Bitcoins in circulation
The total number of bitcoins that have already been mined; in other words, the current supply of bitcoins on the network.
The total USD value of bitcoin supply in circulation, as calculated by the daily average market price across major exchanges.
The total size of all block headers and transactions. Not including database indexes.
The total number of blocks mined but ultimately not attached to the main Bitcoin blockchain.
The estimated number of giga hashes per second (billions of hashes per second) the Bitcoin network is performing.
A relative measure of how difficult it is to find a new block. The difficulty is adjusted periodically as a function of how much hashing power has been deployed by the network of miners.
Total value of coinbase block rewards and transaction fees paid to miners.
Total Transaction Fees
The total value of all transaction fees paid to miners (not including the coinbase value of block rewards).
The total number of unique addresses used on the Bitcoin blockchain.
Transaction Volume excluding Long Chains
The total number of Bitcoin transactions per day excluding those part of long transaction chains. There are many legitimate reasons to create long transaction chains; however, they may also be caused by coin mixing or possible attempts to manipulate transaction volume.
Total Output Value
The total value of all transaction outputs per day (includes coins returned to the sender as change).
Estimated Transaction Value
The total estimated value of transactions on the Bitcoin blockchain (does not include coins returned to sender as change).
Bitcoin Days Destroyed
Bitcoin Days Destroyed is a weighted measure of aggregate economic activity, placing value on transacted coins in proportion to the time they have spent idle on the Bitcoin blockchain. For any given transaction, Days Destroyed is calculated by multiplying its estimated transaction value by the number of days since the coins within the transaction were last spent. Bitcoin Days Destroyed is a useful proxy for measuring growth in real value transacted on the Bitcoin blockchain over time, since it controls for rapid movement of coins between wallets (potentially owned by just one entity).
Bitcoin Days Destroyed Cumulative
Bitcoin Days Destroyed is a measure of the transaction volume of Bitcoin. If someone has 100 BTC that they received a week ago and they spend it then 700 bitcoin days have been destroyed. If they take those 100BTC and send them to several addresses and then spend them then although the total transaction volume could be arbitrarily large the number of bitcoin days destroyed is still 700.