Grams to cup conversion accuracy for

I do not know if the recipe writer will be willing or able to convert from weight to volume. Most of the people freely uploading their treasured recipes are not kitchen scientists- and don't provide that kind of service. However, you can try to do it yourself. May I suggest you use one of the converters on the internet like this one - https://www.allrecipes.com/article/cup-to-gram-conversions/

I'd also highly recommend you invest in a relatively inexpensive scale. Amazon has fairly decent ones available for under $20. Baking is much more accurate and dependable when you do it by weight, as opposed to volume in cups.