When stating numbers or figures, it's sometimes necessary to give an approximate or estimated amount. In these situations, there are several synonyms for the phrase "give a rough figure for" that can be used to convey the same idea in different ways. Some of these synonyms include "estimate," "guess," "roughly calculate," "ballpark figure," "approximate," "guestimate," "approximation," "rough calculation," and "ballpark estimate." These synonyms can help to add variety to your language and allow you to tailor your message to the specific context of your audience. Whether in business, finance, or everyday conversation, having a range of synonyms at your disposal can come in handy when communicating numerical values.