to undertake for a while. It is the Math Cracks, which is the way I call to this short tutorials that attemp to explain hard math concepts in simple terms, step-by-step. The first Math Crack of the series is Integration by Parts.
April 21th, 2015
A site update is coming soon. I will be changing the layout a bit so that to keep the solvers in a more organized way and the articles will be organized rather in blog format. I will be adding a complete set of Algebra solvers, so stay tuned.
February 4th, 2015
A couple of tutorials and solvers were added: Quadratic Formula: The meaning of the term -b/2a, an article about Algebra 2 and a Line Plot Maker
January 28th, 2015
I have added a couple of new articles for your reading enjoyment: Math Articles
Minimum Sample Size
December 7th, 2014
I have added a minimum sample size calculator for mean and proportion
Many stats calculators
December 5th, 2014
After long working hours, I've finished all the solvers required to cover all basic statistics topics. The new solvers are: Z-test for two means, Z-test for two proportions, T-test for two means, T-test for paired samples, Chi-Square Goodness of fit, and Chi-Square test of Independence. I also added the most important non-parametric tests, which are the Sign Test, also Wilcoxon Signed Ranks Test, as well as the Wilcoxon Rank-Sum Test and Kruskal-Wallis
Online Accounting Courses
November 12th, 2014
I get asked to review different online curricula. Thanks to a guest writer, I just added a great article about online accounting curricula. You can check it here.
November 11th, 2014
Found a very informational article about the do's and dont's of Accounting Homework Help. You can check it here.
November 11th, 2014
Great changes to improve user experience are coming very soon. I have written recently many math and stats solvers that I'll be adding to the site. I've been polishing the scripts we already have and this is almost turning into a full time job. As many users are aware, we have had ads for the last few months, and even though I don't like ads, it is the only way to support the site, which is turning into a full time job by now. I'm looking for a more efficient way of using ads so that the site can be ad-supported and it continue being free that way.
Various Statistical Tests
November 2nd, 2014
More stat tests done. I have finished a t-test for one population mean with unknown population standard deviation and a Chi-Square test for one population variance. Pretty much as the other solvers I have added, they are simple to use: define hypotheses, and parameters of the test, and a detailed step-by-step calculation is performed.
October 31st, 2014
I've been working on these for a while and I finally finished them. I addedd a z-test for one population mean and a z-test for one population proportion. Very user friendly, define hypotheses, and parameters of the test, and a detailed step-by-step calculation is performed. Recommended.
October 20th, 2014
I just added a working histogram maker. You enter the dataset and the number of bins and a properly scaled histogramn is rendered by the script.
Bar Graph Maker
October 9th, 2014
I have added a very cool bar graph maker. You enter the categories, the values associated with each of the categories, and a bar chart rendered by the script.
October 8th, 2014
Not exactly the typical calculator we do, but I have had some requests for it, so I added a simple mortage calculator tool to compute the monthly payment for a mortage, under basic assumptions (without considering PMI and insurance).
New math solver
October 4th, 2014
I have uploaded a 2x2 system of linear equations solver.
October 4th, 2014
I have updated the pie chart maker script.
Confidence Interval Calculators
October 2st, 2014
I have added two confidence interval calculators. They are confidence intervals for the population mean μ when the population standard deviation σ is known and for when the and a population standard deviation is not known.
Two more more probability calculators
October 1st, 2014
We have two more probability calculators. They are a binomial distribution calculator and a poisson distribution calculator.
Added two more probability calculators
September 30th, 2014
I have added two new probability calculators, based on a couple of requests I had. They are a exponential distribution calculator and a uniform distribution calculator.
Tips for finding math help
September 9th, 2014
I have added a new article. Check it out here.
Grade Calculator Online
June 9th, 2014
I have added a correlation coefficient calculator. This time, the script is more user friendly, and checks for errors in the data before processing them.
Grade Calculator Online
June 4th, 2014
I received a whole lot of e-mails asking for a tool to calculate grades. Well, I just did it. With this online grade calculator you are able to input your assignment/test scores and the calculator will tell your final score and final letter grade. And if you don't have all the grades, the calculator will tell you what score you need to get in your final assignment/test in order to get an A.
June 4th, 2014
After some time of silence, I'm back. As many of you know, I run this site on my spare time trying to keep it as updated as possible. I'm very pleased to see the positive effect the math tools we offer in our site are having in the community. Countless e-mails thanking me for the work I put in the site make me want to keep working even harder. The free online math calculator we provide in the site have even been used as references in scientific papers. That is very cool indeed! I have great plans for the site. Keep visiting.
Discount for math help
Sept 25rd, 2013
Our good friends at MGT are giving specially for us this 15% discount code for their online math homework help services: mthcrk1501 . From references given by users of our community, they are very reliable.
Summer is over
Sept 24rd, 2013
Summer is over, and time is back for some math. We have great plans for this year. Our aim is to offer the best quality free math help, for which reason we will continue adding more and more useful content. We also expect to materialize some very interesting partnerships. Stay tuned!
More Online Stats calculators
May 24rd, 2013
As promised, a couple of critical values calculators have been added: z-distribution critical values and t-distribution critical values
New Online Stats calculator
May 23rd, 2013
A t-distribution probability calculator was added. This is the first delivery of a series of scripts that will be added. Coming soon a couple of online calculators for critical values for the z-distribution and the t-distribution.
March 8th, 2013
I just added an article about math problem solving techniques. See article
List of Calculus Problems
March 8th, 2013
I found a new site offering sample solved calculus problems: Calculus Problems
January 30th, 2013
We have added more than 300 solved statistics problems
January 21th, 2013
Due to a problem with a configuration file the scripts in the site were not working for a while, now they are working fine. Sorry for the inconvenience.
December 18th, 2012
A good tutorial about the normal distribution was addedd. The normal distribution and the standard normal distribution
More Solved Statistics Problems
December 7thd, 2012
I added a good list of solved statistics problems.
Fixed scatterplot tool and added regression line tool
November 3rd, 2012
I made a few adjustments to the scatterplot module, and added a new regression line tool, to complement the existing tool. Linear Regression Calculator
Free Statistics Help Resource
September 29th, 2012
This new resource seems to be very useful, you may find it interesting to take a look Free Statistics Help
Site back up
April 27th, 2010
The site is back up online. For problems out of my control the site was down for a couple of weeks. We'll be back with new material. Thanks to everyone
New section added
May 17th, 2008
I have found a good collection of free solved math problems and math answers.
- Geometry Solvers
In case you have any suggestion, please do not hesitate to contact us.