I have this refrigerator and it still works fine. I would like to know it's total cu ft capacity. Also what the refrigerator and freezer each cu ft capacity is.

Does ir look the same as this FRT18?

https://www.ajmadison.com/cgi-bin/ajmadison/FRT18G6JW.html

Refrigerator Capacity: 14.13 Cu. Ft.
Freezer Capacity: 4.07 Cu. Ft.
Total Capacity: 18.2 Cu. Ft.
Width: 29 5/8 Inch
Depth: 33 5/8 Inch
Depth with Door at 90°: 59 7/8 Inch
Height: 66 1/8 Inch
No. of Shelves: 2
Gallon Door Storage: Yes
Water Dispenser: No

It is the '25' in your model number.

Total Capacity. 25 cu. ft. Refrigerator Capacity. 15 cu. ft. Freezer Capacity 10 cu. ft.

Here is the manual in case you need it.
http://kitchen.manualsonline.com/manuals/mfg/whirlpool/ed25rfxfw01_2.html?p=1

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Total Capacity (Cu. Ft.)
20.5
Refrigerator Capacity (Cu. Ft.)
15.27
Freezer Capacity (Cu. Ft.)
5.26

source
https://www.manualslib.com/manual/54236/Frigidaire-Ffht2117l-W.html?page=2#manual

Total Refrigerator Capacity 26.70 cu ft Measure Freezer Fresh Food Total Capacity Cubic Feet 7.66 cu ft 19.02 cu ft 26.70 cu ft Liters

Apparently it is an MF i and not an MF 1 (one).
Maytag MFI2265XEM Refrigerator
25.5 cu. ft. total.
Freezer 6.6
Fridge 13.6

Even though their maths is a bit funky!

http://fridgedimensions.com/refrigerators/mfi2265xem/

Measure Freezer Fresh Food Total Capacity Cubic Feet 6.60 cu ft 13.60 cu ft 25.50 cu ft Liters

After some work online...I found this advertisement buried among a bunch of other ads:
Magic Chef RB15-1A: Top-freezer style with 14.6 cubic ft. capacity and optional ice maker -- $439.

So, as I suspected the "15" in the model number is the cubic feet (total I would say). The 14.5 is probably actual, with the unit "rated" as a 15 CF.

Naturally, to find the cu. ft of the freezer, measure in inches then multiply the width X height X depth and divide that resulting rather large number by 1728 to get your cubic feet of the freezer.

You could also do the same with the refrigerated section, and add the results together and they should be near 14.5 total.

This is the information I could find.

Refrigerator Type Side-by-Side Total Capacity Cu. Ft. 21.7 Cu. Ft. Refrigerator Capacity Cu. Ft. 14.40 Cu. Ft. Freezer Capacity Cu. Ft. 7.30 Cu. Ft. Energy Star® Qualified Yes
for more information try this link.
Whirlpool Appliances for the Home Kitchen and Laundry Room

Bob

According to your model number, this refrigerator has a total capacity of 25.2 cu. ft. It has 15.4 cu. ft. in the refrigerator section and 9.8 cu. ft. in the freezer.

I would suggest starting with the easiest troubleshooting tip first. Try unplugging it for 10 minutes and plugging it back in. Most (modern) appliances will reset to factory defaults when they are unplugged for a few minutes.

This is called a 21 Cubic Ft unit.

The actual specifications are:

Freezer Capacity: 6.5 Cu. Ft.

Refrigerator Capacity: 14.5 Cu. Ft.

Total Capacity: 20.9 Cu. Ft.