Guide to mempool.space

Published July 13, 2025

  • YouTube Video Transcript

    00:00 Hey everyone, this is a quick guide to
    00:03 mempool.space
    00:05 This is a techie video, so this is not
    00:07 something the average person needs to
    00:09 deal with, but I figured I would just
    00:11 give you a quick run through on what
    00:13 this is because not everybody knows what
    00:15 a meool is. And this is an advanced
    00:17 video and I will go back and tag it as
    00:19 such. Okay, so when you go to
    00:21 mempool.space space up here in the uh
    00:25 browser. Uh what you see is the current
    00:28 happenings on the Bitcoin network. So
    00:31 I’m going to walk you through what this
    00:32 is. The most recent block is block
    00:35 874,786.
    00:38 That is the most recent block of
    00:39 transactions that has been solved by the
    00:42 Bitcoin miners and cemented permanently
    00:45 and forever onto the Bitcoin blockchain.
    00:48 This thing up here at the top is the
    00:50 Bitcoin blockchain. this dividing line
    00:52 that shows the up and down arrows here
    00:54 and the left and right arrows here. That
    00:56 dividing line is between blocks that
    00:58 have been mined on the right side and
    01:01 blocks that have not yet been mined on
    01:03 the left side. So you’ll see uh let’s go
    01:06 through it item by item. On the right
    01:08 side, the average price per transaction
    01:11 was six sats per vite. Uh the range was
    01:15 between six and 339 sats per vite.
    01:18 That’s how expensive transactions were.
    01:20 I’m not going to explain exactly how
    01:22 that’s calculated because it gets too
    01:23 technical for this video, but the mining
    01:26 transactions uh in that were worth 07
    01:30 bitcoin. You’ll see in previous uh
    01:32 blocks it was 066 088. And this one back
    01:36 here was a a more uh I guess lucrative
    01:40 block to mine.242.
    01:42 Over time, those uh that amount of
    01:45 Bitcoin keeps going up, which makes the
    01:47 uh Bitcoin transactions worth mining. Uh
    01:51 in addition to the block reward, whoever
    01:52 mines that block gets uh 3.125 Bitcoin.
    01:56 These blocks were mined 18 minutes ago.
    01:58 The one before that was 5 minutes before
    01:60 it. The one before that was one minute
    02:01 before it. The one before that was 11
    02:03 minutes. And the one back before that
    02:05 was 20 minutes. Overall, it’s about 10
    02:07 minutes, but it uh it does uh change
    02:10 over time. Okay. So if you want to and
    02:13 then let’s go over here. Okay, so coming
    02:15 up uh eight sats per vite is what it
    02:18 takes to get in the upcoming block. The
    02:20 total bids are between seven and 302
    02:22 sats per vite. Whoever mines this
    02:25 upcoming block is going to get 103
    02:28 bitcoin in addition to the block reward
    02:31 of 3.125 bitcoin. Uh and then it always
    02:34 is going to say estimated 9 minutes 1928
    02:38 38. That’s always estimates. uh and you
    02:40 can you can see the number of
    02:41 transactions. So most of these uh past
    02:44 transactions have between 4,500
    02:46 transactions and 5,600 transactions.
    02:49 These do not count all There you go.
    02:51 Hey, the block just got solved. So
    02:54 Foundry USA just solved a block with
    02:57 four uh 4,640
    02:60 transactions in it. They got 0102
    03:02 Bitcoin and they was done just now.
    03:06 Okay. And that means all of the
    03:08 transactions that were in this first
    03:10 block are now permanently uh permanently
    03:14 uh cemented into the Bitcoin blockchain.
    03:16 And you’ll see it actually took 20
    03:18 minutes between these two blocks uh or
    03:20 19 or so. And now all of the Bitcoin
    03:23 miners are working on mining this block.
    03:26 All right. So, as we go down, what does
    03:27 it take to get in the next Bitcoin
    03:29 block? If you don’t care, you know, if
    03:31 it takes an hour or two or three, you
    03:33 can uh bid um as low as 57 cents. You
    03:37 can get a transaction in at uh for 57
    03:40 cents. If you want it to get in in the
    03:43 next 20 or 30 minutes, um you need to
    03:46 pay 85 cents to transact on the Bitcoin
    03:48 network. Again, this does not count
    03:50 transactions within Coinbase, which are
    03:52 free. It does not count transactions on
    03:55 the Bitcoin Lightning Network, which are
    03:57 a fraction of a penny. Um, it this is
    03:59 just transaction on the base layer of
    04:03 the Bitcoin blockchain. The the most
    04:05 expensive, the hardest. This is the kind
    04:07 of this is where you transact. If you’re
    04:09 transacting, you know, millions of
    04:12 dollars, billions of dollars, you know,
    04:14 all of that would take place on this
    04:15 blockchain. And right now, anywhere in
    04:17 the world, you can spend 99 cents and be
    04:21 guaranteed that you will go in the next
    04:22 block. So literally you can send a
    04:26 billion dollars anywhere in the world
    04:28 right now on the Bitcoin blockchain with
    04:30 absolute certainty that it will be
