How to get the ada block height?

Hi, is there any one can tell what is the relationship between epoch, slot and block height?and how to transfer them?

Welcome to the forums, lots of cool and fun things to learn and discuss here.

See ADAtainment’s video on epochs and slots
For the block height, a quick check at adascan shows Epoch 118, Slot 6038 at the time of this writing. I’m not sure what you meant by “transfer them”

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thank you for your reply. I get you about the relationship for epoch and slot like this:
 block_number_height = epoch + slot, such as  118 + 6038 = 1186038, so it is the number of block height, isn't it? 

forget the ‘transfer them’, I just want to know the relationship, : )

I think it’s more like
current maxblock height = (<current epoch #> * <21600 slots/epoch> ) + <current slot #>
I used the term maximum since each slot can have a block in it but there will surely be slots without a block in them. I could be wrong, though.

clio.one has the current number of blocks from genesis and the amount of empty slots.
Blocks: 2,553,356
Empty slots: 1,541

Cool, i get it. thks!