Conversion of Hours to Day UOM for Project Billing

Can we capture Labor cost with unit of measure as Hours but use a different UOM for the billing purpose?

We have a scenario where labor cost is going to be captured with Hours as a Unit of Measure. Standard job cost rates are also defined on Hourly basis.

However, as per the customer contracts the billing needs to be done by Day as a UOM and hence bill rates are available on Daily Basis.

So, there is a conversion required to convert Hours into Days for billing. Does Oracle offer any in built conversion feature to perform this exercise? Or is there any other way to perform this conversion?