<p>Given the time of one slot is defined by <code>slot_length</code> being one second right now.</p>
<p>And the chain parameter <code>active_slots_coefficient</code>, which gives us the proportion of slots in which blocks should be issued, it is set to 0.05.</p>
<p>This means, that we can expect one block in average in <code>1 / 0.05 = 20</code> seconds.</p>
<p>However, you must account for mempool and pending transactions too.</p>

CC BY-SA 4.0
2021-11-19T16:51:22.817Z
2021-11-19T16:51:22.817Z
Marek Mahut - StakeNuts
<p>Average block time is 20 seconds, so...</p>
<p>Average-time-to-depth-N = N x 20 seconds</p>

CC BY-SA 4.0
2021-11-19T01:00:47.540Z
2021-11-19T01:00:47.540Z
zhekson
<p>I realize that the time it takes to reach specific depths is not precisely calculable. Nonetheless, there must be a rule of thumb for roughly how long each block takes to process. For example, if we want to estimate how long it will take for a transaction to reach a depth of 20, what formula should we use?</p>

<wallet><cardano-node><transaction>
How long does it take for a transaction to reach a given depth? (How long to reach depth N?)
# How long does it take for a transaction to reach a given depth? (How long to reach depth N?)

(Asked by: username_0 on 2021-11-19)

I realize that the time it takes to reach specific depths is not precisely calculable. Nonetheless, there must be a rule of thumb for roughly how long each block takes to process. For example, if we want to estimate how long it will take for a transaction to reach a depth of 20, what formula should we use?

**Tags:** wallet, cardano-node, transaction

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## 2 answers

### Answer by username_1 on 2021-11-19. Score: 2

Given the time of one slot is defined by `slot_length` being one second right now.

And the chain parameter `active_slots_coefficient`, which gives us the proportion of slots in which blocks should be issued, it is set to 0.05.

This means, that we can expect one block in average in `1 / 0.05 = 20` seconds.

However, you must account for mempool and pending transactions too.


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### Answer by username_2 on 2021-11-19. Score: 1

Average block time is 20 seconds, so...

Average-time-to-depth-N = N x 20 seconds


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