<p>Sure:</p>

<ul>
<li>1 kH/s is 1,000 hashes per second (sometimes mistakenly written KH/s).</li>
<li>1 MH/s is 1,000,000 hashes per second.</li>
<li>1 GH/s is 1,000,000,000 hashes per second.</li>
<li>1 TH/s is 1,000,000,000,000 hashes per second.</li>
<li>1 PH/s is 1,000,000,000,000,000 hashes per second.</li>
</ul>

CC BY-SA 4.0
2020-07-29T22:56:53.420Z
I would upvote it if you bothered to name those abbreviations
Green
CC BY-SA 3.0
2013-04-05T21:42:29.837Z
2014-10-02T16:32:20.143Z
2014-10-02T16:32:20.143Z
Stéphane Gimenez
<p>Mining capability is measured in the number of attempts to find a block a miner can perform. Each attempt consists of creating a unique block candidate, and creating a digest of the block candidate by means of the <code>SHA-256d</code>, a cryptographic hashing function. Or, in short, a <em>hash</em>. Since this is a continuous effort, we speak of <strong><em>hashes per second or [H/s]</em></strong>.</p>

<h2>Hash rate denominations</h2>

<ul>
<li>1 kH/s is 1,000 (one thousand) hashes per second</li>
<li>1 MH/s is 1,000,000 (one million) hashes per second.</li>
<li>1 GH/s is 1,000,000,000 (one billion) hashes per second.</li>
<li>1 TH/s is 1,000,000,000,000 (one trillion) hashes per second.</li>
<li>1 PH/s is 1,000,000,000,000,000 (one quadrillion) hashes per second.</li>
<li>1 EH/s is 1,000,000,000,000,000,000 (one quintillion) hashes per second.</li>
<li>1 ZH/s is 1,000,000,000,000,000,000,000 (one sextillion) hashes per second.</li>
</ul>

<h2>Conversions</h2>

<ul>
<li>1 MH/s = 1,000 kH/s</li>
<li>1 GH/s = 1,000 MH/s = 1,000,000 kH/s</li>
<li>1 TH/s = 1,000 GH/s = 1,000,000 MH/s = 1,000,000,000 kH/s</li>
<li>and so forth</li>
</ul>

<h2>SI unit prefixes</h2>

<p>The denomination of hash rates follows the <a href="https://en.wikipedia.org/wiki/SI#Prefixes" rel="noreferrer">International System of Units (SI)</a>. Hereby, the prefixes <em>kilo</em>, <em>mega</em>, <em>giga</em>, <em>tera</em>, <em>peta</em>, <em>exa</em>, and <em>zetta</em> each translate to an increase by a factor of one thousand. </p>

<p>Please note, that the symbol for kilo is a lower-case "k". As "K" is the symbol for 
<a href="https://en.wikipedia.org/wiki/Kelvin" rel="noreferrer"><em>kelvin</em></a>, the unit of thermodynamic temperature.</p>

<p>The following table from <a href="https://en.wikipedia.org/wiki/Metric_prefix" rel="noreferrer">Wikipedia</a> shows an overview of the prefixes, symbols, and factors they correspond to.</p>

<p><img src="https://i.sstatic.net/DDKSV.png" alt="Metric prefixes"></p>

<h2>Inconsistency of kilobyte, megabyte, and gigabyte</h2>

<p>The computer industry's use of kilobyte, megabyte, and gigabyte is inconsistent with the SI. The Joint Electron Device Engineering Council (JEDEC) has redefined the prefixes kilo, mega and giga in relation with bit and byte as powers of 1024 instead of 1000. Higher prefixes were not redefined by JEDEC. </p>

<p>In order to avoid this inconsistency, the International Electrotechnical Commission (IEC) has proposed the <a href="https://en.wikipedia.org/wiki/Binary_prefix" rel="noreferrer">binary prefix</a> which uses <em>kibi</em> [Ki], <em>mebi</em> [Mi], and <em>gibi</em> [Gi] for 1024¹, 1024², and 1024³ respectively. </p>

