Door Swing Direction: How to Measure and Specify It Correctly

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Door swing direction describes which way a door opens: toward you or away from you, and whether the hinges sit on the left or right side. To specify it correctly, stand on the side from which you will approach the door, note where the hinges are and which way the leaf opens, and state that clearly in your order.

What Door Swing Direction Means

Door swing direction is the way a door moves when it opens. Two things define it: whether the door pulls toward you or pushes away from you, and which side the hinges are on when you face the door from the outside or the approach side.

Getting this right matters because a door that opens the wrong way can block a passage, hit furniture, or fail to meet escape requirements. For iron and aluminum doors, the swing also affects where the lock, handle and closer are mounted, so it should be settled before production starts.

How to Determine the Swing Correctly

Stand on the side you will approach the door from, which is normally the outside of a front entrance or the corridor side of an interior door. Look at the door as if it were closed and ask two questions: are the hinges on the left or the right, and does the door open toward you or away from you?

Hinges on the left and door opens toward you: left-hand, inward.
Hinges on the right and door opens away from you: right-hand, outward.

Use the same reference side for every door in the project so that nothing is mixed up.

What to Measure on Site

Measure the clear opening width and height, the wall thickness, and the space needed for the leaf to swing without hitting anything. Note any obstacles such as a radiator, a wall lamp, a stair landing or a second door opening into the same space.

Also measure the clearance on the handle side, because the handle and lock need room to operate. Take photos of the opening from the approach side and from inside, marking the hinge side on each photo. These images help our team confirm the specification before drawing.

How to Write the Specification

Write the swing in plain words on your order, for example: "Left-hand, opens inward, hinges on the left when viewed from the outside." Include the reference side, since the same door reads differently from each face.

Also state whether the door should open fully flat against a wall, whether it needs a stop, and whether a closer is required. A short sketch with arrows showing the swing is often the clearest way to avoid misunderstandings.

Swing Direction and Fire or Exit Requirements

Some doors serving a shared corridor or an exit route must open in a particular direction to meet safety rules. Such requirements are usually set by the building plans and the relevant authorities, so check them with your architect or engineer before ordering.

If your door is part of an escape route, do not assume the usual direction applies. Confirm the requirement in writing as part of the approved drawings.

Checking the Drawing Before Production

After on-site measurement we prepare a drawing and a written specification that include the swing direction. Review it carefully and compare it with your photos and plans. Look at where the hinges, handle and lock appear, and confirm that the door opens into the room you intended.

Approval at this stage prevents costly corrections later, because a door made to the wrong swing cannot simply be turned around on site.

Frequently asked questions

What is the difference between left-hand and right-hand doors?

The terms describe the hinge side as seen from the approach side. A left-hand door has hinges on the left, and a right-hand door has hinges on the right, when you face the door from that side.

Does the swing direction affect the lock and handle?

Yes. The handle and lock position depend on the swing, so the direction must be confirmed before the door is fabricated.

Can a door's swing be changed after installation?

Usually not easily. Changing the swing typically means re-hanging or replacing the door, so it is best to settle the direction before production.

Who decides the required swing direction for an exit door?

The building plans and the applicable safety requirements set this. Confirm it with your architect or engineer before ordering.

Common mistakes to avoid

The most common error is describing the swing from the wrong side of the door, which reverses left and right. Forgetting to check obstacles that stop the leaf from opening fully is another frequent problem.

Our recommendation

Mark the hinge side and swing arrows on a photo of the opening, state the reference side in your order, and have the drawing checked against the site before approving production.

Summary

Door swing direction is set by the hinge side and the opening direction, viewed from a clearly stated reference side. Measure carefully, write it precisely, and approve a drawing before production.

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