Furniture Dimension Calculator
Standard heights and depths for tables, desks, chairs and counters, and a check on a dimension you already have.
At a glance
- What you enter
- What are you building?, Height of the person using it, A height you already have, A depth you already have
- What you get
- Suggested height, Suggested depth, Suggested minimum width, Your height is inside the standard range, Difference from the suggestion, Change needed to reach the range, Depth comment
- Formula shown
- Yes, every step, right below your results.
- Cost and privacy
- Free, no account needed, and nothing you type is stored.
See worked examples ↓ Read the FAQ ↓ Share this calculator ↓
Results are estimates for general information only, always verify with a professional or official source before acting on them.
How to use the Furniture Dimension Calculator
- 1 Enter What are you building?
- 2 Enter Height of the person using it (in), Used for a note on proportion. Leave blank if the piece is for general use.
- 3 Enter A height you already have (in), The top height or the seat height of the piece you are checking.
- 4 Enter A depth you already have (in), The depth of the top or the shelf.
- 5 Press Calculate. You get Suggested height, Suggested depth, Suggested minimum width, Your height is inside the standard range, Difference from the suggestion, Change needed to reach the range, Depth comment, and every intermediate step stays visible under "How is this calculated?"
- 6 Change one number at a time to see what moves the result, that is usually the most useful thing a calculator can tell you.
Worked examples
Real numbers run through this calculator. Open any example to load it into the form above and change it.
A dining table at 30 inches
Checking a standard 30 inch dining table top.
You enter
- What are you building?
- 1
- Height of the person using it
- 68 in
- A height you already have
- 30 in
- A depth you already have
- 36 in
You get
- Suggested height
- 30.00 in
- Suggested depth
- 36.00 in
- Suggested minimum width
- 36.00 in
- Your height is inside the standard range
- 1
- Difference from the suggestion
- 0.00 in
- Change needed to reach the range
- 0.00 in
- Depth comment
- 0
30 inches sits at the top of the 28 to 30 inch range.
A coffee table that is too low
A coffee table at 14 inches being checked against the standard range.
You enter
- What are you building?
- 4
- Height of the person using it
- 68 in
- A height you already have
- 14 in
- A depth you already have
- 20 in
You get
- Suggested height
- 18.00 in
- Suggested depth
- 20.00 in
- Suggested minimum width
- 42.00 in
- Your height is inside the standard range
- 0
- Difference from the suggestion
- -4.00 in
- Change needed to reach the range
- 2.00 in
- Depth comment
- 0
Below the 16 to 18 inch range, so it will feel low next to a sofa seat at 18 inches.
A bar stool for a 36 inch counter
A stool with a 30 inch seat being checked for a kitchen counter.
You enter
- What are you building?
- 6
- Height of the person using it
- 68 in
- A height you already have
- 30 in
- A depth you already have
- 0 in
You get
- Suggested height
- 30.00 in
- Suggested depth
- 16.00 in
- Suggested minimum width
- 16.00 in
- Your height is inside the standard range
- 1
- Difference from the suggestion
- 0.00 in
- Change needed to reach the range
- 0.00 in
- Depth comment
- 0
A 30 inch seat suits a 42 inch bar, not a 36 inch counter, which wants 24 to 26.
Guides that go with it
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Frequently asked questions
How high should a dining table be?
How high should a desk be?
How high is a kitchen counter and what stool goes with it?
How deep should a bookshelf or shelf be?
How much table edge does one person need?
Terms used here
Short, plain-language definitions of the words this calculator uses.