<p>The following table from <a href="https://en.wikipedia.org/wiki/Binary_prefix" rel="noreferrer">Wikipedia</a> gives an overview. </p>

<p><img src="https://i.sstatic.net/C1Jch.png" alt="Binary prefixes"></p>

CC BY-SA 3.0
2014-02-01T11:43:31.523Z
2018-04-16T04:57:51.170Z
2018-04-16T04:57:51.170Z
Murch
<p>Hello I would refer you to <a href="http://en.wikipedia.org/wiki/Metric_prefix" rel="noreferrer">wikipedia</a> Metric prefixes. Hashes are measured in standart SI metric prefixes such as </p>

<p>Kilo - 1 000 Hashes/s</p>

<p>Mega - 1 000 000 Hashes/s</p>

<p>Giga - 1 000 000 000 Hashes/s</p>

<p>E.G. 2 Kh/s means that 2 000 hashes can be solved per second. </p>

<p>If you would like to know more about Hash visit <a href="https://en.bitcoin.it/wiki/Hash" rel="noreferrer">bitcoin.it</a></p>

<p>From bitcoin.it :</p>

<blockquote>
  <p>A hash algorithm turns an arbitrarily-large amount of data into a
  fixed-length hash. The same hash will always result from the same
  data, but modifying the data by even one bit will completely change
  the hash. Like all computer data, hashes are large numbers, and are
  usually written as hexadecimal. BitCoin uses the SHA-256 hash
  algorithm to generate verifiably "random" numbers in a way that
  requires a predictable amount of CPU effort. Generating a SHA-256 hash
  with a value less than the current target solves a block and wins you
  some coins.</p>
</blockquote>

<p>Or you might check this:</p>

<p><a href="http://en.wikipedia.org/wiki/Cryptographic_hash" rel="noreferrer">Cryptographic hash</a></p>

CC BY-SA 3.0
2014-02-01T06:59:54.597Z
2014-02-01T06:59:54.597Z
Marek
<ul>
<li><p><code>kH/s</code> means thousands of hashes per second. </p></li>
<li><p><code>MH/s</code> means millions of hashes per second. </p></li>
<li><p><code>GH/s</code> means billions of hashes per second. </p></li>
</ul>

<p>Therefore, <code>300 kH/s</code> are 300,000 hashes per second or 0.3 MH/s.</p>

CC BY-SA 3.0
2013-04-05T21:42:33.983Z
2017-07-05T04:25:01.163Z
2017-07-05T04:25:01.163Z
David Schwartz
<p>I started mining on a friend's computer and it shows 300 kH/s. But when I research other peoples' hash rates I usually see MH/s. Are these speeds the same as kilobytes and megabytes?</p>

<p>Also, when I say 300 kH/s does that mean 300,000 Hashes generated per second? </p>

<hashpower><terminology>
What is the difference between kH/s, MH/s, and GH/s?
Exploit
# What is the difference between kH/s, MH/s, and GH/s?

(Asked by: username_0 on 2013-04-05)

I started mining on a friend's computer and it shows 300 kH/s. But when I research other peoples' hash rates I usually see MH/s. Are these speeds the same as kilobytes and megabytes?

Also, when I say 300 kH/s does that mean 300,000 Hashes generated per second?

**Tags:** hashpower, terminology


---

## 4 answers

### Answer by username_1 on 2013-04-05. Score: 59

Sure:

* 1 kH/s is 1,000 hashes per second (sometimes mistakenly written KH/s).
* 1 MH/s is 1,000,000 hashes per second.
* 1 GH/s is 1,000,000,000 hashes per second.
* 1 TH/s is 1,000,000,000,000 hashes per second.
* 1 PH/s is 1,000,000,000,000,000 hashes per second.

> **Comments:**
> **username_2**: I would upvote it if you bothered to name those abbreviations  

---

### Answer by username_3 on 2014-02-01. Score: 44

Mining capability is measured in the number of attempts to find a block a miner can perform. Each attempt consists of creating a unique block candidate, and creating a digest of the block candidate by means of the `SHA-256d`, a cryptographic hashing function. Or, in short, a *hash*. Since this is a continuous effort, we speak of ***hashes per second or [H/s]***.

