How to Measure a Room for Furniture
Sketch the room, measure the walls, ceiling, and fixed features, check clearances, tape the layout on the floor, and measure the delivery path before you buy furniture.
You will end up with a scale sketch of the room, the dimensions of every piece you plan to buy, a layout tested at full size on the floor, and a measured path from the front door to the room. Together they tell you, before you order, whether a piece fits the room, leaves space to walk around it, and makes it through the doorways.
The tools are a tape measure, a pencil, graph paper, and a roll of painter's tape. Measure before you buy. A sofa that does not fit has to be wrapped back up, carried back out, and collected, and not every order can be returned (step 8).
A retractable tape measure (at least 25 feet) Pencil and graph paper (or a notepad) Painter's tape Smartphone camera A laser distance measure (optional but helpful for long walls and solo measuring)
Gather your measuring tools
Use a retractable tape measure at least 25 feet long. Lay out a pencil, notepad, and graph paper for the floor plan, and set the scale at one square per foot. Keep your phone camera handy to photograph outlets, vents, and trim, so you can check them later without going back to the room. Put a roll of painter's tape aside for step 7. A laser distance measure is optional, and FAQ 7 below covers when it beats a tape.
Sketch a rough floor plan
Stand at the room entrance and draw the shape of the room as if you were looking down from above. Move in one direction around the room, labeling each wall. Use your graph paper for easy scaling. Mark the approximate locations of doors (including which way they swing), windows, electrical outlets, light switches, radiators and vents, and any built-in features like fireplaces or shelving. You do not need precise measurements yet. This is your reference map. You will fill in the numbers in the next steps.
Measure each wall
Run the tape measure along one wall, from one corner to the next, for the room length. Then repeat along an adjoining wall for the width. Place the tape flat against the baseboard and measure at least twice per wall. If the two readings differ, keep the smaller one, because that is the space a piece has to fit into. Write each measurement directly on your sketch. For L-shaped rooms, break the space into two rectangles and measure each one separately. Then confirm the overall dimensions by measuring the full length and width at the widest points. For alcoves and bay windows, measure the opening width, internal depth, and internal width as separate numbers.
Good to know: Baseboards and door trim stand out from the wall, so a piece that should sit flush against the wall ends up slightly forward of it. Measure from the face of the trim, not the wall behind it.
Record ceiling height and fixed features
Measure floor to ceiling in at least two spots, and use the lower figure for tall bookshelves, armoires, and canopy beds. A tall piece that arrives flat-packed is assembled lying down and then tipped upright, so it needs clearance for its diagonal, not just its height. An 84-inch bookcase that is 16 inches deep needs about 85.5 inches to stand up. Now go back to your sketch and mark the exact position and size of every fixed feature. Mark outlets, vents, and radiators, because a piece pushed against one blocks it. For each window, record the height of the sill above the floor, which is the limit for anything that stands under it. For each door, record the swing direction with a small arc. A door sweeps a quarter circle as wide as the door itself, so a 32-inch door needs a clear 32-inch radius across its whole swing. Keep furniture out of that arc.
Measure the furniture you plan to place
Record the width, depth, and height of every piece, whether you are measuring existing furniture or reading dimensions off a product page. Measure at the widest, deepest, and tallest points, which means including sofa arms, dresser handles, and any overhang. For a sofa or armchair, also record the diagonal depth if the product page lists it (FAQ 1 below). Use each piece's own numbers and not a typical size for its type. A bed frame is larger than its mattress, so measure the frame. The 60 by 80 inches of a queen mattress, listed in our guide on how to choose a mattress, is the least a queen frame can be. For a dining table, allow 24 inches of table edge per diner, the width the National Kitchen & Bath Association's kitchen planning guidelines give each seated diner. A 72-inch table seats three along each side, six in all.
Leave clearance around each piece
Check the plan for room to walk, sit, and open things. For the paths people walk, leave at least 30 inches, and 36 inches at doorways so two people can pass. Leave 36 inches or more in front of a dresser or any other drawer unit. Those three figures come from the University of Arkansas 4-H interior design packet. To check a dresser against the real thing, pull out the deepest drawer and measure from the wall to its front. Crate & Barrel's measuring guide gives a smaller figure, 18 to 24 inches of walking room around furniture. Use that only for a gap you pass through now and then, such as the far side of a bed, and keep the 30 inches for the paths you use every day. Put the coffee table 15 to 18 inches from the sofa (FAQ 5 below). Around a dining table, the National Kitchen & Bath Association's guidelines from step 5 give 32 inches from the table edge to the wall where nobody passes behind the seated diners, at least 36 inches for someone to edge past them, and at least 44 inches for someone to walk past. Keep every door's swing arc from step 4 clear, closet doors included. A sofa cannot sit flush against a wall that has a baseboard, an outlet, or a vent behind it, so check your photos and leave the gap they need. If anyone in your home uses a wheelchair or walker, plan with the wider figures in FAQ 2 below.
Good to know: Check the distance between seats as well. The Arkansas packet says to group chairs and sofas no more than 8 feet apart, so people can talk in a normal tone of voice. Measure between the seats on your plan.
