Oil Consumption Rate Calculator

00:00

Enter Flight Time

Oil Consumption Rate

Waiting for Calculation

OCR Formula:
OCR = Oil Uplifted (Qt) ÷ Total Time in Air (Hours)

How to Use OCR Calculator

This Oil Consumption Rate (OCR) Calculator is designed for Aircraft Maintenance Engineers, Certifying Staff and Technicians to quickly calculate engine oil consumption using flight times recorded in the aircraft technical log.

1. Enter each flight time exactly as it appears in the tech log using the numeric keypad. Example: Enter 0215 for 2 Hours 15 Minutes.
2. Press the + button after each flight sector to add it to the total Time In Air.
3. Continue entering all flight sectors until the displayed total matches the accumulated flight time.
4. Enter the total Oil Uplifted quantity in Quarts (Qt).
5. Press the OCR button to calculate the Oil Consumption Rate.
6. The calculator automatically converts the total flight time into decimal hours and applies the formula:
   
   OCR = Oil Uplifted (Qt) ÷ Total Time In Air (Hours)
7. Review the calculated OCR value displayed in Qt/Hr along with the detailed calculation breakdown.

Example:
Flight Times: 02:15 + 01:45 + 03:20 + 00:55
Total Time In Air = 08:15 Hours (8.2500 Hr)
Oil Uplifted = 3.50 Qt
OCR = 3.50 ÷ 8.2500
OCR = 0.4242 Qt/Hr