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Door/Room Replacement Size Calculator

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Please select the installed hinge groove type.
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door-panel.form.hinge-exists.label

Please check.

  • Old door frames may have bulging or warping, so you must measure at least three places (top, middle, and bottom] and input the smallest dimension to prevent pinching during installation.
  • If you plan to replace the flooring with hardwood or lay tiles over it, you must order the door with a vertical dimension reduced by at least 5mm to compensate for the increased floor height, in order to prevent dragging.
  • Since the final production width varies depending on whether Easy Hinges are used or the depth of the hinge grooves in the door frame, please be sure to check the processing type of the currently installed hinges before making a selection.
  • The handle hole height is the distance from the top of the door to the center of the latch, and it must exactly match the position of the catch hole (lock hole] installed in the existing door frame for the door to lock properly.
  • If you are replacing bathroom doors in humid environments, we recommend moisture-resistant ABS doors. Please choose according to your needs, as elaborately designed membrane doors can be vulnerable to heat and humidity.

How about this calculator?

Door/Interior Door Replacement Size Calculator, Fail-Proof Measurement and Ordering Guide

Even minute measurement errors during door replacement can lead to significant construction risks. This calculator determines the most accurate order size by considering the inner frame diameter, hinge thickness, and optimal clearance. Minimize trial and error before precise measurements and check the key reference values ​​right now for perfect, error-free door installation!

Door manufacturing size calculation formula

Please use the calculator only if the door and door frame have hinge grooves. If there are no hinge grooves, use the existing door size.

Calculation based on existing door
Custom door width = Existing door width ± Hinge groove depth (size adjusted according to hinge type]

If the existing door fits well, it is safest to use those measurements as they are.

Calculation based on actual measurement of door frame inner diameter
Door width = Minimum inner width of door frame - Clearance (usually 8mm]

Measure the top, middle, and bottom of the door frame and subtract the clearance from the smallest value. The clearance is the essential space required for the door to open and close without getting stuck.

Detailed Guide to Calculator Input Items

Please enter the measured data into the correct fields for precise door production.

  • 1. Measurement method

    Select the method that suits the situation between 'Direct measurement of existing door' or 'Measurement of door frame inner diameter'.

  • 2. Handle hole height

    It is the distance from the top of the door to the center of the handle latch. It must match the location of the catch hole in the existing door frame.

  • 3. Hinge thickness and groove machining

    The final width of the door is determined by whether Easy Hinges are used or if grooving is performed for standard hinges.

  • 4. Lower clearance

    Leave a margin of about 5 to 10 mm, taking into account the thickness and leveling of the floor finishing material (vinyl flooring, hardwood flooring, etc.].

Manufacturing Specifications by Door Type

Production sizes may vary depending on the manufacturer.

Door types Standard thickness (T] Maximum production width (W] Maximum build height (H] Features and Installation Recommendations
ABS door 35mm ~1,1150mm ~2,350mm Moisture resistant, highly recommended for bathrooms and doors.
Membrane door 35mm ~ 45mm ~1,150mm ~2,380mm Various molded designs, pay attention to heat/moisture resistance
note.

In the case of old buildings, there may be bulging of the door frame, so it must be manufactured based on the narrowest point after measuring at three points.

Essential Checklist for Fail-Free Construction

Here are some tips to prevent the most common mistakes that occur during DIY interior decorating.

  • The Law of 3-Point Measurement

    Please measure the width at the top, middle, and bottom, and the height at the left, right, and center. You must place the order based on the smallest measurement to prevent the door from getting stuck.

  • Consider changing the floor finish

    If you replace vinyl flooring with hardwood or install tiles over it, the floor will become higher. In this case, you must reduce the height by an additional 5mm compared to usual.

  • Easy Hinge vs. Standard Hinge

    Easy hinges that do not require a groove will have play due to the thickness of the hinge itself. If there are grooves in the existing door frame or door, you must adjust their depth.

  • Verticality check

    Use a laser level to check if the door frame is tilted to the side. If the tilt is severe, it is safer to reduce it by 1 to 2 mm more than the calculated value.

Frequently Asked Questions (FAQ]

  • Q. How much smaller should I order the door than the door frame?
  • A. Typically, a clearance of 8mm is left on the left and right combined, and 4mm on the top. If you set the clearance to 8mm in the calculator, installation can be done smoothly.
  • Q. The bathroom door is rotten; can I get a replacement of the same size?
  • A. If you feel the door is stiff when opening and closing it, reduce the size slightly. Be sure to choose a water-resistant ABS door. MDF is susceptible to moisture and will quickly swell up again.
  • Q. Do I have to specify the location of the handle hole (drill]?
  • A. Yes, it is very important. Even ready-made products have standard positions, but if they do not match the catch hole location of the existing door frame, the door will not lock and rework may be required.