How to Measure Square Footage for Flooring?
To measure square footage for flooring, multiply the room’s length by its width to get the area in square feet. For irregularly shaped rooms, divide the space into smaller rectangles, calculate each area, and sum them up. Add 10-15% extra to account for waste and future repairs. Use E&K’s calculator to convert square footage to linear feet.
Reclaimed wood flooring brings history, warmth, and character into any space, but it is more challenging to source and takes time to prepare. It’s a one-of-a-kind material, but that uniqueness means you’ve got to plan. No guesswork here. Before you place an order and learn how to calculate square feet, you’ll need accurate measurements. Unlike mass-produced flooring, reclaimed wood can vary in length and width, and availability may be limited. This guide walks you through measuring wood, accounting for obstacles, and calculating how much material you need, including an overage to cover layout changes, the occasional imperfect board, and the unexpected. We have a collection of tools that will help you make these measurements: Square Foot Calculator and our Square Feet to Linear Feet Calculator
Start with the right gear. Accuracy matters! A small measuring error can become a headache and throw off further calculations. Having the right tools keeps things efficient and accurate from the start. A professional tape measure is where to start—retractable for long walls, folding, or a laser distance meter. Use a notebook or smartphone to track your numbers clearly as you go. If your room has odd angles or nooks, graph paper can help you sketch it out. Our Flooring Square Feet Calculator makes translating your measurements into an order simple.
Tape measure (retractable or laser)
Notebook or smartphone
Graph paper (optional, helpful for odd-shaped rooms)
Tip: Accuracy at this stage saves time, money, and hassle later.
Step 2: Measure Room Dimensions
Stick to simple math: length × width. That’s the basic formula for square footage, and it works for most rooms—just measure the longest wall and the one perpendicular to it, then multiply. But real spaces aren’t always that clean. You might have bump-outs, alcoves, or angled walls. In that case, divide the room into smaller rectangles or triangles and calculate each section separately. Our Square Foot Calculator allows you to add multiple rectangles and adds them up for you.
Once you have all the sections, add them all together for a total. The goal isn’t perfection—it’s getting close enough that your flooring order covers the entire space without major over- or underestimating. Keep it organized, double-check your work, and don’t skip the corners!
For rectangular rooms: measure both walls, multiply.
Irregular rooms? Break them into rectangles, triangles, or odd shapes and measure each one.
Example:
Room: 20 ft × 15 ft = 300 sq ft
Alcove: 5 ft × 3 ft = 15 sq ft
Total: 315 sq ft
Tip: Oddly shaped room sections add up. Don’t skip them.
Step 3: Account for Waste and Pattern Cuts When Measuring Wood
You’ll trim boards to fit corners, match patterns, and work around walls or cabinets, but sometimes more wood is necessary to complete the job. We suggest adding 10–15% overage. This extra material covers the inevitable waste from cuts, miscalculations, and adjustments during installation. Reclaimed wood, in particular, isn’t always uniform—some boards may have knots, cracks, or wear that you’ll want to cut around or avoid entirely. If you’re installing in a complex layout like herringbone or diagonal, the waste increases due to angled cuts and alignment adjustments. When measuring wood, the overage gives you the flexibility to maintain your design without running short. Always round up—better to have a few boards left over than to halt the job waiting on more.Basic layout: 10% extra.
Diagonal or patterned layout: up to 20%
315 sq ft × 1.10 = 346.5 sq ft
315 sq ft × 1.15 = 362.25 sq ft
Final range: 347–362 sq ft
Tip: Better to have too much than run short mid-project.
Step 4: Factor in Obstacles and Features
For built-ins, fireplaces, stairs, and kitchen islands—measure around them. These fixed features don’t need flooring underneath, so subtract their square footage from your total. Start by measuring their length and width, multiply to get the area, and then deduct that from the room’s overall square footage. It’s a small step that can make a difference, especially in kitchens or living rooms with large permanent structures. Don’t forget transition areas like doorways and hallways—if flooring continues into another space, you’ll want to include that too. Taking the time to factor in these details means less waste, fewer surprises, and a better fit overall.
Subtract areas where the flooring won’t be present
Check door thresholds and transition zones
Note if the flooring runs into hallways or adjoining rooms
Tip: Know your subfloor—it affects material needs and installation.
Step 5: Convert to Linear Feet (optional)
Reclaimed flooring is typically sold in square feet. We convert this to linear feet to fulfill the order. Once the wood arrives, we recommend you also do this calculation to ensure you have received the right amount of wood.
This section will show you how to calculate linear feet, but our team is always happy to help. If you have any questions, include them when you fill out the form below or on our contact page.
Linear Feet = (Square Feet × 12) ÷ Board Width (in inches)
Let’s say you need to cover 400 square feet with boards that are 5 inches wide. Since linear feet measure the total length of boards regardless of width, the narrower the board, the more linear feet you’ll need. In this instance, you would need 960 feet of 5″ boards.
This calculation can be a little cumbersome, and that’s where our Square Feet to Linear Feet Calculator comes in—just plug in your square footage and board width, and it does the math for you. Calculating linear feet is not necessary for ordering, but it is useful to check that you received the right amount of wood when it arrives, and if you ever need to do a spot tally.
Always confirm with our team, since different products may be bundled or sold with slight variations in width or usable yield.
You need 400 sq ft of flooring and the boards are 5 inches wide.
The calculator converts that to the right number of 960 linear feet.
Tip: Board width matters. Double-check with your supplier before finalizing.
Step 6: Double-Check Before Ordering
Review everything. Are your numbers consistent? Did you measure each room the same way? Did you subtract for built-ins and add extra for waste? Review your notes and sketches to catch anything that might throw off your order—small mistakes can mean coming up short, which can cause delays, or ending up with too much reclaimed wood.
If you’re planning a specific layout like herringbone, chevron, or mixed-width planks, check with our team about how much overage you should account for. Reclaimed wood varies—not just in size and length, but in availability. Let us know your layout, board width preferences, and the character you are want to achieve. We will help fine-tune your order, suggest substitutes if needed, and ensure that you’re getting the right material for your project.
Tip: Herringbone, chevron, or mixed-width layouts all affect the amount you’ll need. Flag that early.
Conclusion:
Measuring doesn’t need to be complex. Take it one step at a time: start with the basics—length and width of each room. Then break down irregular spaces into smaller, manageable sections. Subtract the square footage of areas you won’t cover. Once you have your total, add 10–15%.
Double-check your measurements. Keep your notes organized. Use our calculators if you need help converting to linear feet. Accuracy here means efficiency down the road—no last-minute orders, no delays, and enough material to prevent re-orders.
If you’re ever unsure, reach out. Our team knows reclaimed wood inside and out and can help you translate your measurements into exactly what you’ll need to get the job done right.
Measure room area
Subtract obstacles
Add 10–15% extra
Convert to ordering quantities (optional)
Whether you’re measuring a single room, planning a full renovation, or trying to decide between board widths or patterns, we’re here to help. Reclaimed wood can be unpredictable—board sizes vary, availability shifts, and no two projects are exactly alike. That’s where our experience comes in.
We can walk you through the ordering process, help double-check your measurements, convert square feet to linear feet, and make sure you’ve accounted for everything from waste to layout style. We’ve helped thousands of customers get it right the first time—and we’re happy to do the same for you.
Use the form below, or reach out to us on our contact page, and we will be happy to help you with your reclaimed wood project.
