Cabinet Door Hinge Calculator
Enter the finished cabinet door size, weight, and hinge-center inset to estimate the hinge count and evenly spaced cup centerlines.
Recommended hinge quantity2
- Governing factor
- height and weight tie
- Hinge centerlines from top
- 3 in, 25 in
- Center-to-center spacing, in.
- 22
- Chart applicability
- Within the Blum CLIP top BLUMOTION chart.
Hinge layout
| Hinge | Centerline from top |
|---|---|
| 1 | 3 |
| 2 | 25 |
The count follows Blum CLIP top BLUMOTION planning bands and treats equal centerline spacing as a layout aid.
Include glass, mirrors, handles, applied panels, and other attached hardware in the finished door weight.
How to use this calculator
- Measure the finished door height and width after edging, panels, glass, or mirrors are included.
- Enter the finished door weight, including pulls and hardware attached to the door.
- Choose the top and bottom hinge-center inset you want to use for the nearest cup centers.
- Review the hinge count, centerline list, and chart warning before laying out the door.
How the hinge count is calculated
This calculator follows Blum's published planning guidance for CLIP top BLUMOTION concealed hinges. It converts the finished door height and width from inches to millimeters and the finished door weight from pounds to kilograms. The height and weight requirements are evaluated separately, then the larger requirement becomes the base hinge count.
The height bands used here are:
- 2 hinges for doors up to 750 mm tall.
- 3 hinges for doors over 750 mm and up to 1,500 mm tall.
- 4 hinges for doors over 1,500 mm and up to 2,100 mm tall.
- 5 hinges for doors over 2,100 mm and up to 2,500 mm tall.
The weight bands are 2 hinges up to 6 kg, 3 hinges over 6 kg and up to 12 kg, 4 hinges over 12 kg and up to 17 kg, and 5 hinges over 17 kg and up to 22 kg. The base count is max(height requirement, weight requirement). For a door wider than 600 mm, the calculator adds one hinge; when the door is wider than 650 mm it also marks the result outside the chart.
How the hinge spacing is calculated
The spacing layout starts with the inset you enter. The first hinge center is that distance down from the top of the door, and the last hinge center is the same distance up from the bottom. Intermediate hinges are spaced equally between those two points.
The formula is x_i = E + i x (D - 2E) / (n - 1), where D is door height in inches, E is the hinge-center inset in inches, n is the hinge count, and i runs from 0 through n - 1. The center-to-center spacing is (D - 2E) / (n - 1).
What changes the result most
Door weight often controls the result, especially when glass, mirrors, applied panels, or large handles are included. Door height can require more hinges even when the door is not heavy, because a tall narrow door needs more support along its length. Width is handled as a separate rule: above 600 mm, Blum's guidance calls for an additional hinge through the 650 mm extended-width limit.
What this calculator leaves out
The result is a planning benchmark, not a substitute for the selected hinge's product data. It does not model door material quality, screw holding strength, cabinet construction, impact loads, very frequent use, overlay, cup-boring dimensions, mounting-plate choice, or hinge opening angle. Equal spacing is useful for layout, but intermediate hinges may need to move to clear rails, joinery, glass, shelves, or other obstructions.
Worked example
Suppose a finished door is 60 inches tall, 25 inches wide, weighs 20 lb, and uses a 3-inch top and bottom hinge-center inset. The height converts to 1,524 mm, so the height band requires 4 hinges. The weight converts to about 9.1 kg, so the weight band requires 3 hinges. The base count is 4.
The width converts to 635 mm, which is over 600 mm but within the 650 mm extended-width rule, so one hinge is added. The calculator returns 5 hinges. The usable layout span is 60 - 2 x 3 = 54 inches, and 54 / (5 - 1) = 13.5 inches. The hinge centerlines from the top are 3, 16.5, 30, 43.5, and 57 inches.
Common questions
How many hinges does a cabinet door need?
Small, light cabinet doors commonly use two concealed hinges. Taller, heavier, or wider doors need more. This calculator compares height and weight bands, then adds one hinge for doors wider than 600 mm.
Does cabinet door weight matter more than height?
Weight is often the first driver because the hinges carry the door load. Height still matters because a tall door needs support spread along more of the door. The calculator uses whichever requirement is larger.
Where should concealed hinges be positioned?
The usual starting point is one hinge center near the top, one near the bottom, and any intermediate hinges evenly spaced between them. This tool uses the inset you enter for the top and bottom cup centers, then spaces the remaining centers equally.
Why does a wide cabinet door need another hinge?
A wider door puts more leverage on the hinge side and can feel less stable during opening and closing. Blum's guidance applies the main chart through 600 mm door width and adds a hinge for doors up to 650 mm wide.
Should the handle and glass be included in door weight?
Yes. Enter the finished door weight with glass, mirrors, decorative panels, handles, and other attached hardware included. Leaving those out can understate the hinge requirement.
Can this chart be used with hinges from another manufacturer?
Use it only as a planning comparison for other hinge lines. Final selection should follow the chosen manufacturer's load rating, cup pattern, mounting plate, overlay, and opening-angle requirements.