Online Normal Distribution Calculator
Usage
Fill in the values in the correct text fields and calculate the result. The graph will show you what you’ve calculated.
Browser support
Following browsers fully support the calculator:
- Firefox 3.6 and up
- Google Chrome 4 and up
- Safari 5 and up
- Opera 10.63 and up
Following browsers partially support the calculator:
- Firefox 2.0, 3.0, 3.5
- Safari 4
Following browsers do not support the calculator:
- Internet Explorer
- Opera 10 and before
For best performance, use Google Chrome.
Feedback
I’m always interested in your opinion. Have comments, suggestions or a bug report? Leave a comment below.
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Thank you so much for such a wonderful tool. It has helped me tremendously with my Algebra homework this semester. I had to let you know that there are those of us that appreciate and commend your hard work!
You’re welcome, that’s exactly why I set it up!
Very nice! I especially like the way you incorporate the graphic depiction of the area under the curve along with the probability values. I also like the ability to find areas bounded by 2 variables. Other online calculators don’t have that option – at least not those I’m familiar with. Well done!
Thanks, appreciate it!
Hi Maarten, thank you for this really useful tool. But, would you mind adding the inverse cumulative distribution function as well? That would be great!
I’ll look into it, but can’t really promise anything. I made this tool because a lot of people need it and no better alternative was around, I’m not sure whether that function is needed as much as well :P
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Thank you so much! This calculator has been really helpful. As a side note it would be nice if I could input the P value and it would tell me the Z score.
Anyway great calculator.
Thank you very much! I like the simplicity and the graphical aspect of the calculator. By the way, adding inverse calculator could be nice as well.
Thanks, and very good idea! I’ll add the inverse calculator some time in the future.