<p>According to the <a href="https://en.bitcoin.it/wiki/Transaction_fees#Sending" rel="nofollow">Bitcoin.it-wiki page on Transaction fees</a> are dependent on multiples of <strong>1,000 bytes</strong>  (rounded up).</p>

<p>The above page cites Gavin Andresen's <a href="https://bitcointalk.org/index.php?topic=219504.msg2311420#msg2311420" rel="nofollow">post on 0.8.2 Release notes</a>:</p>

<blockquote>
  <p>The default fee for low-priority transactions is lowered from 0.0005 BTC
  (<strong><em>for each 1,000 bytes in the transaction</em></strong>; an average transaction is
  about 500 bytes) to 0.0001 BTC. [emphasis mine]</p>
</blockquote>

CC BY-SA 3.0
2014-03-26T12:32:11.953Z
2015-07-21T13:05:27.910Z
2015-07-21T13:05:27.910Z
Murch
<p>Here is the latest changed(commit) made for the fee drop: <a href="https://github.com/bitcoin/bitcoin/commit/beabca2be092d0e2a1de26989d4e63a12cce1284#diff-279f95e952b2c1cff13bdfbcd7bc36ee" rel="nofollow">https://github.com/bitcoin/bitcoin/commit/beabca2be092d0e2a1de26989d4e63a12cce1284#diff-279f95e952b2c1cff13bdfbcd7bc36ee</a></p>

<p>It seems to be a multiple of 1,000 bytes as it's seen in the source code.</p>

<p>So yes, it's a multiple of <strong>1000 bytes</strong>, not <strong>1024 bytes</strong>.</p>

<p>Cheers,</p>

<p>-Besir</p>

CC BY-SA 3.0
2014-03-26T13:47:16.237Z
2014-03-26T13:47:16.237Z
Besir Kurtulmus
<p>Wikipedia <a href="https://en.wikipedia.org/wiki/Kilobyte" rel="noreferrer">says</a> kB = 1000 bytes and KB = 1024 bytes.</p>

<p>Which one are we using for Bitcoin?</p>

<transaction-fees>
A fee is added per kilobyte of data. That means 1000 bytes or 1024?
ChocoDeveloper
# A fee is added per kilobyte of data. That means 1000 bytes or 1024?

(Asked by: username_0 on 2014-03-26)

Wikipedia [says](https://en.wikipedia.org/wiki/Kilobyte) kB = 1000 bytes and KB = 1024 bytes.

Which one are we using for Bitcoin?

**Tags:** transaction-fees


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## 2 answers

### Answer by username_1 on 2014-03-26. Score: 5

According to the [Bitcoin.it-wiki page on Transaction fees](https://en.bitcoin.it/wiki/Transaction_fees#Sending) are dependent on multiples of **1,000 bytes** (rounded up).

The above page cites Gavin Andresen's [post on 0.8.2 Release notes](https://bitcointalk.org/index.php?topic=219504.msg2311420#msg2311420):

> The default fee for low-priority transactions is lowered from 0.0005 BTC
> (***for each 1,000 bytes in the transaction***; an average transaction is
> about 500 bytes) to 0.0001 BTC. [emphasis mine]


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### Answer by username_2 on 2014-03-26. Score: 2

Here is the latest changed(commit) made for the fee drop: <https://github.com/bitcoin/bitcoin/commit/beabca2be092d0e2a1de26989d4e63a12cce1284#diff-279f95e952b2c1cff13bdfbcd7bc36ee>

It seems to be a multiple of 1,000 bytes as it's seen in the source code.

So yes, it's a multiple of **1000 bytes**, not **1024 bytes**.

Cheers,

-username_2


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