    04:33 delivered that the transaction will be
    04:35 irreversible and that you know all of
    04:38 that is possible for less than a dollar
    04:40 for an unlimited amount of money. All
    04:42 right. And I’ve I’ve talked in previous
    04:44 videos over here on the right on the
    04:46 Bitcoin uh block difficulty. Right now,
    04:48 this uh the last two weeks has been
    04:50 averaging at about 9 and a half minutes.
    04:54 And what that means is uh the Bitcoin
    04:56 miners are mining a little bit too
    04:58 quickly, which means the network is
    04:60 about to adjust the mining difficulty up
    05:02 by 5.28%.
    05:04 Uh that’s going to happen in the next 24
    05:07 hours at roughly December 15 at 4:53
    05:10 p.m. In 24 hours from now, the network
    05:13 it will become 5.28% 28% more difficult
    05:16 to find a m bitcoin block. That is 5%
    05:19 more, which will result in all of these
    05:21 miners that are finding blocks at 9.5
    05:23 minutes going back to 10 minutes. The
    05:26 network is constantly adjusting every
    05:27 two weeks up and down uh to make sure
    05:30 that it’s always about that period of
    05:32 time. Uh on the right side here, it says
    05:35 if you submit a really cheap
    05:36 transaction, it’s going to purge it and
    05:38 it’s not even going to pay attention. Uh
    05:41 this memory usage is complicated. I
    05:43 won’t go through that. There’s a bunch
    05:45 of junk transactions that are really
    05:46 small that nobody cares about. And then
    05:48 it just shows the incoming transactions.
    05:50 I’ll come back to this uh thing up here
    05:52 on the left. And then re it shows recent
    05:54 transactions and uh recent replacements
    05:58 which is again too technical for this
    05:59 video. All right. So this is a Bitcoin
    06:02 block that is in the process of trying
    06:04 to be mined. This shows all the
    06:06 transactions. This shows consolidation
    06:08 transactions where a group of Bitcoin
    06:10 transactions are being consolidated into
    06:12 a single transaction uh which is done to
    06:15 save future transaction fees or to
    06:18 simplify the storage of Bitcoin. Coin
    06:20 joins which usually there’s very few are
    06:23 when people are combining Bitcoin to
    06:25 enhance their privacy, not something an
    06:27 average person needs to do. And there’s
    06:28 also data transactions where people are
    06:30 using the Bitcoin blockchain to uh
    06:33 submit anything. It could be a message
    06:36 to a loved one. It could be um an image.
    06:39 It could be uh a piece of data like uh
    06:42 election records. They did this in
    06:44 Guatemala where uh they were constantly
    06:46 cementing the election results in the
    06:49 Bitcoin blockchain as the election
    06:51 results were rolling in to guarantee
    06:52 that nobody could change them. So people
    06:54 are using the Bitcoin blockchain for a
    06:56 lot of things in addition to
    06:58 transmitting Bitcoin uh value because it
    07:01 is the most it’s what’s called an
    07:03 immutable ledger. An immutable ledger is
    07:05 a ledger that can never be changed. And
    07:08 the Bitcoin blockchain is the most
    07:09 immutable thing humans have ever
    07:12 invented. Let’s say the least immutable
    07:14 would maybe be a white uh you know a dry
    07:16 erase board or a white board or a
    07:18 blackboard or whatever where you can
    07:20 literally walk up, wipe your hand across
    07:21 it, and it goes away. Uh that is the
    07:24 most easily changeable. Or maybe you
    07:25 draw your name in the sand and somebody
    07:27 kicks sand across it and it’s gone. The
    07:30 most immutable thing humans have ever
    07:32 invented in the entire world is the
    07:35 Bitcoin blockchain. So, a lot of people
    07:37 use the Bitcoin blockchain to anchor
    07:39 things for which they need an absolute,
    07:41 complete, and immutable record, meaning
    07:43 a record that absolutely cannot change,
    07:46 such as election outcomes in a country
    07:48 like Guatemala again. And they used the
    07:51 Bitcoin blockchain uh to uh as the
    07:54 election results were rolling in, they
    07:56 wrote them to the Bitcoin blockchain to
    07:58 guarantee that there would not be any
    07:59 shenanigans and that nobody could change
    08:01 the record of the votes. Um, so that’s
    08:04 what these transactions are. again. But
    08:06 if we go back and look at coin joins and
    08:08 consolidations, here’s all of them. So
    08:10 if we take a random, let me try to look
    08:13 at just a random transaction. Let’s say
    08:16 we look at here, I’ll pick one over
    08:18 here. Um, so here’s a random transaction
    08:22 six minutes ago. I just picked it out of
    08:23 the blue. Uh, this says six minutes ago
    08:27 someone is trying to they paid $2.37.
    08:32 They are trying to transmit. Let me see
    08:34 if I can tell. uh 0.00 00 uh three
    08:38 bitcoin and let me see. Normally it’ll
    08:40 show you the US dollar value of that so
    08:42 you don’t have to figure it out yourself