## Hash rate denominations

* 1 kH/s is 1,000 (one thousand) hashes per second
* 1 MH/s is 1,000,000 (one million) hashes per second.
* 1 GH/s is 1,000,000,000 (one billion) hashes per second.
* 1 TH/s is 1,000,000,000,000 (one trillion) hashes per second.
* 1 PH/s is 1,000,000,000,000,000 (one quadrillion) hashes per second.
* 1 EH/s is 1,000,000,000,000,000,000 (one quintillion) hashes per second.
* 1 ZH/s is 1,000,000,000,000,000,000,000 (one sextillion) hashes per second.

## Conversions

* 1 MH/s = 1,000 kH/s
* 1 GH/s = 1,000 MH/s = 1,000,000 kH/s
* 1 TH/s = 1,000 GH/s = 1,000,000 MH/s = 1,000,000,000 kH/s
* and so forth

## SI unit prefixes

The denomination of hash rates follows the [International System of Units (SI)](https://en.wikipedia.org/wiki/SI#Prefixes). Hereby, the prefixes *kilo*, *mega*, *giga*, *tera*, *peta*, *exa*, and *zetta* each translate to an increase by a factor of one thousand.

Please note, that the symbol for kilo is a lower-case "k". As "K" is the symbol for
[*kelvin*](https://en.wikipedia.org/wiki/Kelvin), the unit of thermodynamic temperature.

The following table from [Wikipedia](https://en.wikipedia.org/wiki/Metric_prefix) shows an overview of the prefixes, symbols, and factors they correspond to.

![Metric prefixes](https://i.sstatic.net/DDKSV.png)

## Inconsistency of kilobyte, megabyte, and gigabyte

The computer industry's use of kilobyte, megabyte, and gigabyte is inconsistent with the SI. The Joint Electron Device Engineering Council (JEDEC) has redefined the prefixes kilo, mega and giga in relation with bit and byte as powers of 1024 instead of 1000. Higher prefixes were not redefined by JEDEC.

In order to avoid this inconsistency, the International Electrotechnical Commission (IEC) has proposed the [binary prefix](https://en.wikipedia.org/wiki/Binary_prefix) which uses *kibi* [Ki], *mebi* [Mi], and *gibi* [Gi] for 1024¹, 1024², and 1024³ respectively.

The following table from [Wikipedia](https://en.wikipedia.org/wiki/Binary_prefix) gives an overview.

![Binary prefixes](https://i.sstatic.net/C1Jch.png)


---

### Answer by username_4 on 2014-02-01. Score: 6

Hello I would refer you to [wikipedia](http://en.wikipedia.org/wiki/Metric_prefix) Metric prefixes. Hashes are measured in standart SI metric prefixes such as

Kilo - 1 000 Hashes/s

Mega - 1 000 000 Hashes/s

Giga - 1 000 000 000 Hashes/s

E.G. 2 Kh/s means that 2 000 hashes can be solved per second.

If you would like to know more about Hash visit [bitcoin.it](https://en.bitcoin.it/wiki/Hash)

From bitcoin.it :

> A hash algorithm turns an arbitrarily-large amount of data into a
> fixed-length hash. The same hash will always result from the same
> data, but modifying the data by even one bit will completely change
> the hash. Like all computer data, hashes are large numbers, and are
> usually written as hexadecimal. BitCoin uses the SHA-256 hash
> algorithm to generate verifiably "random" numbers in a way that
> requires a predictable amount of CPU effort. Generating a SHA-256 hash
> with a value less than the current target solves a block and wins you
> some coins.

Or you might check this:

[Cryptographic hash](http://en.wikipedia.org/wiki/Cryptographic_hash)


---

### Answer by username_5 on 2013-04-05. Score: 5

* `kH/s` means thousands of hashes per second.
* `MH/s` means millions of hashes per second.
* `GH/s` means billions of hashes per second.

Therefore, `300 kH/s` are 300,000 hashes per second or 0.3 MH/s.


---

