<p>If you click the link "Show scripts &amp; coinbase", you'll see the inputs and outputs for the transaction.</p>

<p>The 802 byte transaction had 4 inputs and 2 outputs (1.4BTC and some change, probably). The 118 byte transaction is a mined block and just has a single output.</p>

CC BY-SA 3.0
2012-08-06T22:51:26.453Z
2012-08-07T04:43:20.090Z
2012-08-07T04:43:20.090Z
Highly Irregular
<p>I give a formula that you can use to calculate the size of a transaction given the number of inputs and outputs <a href="https://bitcoin.stackexchange.com/a/3011/659">here</a>.</p>

<p>The most significant factor contributing to the size of a transaction is the number of inputs to transaction has.  Each input contributes 179 to 181 bytes to the size, and each output contributes 34 bytes to the size.</p>

<p>Your large transaction has 4 inputs - that's why it's bigger than the other transaction, which has none.</p>

<p>The actual number of bitcoins spent by a transaction is completely irrelevant, except that there may be a tendency for transactions which spend more coins to require more inputs to make up the amount.</p>

CC BY-SA 3.0
2012-08-06T23:49:27.553Z
2012-08-06T23:49:27.553Z
2017-04-13T12:47:36.707Z
Chris Moore
<p>There's this transaction: <a href="http://blockchain.info/tx/2588df59035129de0f0cb20d2cb5d77d18830043aa68ad2a1a2df7d727bc7a62" rel="nofollow">http://blockchain.info/tx/2588df59035129de0f0cb20d2cb5d77d18830043aa68ad2a1a2df7d727bc7a62</a> that is 802 bytes but for only 1.4BTC</p>

<p>Another transaction: <a href="http://blockchain.info/tx-index/14803514/781333d877bae2b4d8fc7ff856b38989013f0a11668395b8f90b423dd2ffc230" rel="nofollow">http://blockchain.info/tx-index/14803514/781333d877bae2b4d8fc7ff856b38989013f0a11668395b8f90b423dd2ffc230</a> is for 50.4BTC by only 118 bytes.</p>

<p>So what exactly goes into a transaction that would increase / decrease the size of the transaction?</p>

<transactions><transaction-fees>
Why are some transactions larger (in bytes) than others?
Shamoon
# Why are some transactions larger (in bytes) than others?

(Asked by: username_0 on 2012-08-06)

There's this transaction: <http://blockchain.info/tx/2588df59035129de0f0cb20d2cb5d77d18830043aa68ad2a1a2df7d727bc7a62> that is 802 bytes but for only 1.4BTC

Another transaction: <http://blockchain.info/tx-index/14803514/781333d877bae2b4d8fc7ff856b38989013f0a11668395b8f90b423dd2ffc230> is for 50.4BTC by only 118 bytes.

So what exactly goes into a transaction that would increase / decrease the size of the transaction?

**Tags:** transactions, transaction-fees


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## 2 answers

### Answer by username_2 on 2012-08-06. Score: 4 | Accepted answer

I give a formula that you can use to calculate the size of a transaction given the number of inputs and outputs [here](https://bitcoin.stackexchange.com/a/3011/659).

The most significant factor contributing to the size of a transaction is the number of inputs to transaction has. Each input contributes 179 to 181 bytes to the size, and each output contributes 34 bytes to the size.

Your large transaction has 4 inputs - that's why it's bigger than the other transaction, which has none.

The actual number of bitcoins spent by a transaction is completely irrelevant, except that there may be a tendency for transactions which spend more coins to require more inputs to make up the amount.


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### Answer by username_1 on 2012-08-06. Score: 2

If you click the link "Show scripts & coinbase", you'll see the inputs and outputs for the transaction.

The 802 byte transaction had 4 inputs and 2 outputs (1.4BTC and some change, probably). The 118 byte transaction is a mined block and just has a single output.


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