1/2" EMT Bending Chart

By Blissom · Updated 2026-10-23

Layout values: check them against your own bender, on scrap first.

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1/2" EMT and its bender

1/2" EMT is the workhorse of commercial branch wiring: device drops, short runs between boxes, and lighting circuits. It holds nine #12 THHN, which covers most 20 A branch circuits with room for a neutral and ground.

Klein's guides list 5" for the 1/2" EMT shoe and it is the common value, but other makers, models and worn shoes can differ. To check yours, bend a scrap with the arrow at 10", measure the stub and subtract 10.

Stub-up marks for 1/2" EMT

Most 1/2" stubs are short: drops into device boxes, risers out of a slab, short legs between boxes. The arrow goes 5" short of the stub height, hook toward the end you measured from.

With a 5" take-up you need at least a few inches of conduit past the arrow for the shoe to grip, so stubs under about 7" are awkward on a full stick. For short stubs, bend the 90 first on a long piece and cut the stub to length, or bend from the other end.

Back-to-back 90s on 1/2" EMT

On 1/2" the two methods differ by 5": the star sits on the full back-to-back distance, the arrow 5" short of it with the hook facing the first 90. 1/2" U-bends usually wrap a beam or tie two boxes back to back.

Star column: 1/2" back-to-back distance from the back of the first 90, hook away from it. Arrow column: 5" less, hook toward the first 90; that leg swings toward you, so stand clear. Same plane for both 90s.

Cut lengths for pieces with 90s

On a Klein 51606 (4-5/8" centerline radius) each 1/2" 90 uses 2.691" (about 2-11/16") less conduit than its two legs measured to the back, so a U with two 90s is about 5-3/8" shorter than its legs added together. A shoe with a different radius changes this: use the gain-by-radius table below. The table uses the unrounded gain.

Worked example on 1/2" EMT

1/2" piece: 14" stub, 36" leg (both to the back of the 90).

1. Arrow mark: 14 − 5 = 9" from the stub end.
2. Cut length: 50" of legs − 2.691" gain = 47-5/16".

Gain by shoe radius

Gain = 0.429 × your shoe's centerline radius, plus 0.706" to the back of the 90.

Gain at each angle on a 4-5/8" radius 1/2" shoe

On a 4-5/8" radius shoe, gain on 1/2" offsets is small: under 1/16" per bend at 30° and about 3/16" at 45°, which is why the field multipliers need no extra radius correction on shallow 1/2" offsets. This gain is separate from offset shrink: the field method still uses its multiplier and shrink allowance.

Offsets, saddles and kicks on a 4-5/8" 1/2" shoe

Theoretical minimum offset for two adjoining bends on this 4-5/8" 1/2" radius: 2 × radius × (1 − cos θ), rounded up. These are geometric lower bounds, not workable minimums: shoe length, hook clearance and the maker's instructions set the real limit, so check on your bender.

Marks for a 1/2" saddle, kick or offset; every bend counts toward the 360° maximum between pull points (NEC 2023 358.24(B); the 2026 NEC adds 300.24 for mixed raceway types).

How many wires fit in 1/2" EMT

By area, 1/2" EMT holds nine #12 THHN or five #10 at the 40% limit; past that, step up to 3/4". Mixed wire sizes: conduit fill calculator.

1/2" fill counts are not circuit capacity: grounds count toward fill, and over three current-carrying wires usually need ampacity adjustment (NEC 310.15(C)(1)).

Bending 1/2" EMT well

The 1/2" shoe is light enough to bend on the floor with foot pressure alone, and to bend in the air for small offsets and kicks. Because the radius is tight (about 4-5/8" on a Klein 51606), 1/2" is the size where an over-bent 90 or a kinked offset shows most; keep steady foot pressure on the heel and pull the handle in one motion.

• Bending 1/2" rigid on the 1/2" EMT shoe: rigid is larger outside (0.840" vs 0.706") and needs a 3/4" EMT shoe rated for rigid.
• Not checking for spring-back: the conduit relaxes a little when you release the handle, so check the 90 with a level and correct it as your bender’s instructions describe.
• Saddles over wide obstructions: a wide or flat-topped obstruction is usually better crossed with a 4-point saddle than a 3-point one.

Sources: NEC 2023 358.24 and Chapter 9, Table 2; Klein Tools Conduit Bender Guide (stub take-up, offset multipliers and shrink, saddles). Method.

Questions electricians ask

Your 1/2" shoe, already loaded

• 1/2" EMT shoes from Klein, Greenlee, IDEAL, Milwaukee, Southwire and Gardner Bender
• Short stubs flagged before you bend them
• Box offsets and kicks for device drops
• Marks from the end of the stick, offline

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