How Much Baseboard Do I Need? (With Calculator)
Measure the room perimeter, subtract the doors, add 10% waste, and you have your baseboard order. Here's how to do it fast.
The Basic Baseboard Formula
Baseboard is ordered in linear feet. Add up the length of every wall in the room, subtract 2.5 feet for each standard door opening, and add 10% for cuts and waste. That number is your order quantity.
For a 12×14-foot room with one door: (12 + 14 + 12 + 14) − 2.5 + 10% = 57.75 linear feet. Round up to 60 linear feet to be safe.
Use our baseboard calculator to get this number instantly — enter your room dimensions and door count and it does the math.
Waste Factor: How Much Extra to Buy
A 10% waste allowance covers normal 45-degree miter cuts at corners. If the room has lots of corners — an L-shaped room or a room with a bay window — bump that to 15%.
Baseboard comes in 8-, 12-, and 16-foot lengths at most lumber yards. Longer boards mean fewer seams, but they're harder to transport. Most contractors order 12-foot boards for standard rooms.
Always round up to the nearest board length. If you need 57 linear feet and boards come in 12-foot lengths, order 5 boards (60 feet). The offcuts come in handy for closets.
Free tool: Baseboard Calculator →
Inside vs. Outside Corners
Inside corners (the 90-degree corners most rooms have) are cut at 45 degrees and joined together. Outside corners — where the baseboard wraps around a wall protrusion — need matching miters from both sides.
Outside corners eat more material because both pieces need long miters. Add an extra foot per outside corner to your total.
Coped joints are the professional method for inside corners — one piece runs square into the wall, the other is coped (shaped) to fit over it. Coped joints hold up better than mitered inside corners as wood expands and contracts.
Baseboard Height and Profile
Standard baseboard runs 3 to 5.5 inches tall. Taller baseboards (5.5 to 7 inches) look more traditional and formal; shorter profiles suit contemporary and modern spaces.
Profile matters for matching. If you're adding baseboard to an existing room, bring a small cutoff sample to the lumber yard — profiles vary by manufacturer and era.
Colonial, ranch, and craftsman are the three most common profiles. Colonial has a curved top edge; ranch is flat; craftsman is flat with a slight relief. Colonial is the most widely stocked.
Labor and Installation Cost
Professional baseboard installation typically runs $1.50 to $3.00 per linear foot for labor, not counting material. A standard 250-square-foot room costs $150 to $300 in labor.
Material cost ranges from $0.80 to $3.00 per linear foot depending on wood species and profile. MDF baseboard is the most affordable; solid oak or poppy are at the high end.
DIY installation is straightforward with a miter saw and a nail gun. Rent a compressor and finish nailer for the day if you don't own one — it's faster and cleaner than hand-nailing.
Related free calculators
Stop estimating by hand
ProBuildCalc scans a room with your iPhone's LiDAR and builds the square footage, material takeoff, and a blueprint automatically.
FAQ
- Do I measure baseboard in linear feet or square feet?
- Linear feet. Baseboard is a long narrow molding, so you measure the total length of wall coverage, not area. Add up your wall lengths and subtract for door openings.
- How much extra baseboard should I buy?
- Add 10% for waste on a standard rectangular room. Add 15% for rooms with many corners or angles. Always round up to the nearest board length.
- Do I subtract for door openings when calculating baseboard?
- Yes. Subtract 2.5 feet for each standard 32- or 36-inch door opening since baseboard doesn't run across the doorway.
- What's the difference between baseboard and base molding?
- They're the same thing. Baseboard, base molding, and floor molding all refer to the trim that runs along the bottom of walls where they meet the floor.