How will Bitcoin be inflation free?
Inflation is newly mined coins added to circulating supply. When block rewards become zero and transaction fees are the only incentives for miners, there won't be any new coins added to circulating supply.
According to https://www.viewbase.com/inflation (In last 24 hours):
1031 BTC mined
Circulating Supply of Bitcoin is 18,504,668 BTC
% of newly mined coins(24h) is 0.006%
Annualized inflation rate is 2.03%