Baby Grand Piano Dimensions and Room Fit

How to use the Baby Grand Piano Dimensions tool

1. Open the “Piano” list and pick a model, such as the Steinway Model S. To enter your own sizes, choose “Other grand piano (enter the sizes)” or “Other upright piano (enter the sizes)”.
2. If you chose an Other option, type the length of the grand, or the depth of the upright, in “Length of the grand, or depth of the upright (in)”. Fill in “Width (in)” and, if you know it, “Height (in, optional)”.
3. Set “Extra floor space around the piano (in)”. It starts at 0 and is added on every side before the room check. No maker gives a figure for the bench, the player or the open lid, so enter your own number to allow for them.
4. Type your room size in “Room length (leave empty to skip)” and “Room width”. Choose the unit in “Room size unit”: feet, inches or centimeters. Leave both room boxes empty to skip the room check.
5. Read the four results: “Size”, “Floor space of the case”, “What kind of piano by size” and “Does it fit your room”.
6. To load a common setup, press a preset button: “Steinway Model S”, “Steinway Model B”, “Yamaha C3X, 36 in around” or “Yamaha U1 upright”.

A warning appears for an unusual size or when the room is smaller than the case plus the extra space. An error appears if no piano is picked or a size is zero or not a number.

How is a piano’s size measured?

A dealer’s guide names grand pianos by their length and vertical pianos by their height. The floor space of a grand is its length multiplied by its width, and the floor space of an upright is its width multiplied by its depth.

For example, the Steinway Model S is 5 ft 1 in (154.9 cm) long and 57.8 in (146.7 cm) wide, so its case takes about 24.5 sq ft. The Yamaha U1 upright is 60 in wide and 24 in deep, which is 5 ft x 2 ft, or about 10 sq ft. The tool calculates these figures from the sizes you choose or type in.

Makers do not always use the same terms. Yamaha lists its grands in centimeters and calls the length “depth”. The Steinway pages read do not list heights for its grands, so the tool shows a dash for them. Sizes can also change between model years, so check the maker’s current page before you buy.

The kind of piano is named from typical size ranges taken from one piano dealer’s guide. Grands are sorted by length: petite (4 ft 5 in to 4 ft 10 in), baby (4 ft 11 in to 5 ft 6 in), medium (about 5 ft 11 in), parlor (5 ft 9 in to 6 ft 1 in), semi-concert or ballroom (6 ft 2 in to 7 ft) and concert (about 9 ft). Verticals are sorted by height: spinet (about 37 in), console (40 to 43 in), studio (45 to 48 in) and upright (50 to 60 in). These ranges overlap and leave gaps, so a size between two ranges is shown as falling between them. The Steinway Model M, at 5 ft 7 in, falls after baby grand and before parlor grand. Dealers draw the lines differently, so treat the label as a guide.

How does the room check work?

The room check compares the long side of your room with the long side of the piano’s case plus the extra space on each side. The result is calculated from your inputs, and the tool then reports whether the piano fits.

The extra space is added on every side before the check, so it can change the answer. The Yamaha C3X is 6 ft 1.2 in long. With 36 in of extra space on every side, it needs 12 ft 1.2 in x 10 ft 10.7 in, which fits a 20 x 15 ft room. A Steinway Model D, at 8 ft 11 3/4 in long, does not fit an 8 x 6 ft room. The case size does not include the bench or the open lid, so add room for those yourself.

Sources (checked 19 October 2026): Steinway & Sons, Model S · Yamaha, CX series specs · Yamaha, U series specs · Kawai America, grand piano sizes · Merriam Music, piano types and sizes

Worked examples

Calculated by the tool above; open it with the same values to see each step.

Frequently asked questions

What are the dimensions of a baby grand piano?

Baby grands are sorted by length, from 4 ft 11 in to 5 ft 6 in in one dealer’s guide. The Steinway Model S, a baby grand, is 5 ft 1 in long and 57.8 in wide. Lengths for the same model can vary slightly between makers, so check the maker’s current page.

What are upright piano dimensions?

Upright sizes are given by height, width and depth. The Yamaha U1 is 48 in high, 60 in wide and 24 in deep, which is a studio piano by height. Its case floor space is about 10 sq ft. Yamaha’s uprights b1, b2 and b3 are listed in centimeters.

Does the tool include the bench or the open lid?

No. The case size does not include the bench, the player or the open lid. The “Extra floor space around the piano (in)” box starts at 0, and you can enter a figure to allow for these items. No maker gives a fixed amount for them.

Why do piano sizes differ between sources?

Each maker publishes its own figures, and sizes can change between model years. Piano types also come from ranges that overlap, so the same length can get a different label from another dealer. Compare the tool’s numbers with the maker’s current page before you buy or move a piano.

Is my room data uploaded anywhere?

No. The tool runs in your browser, and nothing is uploaded. You can use it without signing up.

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