Enter the total billable hours, total days in the billing period, and the number of days worked into the calculator to determine the prorated billable hours.

Prorated Billable Hours Calculator

Prorated Hours
Hours & Billing

Enter any 3 values to calculate the missing variable

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Prorated Billable Hours Formula

The following formula is used to calculate the prorated billable hours for a given period. 

H_p = (H_t / D_t) * D_w

Variables:

  • Hp is the prorated billable hours
  • Ht is the total billable hours
  • Dt is the total days in the billing period
  • Dw is the number of days worked

To calculate the prorated billable hours, divide the total billable hours by the total days in the billing period and then multiply the result by the number of days worked.

What are Prorated Billable Hours?

Prorated billable hours refer to the portion of billable hours that are allocated to a specific period based on the actual number of days worked within that period. This is particularly useful in scenarios where an employee or contractor does not work the full billing period, and the billable hours need to be adjusted accordingly. Prorating ensures that the billing is fair and accurate, reflecting the actual work done during the specified time frame.

How to Calculate Prorated Billable Hours?

The following steps outline how to calculate the Prorated Billable Hours.

  1. First, determine the total billable hours (Ht).
  2. Next, determine the total days in the billing period (Dt).
  3. Next, determine the number of days worked (Dw).
  4. Finally, calculate the prorated billable hours using the formula Hp = (Ht / Dt) * Dw.
  5. After inserting the values and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Total billable hours (Ht) = 160 hours

Total days in the billing period (Dt) = 20 days

Number of days worked (Dw) = 15 days