Don't Buy the Wrong Size!
Calculate Your Barn Door Specs in 3s

Supports Single, Double & Bypass · Get Custom Hardware Recommendations

Start Calculating Now

Size Calculator

INCH CM

1 Installation Type

2 Door Opening Dimensions

Inside width of door frame (or outer trim width)

From floor to top of opening/trim

3 Preferences

Complete Measuring Guide

Follow our professional 5-step process to ensure perfect measurements every time. Accurate measurements = No returns + Perfect fit!

Visual Measurement Reference

WIDTH (A)
HEIGHT (B)
0.5"-1" Gap
OVERLAP
OVERLAP
Measurements
Overlap Area
Floor Gap
Clearance
1

Measure Opening Width (Dimension A)

Measure the width of your door opening from the inside edge of the trim on one side to the inside edge of the trim on the opposite side.

Pro Tip:

  • Take measurements at three points: top, middle, and bottom
  • Use the smallest measurement to ensure proper fit
2

Measure Opening Height (Dimension B)

Measure from the floor (or bottom of opening) to the top of the door frame or trim.

Pro Tip:

  • Measure at left, center, and right positions
  • Record the smallest height measurement
3

Calculate Required Door Size

Your barn door needs to be larger than the opening to provide proper coverage and privacy.

Standard Formula:

Door Width = Opening Width + (2 × Overlap)

Door Height = Opening Height + 1-2 inches

Example Calculation:

Opening: 36" wide × 80" tall
Overlap: 4" per side (recommended)
Result: Order 44" × 82" door

4

Measure Wall Space & Clearance

Barn doors slide along the wall, so you need adequate space for both the track and the door when open.

Clearance Above

You need at least 6 inches (15cm) from the top of the opening to the ceiling.

Side Wall Space

Ensure the wall space is clear and equal to the width of the door.

5

Determine Track Length

  • Single Door Track:

    Typically 2 × Door Width.

  • Double Door Track:

    Typically 4 × Single Door Width.

6

Check for Obstructions & Wall Structure

Before finalizing your order, verify there are no obstacles and your wall can support the hardware.

Check for Obstructions:

  • Light switches or electrical outlets
  • Ceiling fans or hanging lights
  • HVAC vents or returns
  • Baseboards or crown molding

Wall Structure:

Critical: Barn door hardware must be mounted to wall studs or a solid backing board.

Essential Measuring Tips

Use the Right Tools

Always use a steel tape measure for accuracy. Cloth or plastic measures can stretch. A laser measuring tool is ideal for precision.

Measure Twice, Order Once

Double-check all measurements before ordering. Have a second person verify your numbers.

Thick Trim? Add a Header Board

If your door trim is thicker than 5/8", you'll need to install a header board to push the door further from the wall and prevent rubbing.

Need Help? We're Here!

Unsure about your measurements? Our expert team offers free consultation.

Common Measuring Mistakes

Forgetting Overlap

Ordering a door the exact size of your opening will leave gaps. Always add overlap.

Ignoring Wall Space

Not checking if you have enough wall space for the door to slide open completely.

Single Measurement

Taking only one measurement instead of three. Openings are rarely perfectly square.

FAQs About Barn Door

Q1 Do barn doors actually save space?

A: Yes, but they trade "swing space" for "wall space." Since they don't swing open, you save floor space, which is great for small rooms or narrow hallways. However, you must have empty wall space next to the opening.

Q2 Do barn doors block sound effectively?

A: Not as well as traditional swinging doors. Because barn doors hang over the opening rather than fitting inside the frame, there is always a small gap between the door and the wall.

Q3 Can you lock a barn door?

A: Yes, but you need special hardware. Standard door knobs don't work. You will need to install a hook latch (privacy hook) or a teardrop latch.

Q4 Are barn doors a good idea for bathrooms?

A: It depends on your privacy comfort level. They are very popular for master bathrooms (ensuites). However, due to the "gap", they do not provide a perfect seal against odors or sounds.

Q5 How much wider should a barn door be?

A: At least 2 to 4 inches wider. To ensure privacy and minimize the side gaps when looking from an angle, the door should overlap the opening.

Q6 Do barn doors need a bottom track?

A: No, but they need a "Floor Guide." You do not need a trip-hazard track running across the doorway. Instead, a small, discreet floor guide is installed on the floor at the edge of the door opening.

Q7 Do I need a header board?

A: Highly recommended. Barn doors are heavy. If your studs do not line up perfectly with the track holes, you cannot anchor it securely. Installing a wooden header board first ensures the door is safe.

Q8 How far does it stick out?

A: Usually about 2 to 3 inches. This includes the door thickness and hardware gap. Ensure this protrusion won't hit any baseboards or light switches.