eth_units.txt

USD = [Dollars]
eth = [Ether] = ETH
PriceETHUSD = USD / ETH

kETH = 1000 * ETH = keth = kilo_eth
METH = 10 ** 6 * ETH = mega_eth
GETH = 10 ** 9 * ETH = giga_eth
wei = 10 ** -18 * eth
kwei = 10 ** 3 * wei = babbage = yacto_eth = yETH
Mwei = 10 ** 6 * wei = mwei = lovelace = pico_eth = pETH
Gwei = 10 ** 9 * wei = gewi = shannon = nano_eth = nETH
micro_eth = 10 ** -6 * eth = uETH = szabo = microeth
milli_eth = 10 ** -3 * eth = mETH = finney = millieth 

block = [BlockIncrement] = Block
EPB = ETH / block
PB = 1 / block

gas_target = 15e6 / block
gas_max = 30e6 / block
gas_std = 3e5 / block 
# std estimated by eyeballing Ycharts

epoch = 32 * block
ave_block_time = 12 * s / block
ave_epoch_time = ave_block_time * epoch
base_reward_factor = 64 * ETH / epoch
year = 7174 * block
Yr = year