How to Choose the Right Door Hinge

A door hangs true and quiet for decades when the hinge matches the door — its thickness, height, and weight. Get that wrong and you get sag, torn-out screws, and chewed-up jambs. The good news: sizing follows a simple chart based on three numbers, and once you know it, picking the rest is straightforward.

For broader project planning, explore WBC’s doors and millwork resources.

This guide covers residential and light-commercial door hinges — the butt hinges, spring hinges, and ball-bearing hinges most builders and homeowners deal with on interior and exterior doors. National Hardware door hinges provide reliable protection with attractive details and finishes, are easy to install, and give an exact range of motion every time.

Sizing the Hinge to the Door

Door thickness and height drive hinge size. Heavier and taller doors need bigger, beefier hinges set in more places. Hinges are measured open and lying flat, so a “4-inch hinge” measures four inches across both leaves laid out.

Door Thickness	Door Height	Hinge Size & Count
1-3/8”	Up to 32”	Two 3-1/2”
1-3/8”	32”–36”	Two 4”
1-3/4”	Up to 36”	Two 4-1/2”
1-3/4”	36”–48”	Two 5”
1-3/4”	Over 48”	Two 6”
2”–2-1/2”	—	5” or 6” heavy-duty commercial, 2 or 3 per door

Most interior residential doors land at 3” or 3-1/2”. The chart climbs from there as doors get thicker and taller. When a leaf reaches the upper end of a height range, add weight rating, not just length.

For load rating, the standard full-mortise butt hinge carries real weight. National Hardware’s door hinges use a five-knuckle full-mortise design built to a 50 lb safe working load. Western Building Center carries National Hardware butt hinges in several finishes, including the N830-247 in satin nickel, the N830-202 in oil-rubbed bronze, and the N830-208 and N830-211 in polished brass. For barn, shed, and gate work, heavy tee hinges come in 4-inch, 6-inch, and 8-inch sizes.

Corner Style, Finish, and Material

Three corner styles cover residential doors: square (no radius), 1/4-inch radius, and 5/8-inch radius. A quick gauge — a 1/4” radius matches the curve of a dime, a 5/8” matches a quarter. Function is identical across all three. On a new door, it’s purely a look. On a replacement, match the existing mortise cutout exactly or you’ll be chiseling.

Finishes run the full range — satin nickel, oil-rubbed bronze, polished brass, black, chrome, antique brass, white, zinc plated, and more. Pick to match your hardware and trim.

Material is where Montana doors earn or lose their longevity. Three base materials: cold-rolled steel (plated or lacquered), solid brass, and 300-series 18-8 stainless steel. Steel hinge finishes break down with exposure to moisture, cleaning solutions, or paint remover. That matters on any exterior or high-moisture door facing freeze-thaw cycles. Stainless steel — with 18% chromium — won’t corrode or rust outdoors and self-heals freshly exposed surfaces. Brass holds up too. For exterior and deck-access doors, stainless or brass is the right call.

There’s also a coated-steel option. National Hardware’s WeatherGuard protection is proven to be 3x more resistant to corrosion versus competitors, formulated to withstand the harshest weather and stand up to the corrosive effects of pressure-treated lumber, with testing and field use showing it far superior over standard zinc-plated products. Useful where a door meets treated lumber — exterior thresholds, deck doors, shop entries.

Spring, Self-Closing, and Ball-Bearing Options

Standard butt hinges hold the door. Specialty hinges do more.

Spring hinges close the door on their own — fire-rated openings, garage-to-house doors, anywhere a door needs to self-shut. The N350-884 spring hinge is UL approved for fire doors, has adjustable tension and closing speed, fits a standard hinge cutout, comes in cold-rolled steel, and carries a 30 lb safe working load. It’s available in 3-1/2” and 4” with a 5/8” radius. The N350-835 covers the same ground — cold-rolled steel, adjustable closing speed and tension, standard cutout fit, UL approved for fire doors — with 1/4” radius corners. Because both fit the standard cutout, they swap into an existing door without re-mortising.

For two-way swinging doors, there’s a double-acting option. The N100-052 double-acting spring hinge is self-closing and provides two-way access for swinging doors, with a tight pin adjustable for desired closing speed, screws included, and cold-rolled steel construction. It’s a 3” hinge rated to a 12 lb safe working load.

For doors that open and close all day — high-traffic interior passages — ball-bearing hinges (ANSI/BHMA Grade 2) use permanently lubricated bearings for smoother, quieter, longer-lasting operation. National Hardware’s door hinge solutions include ball bearing and surface mounted hinges. Squeak Guard hinges are made to keep doors from squeaking as a house settles — relevant in a climate where seasonal swings move framing.

Installation Basics

Even a pre-mortised replacement has details that matter.

Set the pin head on top. The barrel has to sit out far enough to clear the casing when the door swings open. Mortise the door and jamb as deep as the hinge thickness, and make sure the barrel clears the casing when the door is open. Screw holes are countersunk and fasteners come included.

Hand matters on doors that open away from you: hinges on the right make it right-hand, hinges on the left make it left-hand. Confirm before you order spring or specialty hinges.

One firm rule. Do not paint hinges — it compromises the mechanism; use factory-primed hinges if custom colors are required. Paint gums the knuckle and shortens the hinge’s life.

Frequently Asked Questions

What size hinge does a standard interior door need? Most interior residential doors at 1-3/8” thick and up to 32” tall take two 3-1/2” hinges. From 32” to 36” tall, step up to two 4” hinges. Common residential sizes are 3” and 3-1/2”.

How do I size hinges for a heavy exterior door? Go by thickness and height. A 1-3/4” door up to 36” tall takes two 4-1/2” hinges; 36” to 48” takes two 5”; over 48” takes two 6”. Thicker 2” to 2-1/2” doors move to 5” or 6” heavy-duty commercial hinges, two or three per door.

Which corner style do I buy for a replacement? Match the existing mortise. Square corners need square hinges; rounded cutouts need 1/4” radius (dime curve) or 5/8” radius (quarter curve). On a brand-new door the choice is cosmetic, since all three function identically.

What hinge material lasts on an exterior door in a wet climate? Stainless steel or brass. Stainless contains 18% chromium, won’t rust outdoors, and self-heals scratched surfaces. Plated or lacquered steel finishes break down when exposed to moisture, cleaning solutions, or paint remover. A WeatherGuard-coated steel hinge is another option built for harsh weather and pressure-treated lumber contact.

Can I get a hinge that closes the door automatically? Yes. Spring hinges have adjustable tension and closing speed and fit a standard hinge cutout — the N350-884 and N350-835 are UL approved for fire doors and rated to 30 lb. For two-way swinging doors, the double-acting N100-052 self-closes from either direction at a 12 lb load.

Why shouldn’t I paint my hinges? Paint fouls the moving mechanism and shortens the hinge’s lifespan. If a hinge has to match a painted color, start with a primer-coated hinge made to take a finish.