Cheapest Currencies In The World, According To Forbes India 2024 Iranian Rial: As of August 19, it stood at 42105.00 against $1 Vietnamese Dong: On August 19, it touched 24980 against $1 Sierra Leonean Leone: As of August 19, it stood at 22,439.37 against $1 Lao/Laotian Kip: Touches 22071.02 against $1 on August 19 Indonesian Rupiah: Hit 15581.10 against $1 on August 19