Measuring a Bag’s Volume
To measure a bag’s volume, you must start with accurate oopkg dimensions for the bag. If you do not have these readily available, measure the bag following the guidelines in the Bag Measurement Guide.
Once you have these dimensions, calculate: Depth x Width x Height= X Cubic inches.
Then convert the cubic inches to Liters by using the following online conversion tool: https://www.metric-conversions.org/volume/cubic-inches-to-liters.htm