I converted my btc to fiat yesterday and it cost me nothing. our local wallet has a feature where you can convert your btc directly to your bank account or any remittance you prefer to get your money, but this is only for verified members. if you use an exchanger well it will cost you around 5% i think.
wow it is a very nice facility dude, in my local exchange, if you want to convert bitcoin to fiat and withdraw it into your bank. you must verify the data first, then your money will be charged a fee of 1%. but it was not too big