**strugar**Hi. Has anyone tried to build Poisson calculator? I don't see Poisson function in available functions list, so I wonder what is the easiest way to do the calc. Of course I can build it from the scratch, but I also don't see factoriel function, so it would be painfull process to do entire calc manually...

Thanks!

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**Welvin**Hi,

I searched for it, but I've found multiple results. I think it has the same formula, but can you please confirm if it's the same here: http://www.endmemo.com/statistics/poisson.php.

Thank you!

**strugar**Hi. Thanks for reply!

Yes, it is the calculator.

Calculation itself is not the problem, there is a formula and one just needs to follow it; though, as I need about 20 fields, I just wondered if there is an easier way.

But nevermind, in the meantime, I started building the calculator, you can see it here: http://form.jotformeu.com/form/42325043228345 , I have checked, and it gives the same results as the calculator you mentioned, so it means it works correctly.

I created one field, and then duplicated it and adjusted formulas isnide, so it's not as difficult as I thought - I did not notice "Duplicate" function in the beginning.

Thanks for looking into this issue anyway! :)

- JotForm Support
**Welvin**You are welcome and that's great to know! Well, the calculation is perfect :) I would like to clone and share it, can I?

Regards

**strugar**Yes, of course you can, you're welcome! You just pay attention to the purpose of calculator - I'm building this one to calculate probability of certain number of goals in football match, based on expected number of goals.

**Peter**Hey,

just came accross this... I personally really like the following calculator for poisson distributions: https://www.plotgraphs.com/mathtools/poisson-distribution/ It is straight forward. If you later want to translate the obtained probability in significance level you can also check out the significance calculator there..

Regards