# CryptoNote block reward scheme calculation

The standard CN block reward schedule is calculated using the following formula:

*  Block Reward = (Total Supply of Coins - Already Generated Coins) / (2^emission speed factor)

In the mathematical expression,

* BR = (T - A\*(10^(number of decimals))) / (2^19) / (10^(number of decimals))

For example, let's try to calculate the block reward of the genesis block.\
\
\- T = (2^64) - 1 = 18,446,744,073,709,551,615, a constant\
\- A = 0, This is a genesis block, a varible \
\- emission speed factor = 19, a constant\
\- number of decimals = 8, a constant\
\
Block #1 (18,446,744,073,709,551,615 - 0) \* (2^-19) \* (10^-8) = 351,843.72088832 QWC\
\
For the next block, The calculation is as shown below\
\
Block #2 (18,446,744,073,709,551,615 - 35,184,372,088,832) \* (2^-19) \* (10^-8) = 351,843.72088831 QWC\
Block #3 (18,446,744,073,709,551,615 - 70,368,744,177,663) \* (2^-19) \* (10^-8) = 351,842.37871104 QWC\
Block #4 ... and so on.

The block reward decreases continuously until it reaches a point of tail emission, which is a constant number.

\[Figure 5. Block Rewards and its reduction up to Block Height 2,000,000]

![CN Original Block Emission Schedule](https://2033312304-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M9vS8EzA6RpzXIh8rof%2F-M9vZ_0W1hbh5ubaaD6t%2F-M9v_pmdp1ZQnnht_Kn8%2F7.png?alt=media\&token=c9e9187e-f2e7-4669-b767-7029ac3435bd)

You can also download an excel calculation sheet for [CN original block reward schedule](https://github.com/qwertycoin-org/whitepaper/blob/master/assets/QWC%20Emission%20Calculation.zip) from Qwertycoin Github repository.


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