Formal:
* Il nous faut: This is the most formal and literal translation.
* Nous avons besoin de: This is a more common and less formal way to say it.
Informal:
* On a besoin de: This is a very informal way to say it, and it's often used in spoken French.
Here are some examples:
* Il nous faut un nouveau bureau. (We need a new desk.)
* Nous avons besoin de plus de temps. (We need more time.)
* On a besoin de café. (We need coffee.)
Remember to choose the appropriate translation based on the context and the level of formality you need.