diff --git a/plugins/currency/ethereum/etherscan_balance_ b/plugins/currency/ethereum/etherscan_balance_
index b00eac76..53ecd34a 100755
--- a/plugins/currency/ethereum/etherscan_balance_
+++ b/plugins/currency/ethereum/etherscan_balance_
@@ -103,5 +103,13 @@ except:
     print("JSON result error!", file=sys.stderr)
     sys.exit(9)
 
+"""
+API result is in Wei. Convert Wei to Ether (ETH).
+1     : Wei
+10^12 : Szabo
+10^15 : Finney
+10^18 : Ether
+233874700000000000000000 Wei = 233,874.7 Ether
+"""
 eth = float(etherscan_balance['result']) / 1000000000000000000
 print("{}.value {:.2f}".format(eth_address, eth));