# How reputation scores are calculated - the details explained with simple math

in steemit •  2 years ago

I couldn't find a really good explanation of reputation, so I read the code, and here's what I discovered.

## Simplified vs. Raw scores

The score displayed on your Steemit profile is not the actual value stored in the Steem blockchain, but a simplified version. The scores on profile pages range from a minimum of roughly -25 to maximum of around 75, with newly-opened accounts placed exactly in the middle at 25. The raw scores on the blockchain, however, are actually values in the millions, billions, or even trillions (and these can also be positive or negative).

Simplified scores are shown on Steemit profiles, for example here: steemit.com/@username. Raw scores can be found on steemd.com/@username, note the slightly different domain names there. On steemd.com scroll to the bottom row of the first data box, where it says "Reputation", you'll likely see a number in the billions.

## Here comes the math

Numbers in the billions are good for computers to do lots of complex math and fine tuning, but they're not easy for humans to read, hence the simplifed version shown on profile pages. Here is the formula for the simplification:

• Take the log base 10 of the raw score
• Subtract 9
• Multiply by 9
• Round down to the nearest integer

So a raw score of 26,714,311,062 becomes a simplified score of 37.

Actually, it's a little more complicated than that, but this is a good summary. I'll leave the extra details out for now, because I want to keep this simple. Scores in the lower end are normalized to 25. It takes a little while for newly-registered users to move off 25, but once you finally get to 26 or above then the formula described above is valid.

This is a snippet of the actual code used by the system. It should make sense to most programmers:

If you want to read and decipher the exact math, see the code in GitHub on the following page. Look at the last section, beginning "export const repLog10".

https://github.com/steemit/steemit.com/blob/master/app/utils/ParsersAndFormatters.js

As mentioned, for new users the simplified reputation score is always 25, and it stays there for a while even if you post and comment a few times. Only once your raw score exceeds around 1,300,000,000 will you finally move up to a simplified score of 26. These are aproximate rounded numbers matching simplified scores to raw scores:

• 26 = 1,300,000,000
• 27 = 2,000,000,000
• 29 = 3,000,000,000
• 31 = 5,000,000,000
• 34 = 10,000,000,000

Note that buying Steem or Steem Power does not increase reputation. Only posting, commenting, and curating will increase your rep. So if you'd like to see your reputation increase (and thus your curation power) the secret is to get engaging! Post and comment with some high-quality and original content.

## Further details

While studying this, I also found the following post by @dantheman helpful. It doesn't quite cover the details I've described above, but it provides other useful info about how reputation works:

https://steemit.com/steemit/@dantheman/brief-update-on-reputation-score

Also note, it's possible these reputation calculations could change at any time. So if you've Googled and are reading this some time in the future, take care to go back to that GitHub page and check the code again.

Sort Order:

Great info, I have been looking for this! I will be linking to this article in the Official Steemit FAQ.

If possible, could you do another post showing examples of how a person's score would be affected in particular scenarios? For example​:
If someone with X amount of Steem Power and X reputation score likes my post, how much will my reputation score increase?

https://steemit.com/steemit/@shenanigator/official-steemit-faq-rough-draft-your-edits-are-needed

Also, based on the math you lay out in this post, I think I had some misinformation in my rough draft that I linked. I said:

It uses a log10 scale, meaning:
A score of 30 is 10x better than a score of 20
40 is 10x better than 30
50 is 10x better than 40, and so on

If that is, in fact, wrong, can you tell me what would make it correct?

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I think that's correct. Dan said roughly the same thing in his post that I link at the bottom of my article, and I'm sure he knows better than me.

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very interesting calculation! thank you for this! A bit frustrated how you got that amount of vote, life is really unfair! tsktsk

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·  last year

A proper log10 scale would mean a score of 41 was 10x a score of 40... I think this means it's not a true log10 scale. Just a ((log10)/10) scale... if that makes sense?

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Thank you @digitalnotvir
I'm new in steem.
Hope I will progress in this platform

·  last year

Really helpful and most appreciated. I post a full essay every weekday, over 300 already, and I write all of them myself. Really hope that all of you will take a look at them -- they cover life, politics, sports and entertainment. I work toward high-quality writing, solid editing, and try to make a good point every day.

·  last year

this was so helpful, thank you for this post!

Very useful and interesting article. Thank you. I just don't understand what is "raw score" and where I can see this?

How many votes would u need roughly to go form 25 to 26?

Nice information

·  last year

This is a most of the great article @digitalnotvir. It's by far the most informative explanation of the reputation system that I've come across. Only posting, commenting, and curating will increase your rep @tuhin201

I am begging everyone who cares about steemit to stop saying "Quality Content". It is bullshit. Everyone is acting like we are in college. It isn't about high quality content there are thousands of posts a day. Very high quality that get a few votes. That is a problem. Quit telling people it is there writing it isn't good enough when it doesn't matter.