Test your layout with painter's tape
Take the painter's tape and outline the footprint of each piece on the floor, using the exact width and depth you recorded in step 5. Then walk the paths between the outlines with the tape measure and check each gap against step 6. Open every door and drawer near an outline to make sure nothing collides. Leave the tape down for 1 or 2 days and use the room as usual. If you keep stepping on an outline, that piece is too big for the spot or in the wrong place.
Measure the delivery path
A piece that fits the room still has to get into it. Before you order, measure every passage from the delivery truck to the room. The checks below follow Crate & Barrel's guide to measuring for delivery and RH's furniture delivery guide. Measure the width and height of every doorway, starting with the front door, and check how far each door opens, because a door that stops short narrows the gap. Measure the width of each hallway. At every turn, measure the distance from the doorway to the wall opposite, which is the room a long piece has to swing in. On stairs, measure the width between the handrails or posts, the height from the top and the bottom step to the ceiling, and any landing where the piece has to turn. For an elevator, measure the door opening, the interior height, and the distance from the door to the back wall. Note any low-hanging light fixture along the way. Then compare those numbers with the piece, using the rule in FAQ 6 below. For a path that is too tight, choose a piece that ships in sections, such as a sectional sofa.
Heads up: Measure the delivery path before you order, not when the truck arrives, and read the return policy at the same time. RH's delivery guide, for example, says returns are not accepted for special orders and that making sure a piece fits through doorways, stairways, hallways, and elevators is the customer's responsibility.
If a piece fails the tape test in step 7, look for the same piece in a smaller size before you rearrange the room around it. If it fits the room but not the delivery path, ask the retailer before you order whether the legs, arms, or back come off for delivery, or choose a version that ships in sections. If two readings of the same wall keep disagreeing, measure again with the tape flat against the baseboard and a second person holding the far end. Keep the sketch and the measurements after the furniture arrives, because the same numbers place the next piece. Once the sofa or headboard is in, our guide on how to hang a picture uses its height to set where a frame goes above it.
Questions we get asked about this
Answers from experience, not a textbook.
Take off any loose pillows. Lay a straightedge, such as a yardstick, across the end of the sofa from the highest point of the back frame to the front of the arm. Then measure from the bottom back corner of the sofa to the point where your tape meets the straightedge. Fairway Furniture's measuring guide gives this method, and says the figure is what lets a sofa pivot through a narrow entryway. That is the check in FAQ 6 below for a piece that has to come through a doorway at an angle. Check the product page first, because Crate & Barrel and RH both list the diagonal depth of their sofas. For a bookcase or dresser, the same guide measures a diagonal height the same way, corner to corner at the widest point.
Either one needs wider paths than the 30 inches in step 6. The ADA standard for an accessible route is 36 inches of clear width, and the same standards give 60 inches as the diameter of the circle a wheelchair turns in. The ADA Standards govern government buildings, businesses open to the public, and commercial buildings, not a private home, but they are the numbers to plan around. For a dining table, the National Kitchen & Bath Association's access standard is 36 inches from the table edge to the wall where nobody passes behind the diners, and 60 inches where a person in a wheelchair has to pass behind them.
It is a rule of thumb for proportion. Pick a sofa about two-thirds the length of the wall it sits against, and a coffee table about two-thirds the length of the sofa. We could not find a design standard or a study behind it, so use it to narrow down sizes, and let the clearances in step 6 and the tape test in step 7 decide.
Break the room into rectangles and measure each one separately, as step 3 does for L-shaped rooms and alcoves. For rooms with sloped ceilings, record the height at both the lowest and highest points plus the distance from the wall where the slope begins.
Put it 15 to 18 inches from the front of the sofa. That is the distance the University of Arkansas 4-H interior design packet linked in step 6 gives, and its reason is knee room. The upper end of the range keeps the table within reach of the seat. For height, we recommend a table about level with the sofa's seat cushions.
Measure the clear opening of the doorway, which is narrower than the door itself, with the door open as far as it goes. A piece goes straight through when its depth is less than the width of the opening or, laid on its back, when its height is. If neither is, the piece has to come in at an angle. RH's delivery guide gives two conditions for that. The piece's width has to be less than the doorway's height, and its diagonal depth (FAQ 1) has to be less than the doorway's width. A thin, flat piece that is taller than the doorway, such as a tabletop or a headboard, passes tilted if it is shorter than the doorway's diagonal. A doorway 32 inches wide and 80 inches high has a diagonal of about 86 inches. Run the same checks on every hallway, staircase, and elevator on the path (step 8).
A tape measure is the easier tool for furniture, window openings, and anything you can hook the end onto. A laser measure is better for room-length walls, because it needs a surface to bounce off rather than someone holding the other end, and it does not sag across open space. A laser cannot measure the depth of a sofa standing in the middle of a showroom, so you still need a tape.
Use an app to test layouts, and take the measurements yourself. A room planner app lets you draw the room to scale and move furniture around on screen. Phone measuring tools give estimates. Apple says of the Measure app on iPhone that its measurements are approximate, and that it works best on well-defined objects 2 to 10 feet away. Enter the numbers from your tape or laser into the app, then check the layout against the taped outlines in step 7.