    08:44 but I’m not immediately seeing that. Let
    08:46 me see if I normally you can turn it on
    08:48 and off. Um
    08:51 fee rate.
    08:53 Okay. I’m not immediately seeing it but
    08:56 or maybe you have to click here. Um,
    09:03 let’s see if it’ll tell us how much
    09:04 they’re transacting here. Okay, here we
    09:06 go. Uh, $312. So, somebody used the
    09:08 Bitcoin blockchain to move $312.
    09:12 And, uh, we can go in and look at, you
    09:14 know, why they did it, how they did it,
    09:16 all that sort of stuff. Um, we don’t
    09:18 know why they did it, but we can look
    09:19 at, you know, the mechanics of that. Um,
    09:21 so anyway, um, we’ll look at, uh, let me
    09:24 see if there’s a bigger one. Um,
    09:28 okay. Let’s see if
    09:32 down here.
    09:37 Let’s let’s look at the hottest
    09:39 transaction here. Someone was willing to
    09:40 pay 30 bucks. Um, they paid 30 bucks to
    09:45 move.
    09:46 Again, sometimes people just do this for
    09:48 no reason. Oh, to Bitcoin. Okay. So,
    09:50 they uh for security reasons, maybe it’s
    09:53 a multi- signature wallet or something
    09:55 like that, but they wanted to pay $30.
    09:58 They were willing to pay extra in order
    09:60 to move Bitcoin that was worth uh two
    10:03 Bitcoin total. So, $200,000. So, whoever
    10:06 did this um is moving $30,000 one place
    10:11 and $182,000
    10:13 another place, $213,000.
    10:15 and they decided to pay the most
    10:17 expensive fee for this entire
    10:19 transaction. The most expensive fee in
    10:21 the entire block of this entire
    10:23 transaction, which is this bright red
    10:25 one up in the corner. And let’s see what
    10:27 somebody’s doing down here in the bottom
    10:29 left. All right. So, we’ll look at this
    10:32 transaction down here. Somebody paid a
    10:34 buck 29 to move.
    10:38 What did they move? They paid a buck 29
    10:40 to move.
    10:43 Okay. uh $354.
    10:46 So, you know, people are using the
    10:48 Bitcoin blockchain for everything. So,
    10:50 that’s a quick rundown. Uh the coolest
    10:52 little animation, which we’ll see when a
    10:54 block gets mined, is when somebody uh uh
    10:57 mines a block, you see all of these
    10:59 transactions here get uh swooshed away.
    11:03 And you s you could see the top of that
    11:05 earlier when the Bitcoin uh block got
    11:07 mined real time. You can see it just in
    11:09 the bottom left uh how it just sort of
    11:11 blows away and then it starts working on
    11:14 the next block. You can also see here uh
    11:16 every few seconds it updates to reflect
    11:18 new transactions that have entered uh
    11:20 the Bitcoin um uh blockchain and or the
    11:25 meool waiting to be written to the
    11:26 Bitcoin blockchain. So for example,
    11:28 there’s a bright red one. Let’s see what
    11:30 they’re doing with this one right here.
    11:32 All right, somebody’s paying 23 bucks.
    11:34 Super expensive. And they are doing that
    11:36 to move
    11:39 H something’s not right. It’s not
    11:40 showing me the actual
    11:43 It’s not showing me the actual total for
    11:44 some reason. Uh of how much they
    11:46 actually are spending to move. But
    11:48 anyway, um so this is, you know,
    11:51 technical video and again if we watched
    11:53 long enough, we would see the very cool
    11:54 animation where it just uh blows away
    11:57 the old transaction as they get
    11:59 permanently cemented to the blockchain
    12:01 and it shows us new transactions from
    12:03 there. So that is the mempool. It’s
    12:05 super technical. You don’t need to mess
    12:06 with it. But you know, this is basically
    12:09 the vitals of the Bitcoin blockchain.
    12:11 Again, it does not show you all the
    12:13 transactions happening on Coinbase or
    12:15 places like that. It does not show you
    12:17 all the people buying coffee with a
    12:19 Bitcoin lightning transaction. It just
    12:21 shows you the uh the most immutable
    12:24 transactions, the transactions that
    12:26 people want permanently and forever uh
    12:28 absolutely cemented in stone and that
    12:31 absolutely positively will never be
    12:33 reversed. Those are the transactions
    12:35 that are written here.

Guide to https://mempool.space/

**Originally recorded 12/14/24**

Share this content

Disclaimer:

The content provided in this post is for educational purposes only. It should not be considered financial, investment, or trading advice. I am not a licensed financial advisor, and all opinions expressed are my own. Always conduct your own research and consult with a qualified financial advisor before making any investment decisions. Investing in Bitcoin or any other assets carries risk, and you should never invest more than you can afford to lose.

Post category:

  • Facebook Live

Subscribe to Joel's Friday Roundup ✉️

Stay current with the latest bitcoin insights with the Friday Roundup newsletter –  Joel’s latest posts from the week, wrapped up in a single email for easy viewing. 

Global Email List Subscription Form

NOTHING for sale. No SPAM ever. Unsubscribe anytime.