How Do You Measure the Cubic Feet of a Fridge?

The yellow EnergyGuide label lists the capacity in cubic feet. It is often still stuck inside the door, folded into the manual, or taped to the back of the unit.

The rating plate carries the model and serial number and often the interior storage capacity. Its spot varies by configuration. On many top-freezer, bottom-freezer and French-door cabinets it sits inside the left wall. On many side-by-sides it is inside the right wall. Some built-ins put it on the top frame inside the door. On older units look behind the crisper drawers, on the interior ceiling, on the door frame edge, or on the rear panel.

Newer fridges carry a QR code that opens the maker's spec page. The model number alone is enough too: it leads to the spec sheet, the manual, or the retailer listing, and the purchase confirmation email usually has it. If the label and the plate are both gone, measure.

1. Empty the compartment and lift out the shelves and drawers you can remove. Leave fixed parts in place.
2. Measure the interior width at the widest point, wall to wall.
3. Measure the interior height floor to ceiling, skipping the light housing and any control box that hangs down.
4. Measure the interior depth from the back wall to the inner door line.
5. Multiply the three figures in inches, divide by 1,728, and repeat for each compartment. Add the compartments for the total.

A fresh-food cavity 28 inches wide, 40 inches high and 24 inches deep comes to 26,880 cubic inches, or about 15.6 cu ft. A freezer drawer 28 by 12 by 24 inches comes to about 4.7 cu ft. The fridge totals about 20.3 cu ft. Round the result to one decimal place, the way capacity is reported.

Working in other units: centimeters divide by 28,316.8, meters multiply by 35.315, and cubic feet to liters multiply by 28.317.

Width goes at the widest point, which is usually at the shelf supports rather than at the back. Height runs floor to ceiling of the cavity, not to the underside of the light or the ice-maker housing. Depth runs from the back wall to the inner door line, and this is where most measurements go wrong.

The rated figure is taken to the inner door line and includes the door bins. A tape measure that stops at the cabinet face reads low by a cubic foot or two. That is the most common reason a careful measurement does not match the sticker.

The interior is not a clean box either. Compressors, evaporator housings, air ducts and curved liners all eat into it, so a box calculation is an approximation, not a replica of the rated number.

Top-freezer

Two stacked boxes. Measure each separately. The freezer is typically 4 to 5 cu ft of the total.

Bottom-freezer

Pull the drawer fully out and measure the bin interior. The ice-maker housing and the space behind the drawer are dead volume.

Side-by-side

Measure each narrow column separately, from the outer wall to the center divider. Take depth carefully: these cabinets are deep and narrow.

French door

A full-width fresh-food cavity above a freezer drawer. Measure the two as separate boxes.

Four-door and flex-zone

The convertible compartment is a cooler compartment and counts at full value toward total volume. A fridge that switches between fridge and freezer use has a rated volume for each mode, and the label reflects the mode the standard treats as the more demanding one.

Counter-depth

The same interior method, just less of it. At the same width, a counter-depth cabinet holds several cubic feet less than a standard-depth one.

Mini and compact

Small cavities, so measure in inches. The model name usually carries the capacity: the 1.7, 3.1 and 4.4 in model names are cubic feet.

Beverage fridges

A single small cavity, often with no freezer, so one measurement is the whole job.

The rated capacity on a US spec sheet is total refrigerated volume determined under a standard written for energy labeling, not for food storage.

Under that method, shelves, removable partitions, containers, automatic ice makers and interior light housings are treated as not in place. Their volume counts toward the total even though you can never put a carton there. Enclosed control housings, evaporator space and air ducts are deducted. The method also follows the exact shape of the insulated walls, including depressions and projections, so it is a three-dimensional scan rather than a box.

The practical result: a tape-measure box calculation usually lands below the sticker by one to three cubic feet, because the sticker includes shelf, ice-maker and light volume you cannot fill. Consumer Reports measured gaps between claimed and usable capacity of up to about a third, with top-freezer models showing the smallest gap and French-door models the largest.

Treat any usable-space estimate as an estimate. There is no fixed percentage deduction that applies across the category.

Typical total capacity by type, so you can tell at a glance whether you measured the inside or the outside:

If your math says 45 cu ft, you measured the outside of the box.