Mujhe yaqeen hai ke yeh kaam karega / is se hojayega

How to say “Mujhe yaqeen hai ke yeh kaam karega” in English

When you want to say “Mujhe yaqeen hai ke yeh kaam karega” (or “is se hojayega”) in English, the natural, everyday way is “I'm sure this will work”. It fits everyday talk.