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You have a point, to a certain extent. People who already have a high reputation seem able to post junk and still get it upvoted. Whereas those with low reputation can post quality and it'll be ignored. I think the secret is to study the system closely, work it, and gradually build your reputation up. Then, once you have your rep, you can post your quality content and it will continue to do well. In summary, it's a matter of pulling yourself up with your own bootstraps. It's not easy, but then, it's not necessarily meant to be.

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Agreed, my advice is... try to get noticed. (Without offending everyone) lol. Keep Steeming

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I agree with this point. As a newbie it is harder to get into this.
I guess I will try to fight my way to the top :)
But yeah Followers are a problem, some people post and get so many upvotes even if it is a small update of a Crypto Coin or something.

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·  last year

I keep hearing how hard it is for newbies. I'm new and on my second day I have a rep of 41. I have three blog post with 15 votes and 25 comments. I also left 18 comments. I'm set to make \$15 SBD at this point which I think is pretty decent considering it's just day two. Maybe it's beginners luck but I think content (and the way you share it)
may have something to do with it. Nothing good comes easy. Push yourself to be a better author and marketer.

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·  last year

I'm a refugee here from other platforms and I must say it's easier to get started. Markdown is way better than WYSIWYG or the other attempts that aren't pure HTML.

In terms of monetising, it is about quality. You need to build a community of like-minded people, who would upvote you. Simple as that, and it works. On other platforms, you need hits that translate into advert clicks. It's silly.

This is a great article! It's by far the most informative explanation of the reputation system that I've come across. The link for the raw reputation information was great.

It's been so frustrating being stuck at 33 for my reputation! Have to keep working on it :).

·  last year

Thank you for taking the time to share. Really useful information. Deserve more upvotes!

Very important and critical piece of information to note here is the fact that Steem or Steem Power will not increase your reputation. Only posting, commenting, and curating will increase your rep, so what does that mean ??? It means get social my friends.

Great information

Thanks, very nicely explained, a bit clear.

Cool info, this is what I need :)

Awesome - makes total sense. @digitalnotvir thanks for sharing this. followed

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Nevermind - as of 06/15/17 @digitalnotvir is a dead account. :(

Thanks for sharing!

.. and judging by how little you've earned from this great article their reputation and rewards system is clearly flawed.

·  last year

This is a great and detailed post, thanks you!

·  last year

So the higher score the better the reputation as I understand you?

·  last year

I just signed up a short time ago so these questions popped into my head. Glad someone wrote about it. Thank you for taking the time.

·  last year

Very interesting! I wasn't sure how all this works but now it starts to make some sense

·  last year

Thank you for writing about this, it's very informative. I guess as a newbie I will have to have patience to move away from the 25 score..

·  last year

That's more or less simple explanation. I finally got to know it. Thanks a ton :)

Thank you for the information on Reputation Scores. It is good to know how they are calculated.

·  last year

Very Helpful Post for calculation reputation score.Now I come to understand how steemit actually culcatlate our accounts score.

This post has been linked to from another place on Steem.

·  last year

thank you @digitalnotvir. exactly what i was looking for.

thanks

·  last year

Very interesting

·  last year

Does Steem factor in also the amount of times a person posts? Because most of my posting is done on the weekend, with large lulls during the workweek. If I were to have a more 'even' post schedule would this be reflected in the number, or is it as you've shown, purely on engagement.

Thanks you! I was wondering why my reputation is not changing and I didn't know where to monitor it. Now I understand that I have to be more involved in the community.

·  last year

I was wondering about it for a while because I've been stuck on my reputation (40) for a while and I'm hoping to go up to make some motivation for me but.. I need to post more to see the good results.. thank you

·  last year

@digitalnotvir Thanks for the simple understandable analysis. As new user was curious wtf these numbers mean.

cheers

·  last year

This post should be on on FAQ or help section. thanks for this post.

-- a goat

·  last year

Very useful post. Thanks.

·  last year

Thanks for clarifying how reputation scores are calculated. I've been stuck on 39 for over a week now hopefully I'm close to moving up to 40! :D

Wonderful! Thank you for your explanation!

So this is really interresting. Thanks a lot for this post, I'm new here and this made me understand a lot better how reputation works.

Thanks for posting and explaination to another piece of the crazy Steemit puzzle.

Good information. Much appreciated!

your reputation post is great and mind blowing it help me better.

Thanks. Great informations

Useful post will go and check other links provided by you.

This study is very informative. I can definitely understand how steep it works even more thanks to this post. Thanks @digitalnotvir.

After reading your article, I know how to improve my reputation. thank you!

Great information sir.im new user

Thank you for your detailed explanation, which made me understand this point. You are great.

I really appreciate this practical and systematic explanation. Very easy to follow indeed

Posted using Partiko Android

·  last year

what makes rep go down i was 30 a day ago

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·  last year

As far as i figured it out so far i think there are positive and negative votes. On this post u have negative i think. Click on vote button not UPVOTE the one next to it with numbers and there is MINUS sign before name that voted i think thats negative. And upvotes before name are with + sign.