Plumbing Calculator
Grease Trap Sizing Calculator
Use our free grease trap sizing calculator to determine the required grease interceptor capacity for a commercial kitchen based on sink dimensions and drainage load.
Table of Contents
Sink Parameters
Results
Recommended minimum grease trap size
Grease Trap Sizing Formula
Volume (Gallons) = (L × W × D) / 231
Flow Rate (GPM) = (Volume × 0.75) / 1 or 2 Minutes
L, W, D = Sink compartment length, width, and depth in inches.
231 = Cubic inches in a gallon.
0.75 = Assumes the sink is filled to 75% capacity.
Drain Time = Typically 1 minute (or 2 minutes) for the sink to completely drain.
Standard Grease Trap Sizes
| Required Flow (GPM) | Grease Capacity (lbs) |
|---|---|
| 10 GPM | 20 lbs |
| 15 GPM | 30 lbs |
| 20 GPM | 40 lbs |
| 25 GPM | 50 lbs |
| 35 GPM | 70 lbs |
| 50 GPM | 100 lbs |