--- title: "Offset Multiplier & Shrink Chart for Conduit Bending (10°–60°) | BendBoss" description: "Conduit offset multiplier and shrink chart for 10°, 22½°, 30°, 45° and 60° bends — published bender values next to the exact trigonometry, plus a speed table of distance between bends and shrink for 2″–12″ offsets." url: https://bendboss.app/offset-multiplier-chart/ language: en last_reviewed: 2026-11-14 --- [BendBoss](https://bendboss.app/) › Multiplier & shrink chart # Offset multiplier and shrink chart Every offset, kick and four-point saddle comes back to two numbers per angle: the multiplier (distance between bends per inch of depth) and the shrink (length lost per inch of depth). Here they are, both as the bender makers print them and as exact trigonometry. Last reviewed Nov 14, 2026 · Sources at the end of the page The distance between bends is the hypotenuse; the depth is the opposite side. ## Multiplier and shrink by angle Angle| Published multiplier| Exact multiplier (1 ÷ sin θ)| Published shrink per inch| Exact shrink per inch (tan θ/2) ---|---|---|---|--- 10°| 6.0| 5.759| 1/16″ (0.062)| 0.087 22½°| 2.6| 2.613| 3/16″ (0.188)| 0.199 30°| 2.0| 2.000| 1/4″ (0.250)| 0.268 45°| 1.4| 1.414| 3/8″ (0.375)| 0.414 60°| 1.2| 1.155| 1/2″ (0.500)| 0.577 Published values: Greenlee Site-Rite Use Guide Table 1, Klein Tools "Offset Formula Table", Gardner Bender B-0040 Table 2 — all three agree. Greenlee also lists 15° (multiplier 3.86, shrink 1/8″). ## Why the published and exact numbers differ Bender makers round the multiplier to one decimal so it can be done in your head: 6.0 instead of 5.76 at 10°, 1.4 instead of 1.414 at 45°, 1.2 instead of 1.155 at 60°. At 30° there's no difference — sin 30° is exactly ½. The shrink column is rounded the other way: the textbook values (1/16″, 3/16″, ¼″, ⅜″, ½″) sit a little under the pure geometry of tan(θ ÷ 2), which ignores the bend radius. In practice: at 22½°, 30° and 45° the two columns land within a sixteenth or two on normal offsets. At 10° and 60° they drift apart on deep offsets — on a 6″ offset at 60°, 6 × 1.2 = 7.2″ but 6 × 1.155 = 6.93″. Bend one on scrap and trust your bender. BendBoss uses the exact multiplier and the published shrink values. ## Speed table: distance between bends / shrink Offset depth| 22½°| 30°| 45°| 60° ---|---|---|---|--- 2″| 5 1/4″ / 3/8″| 4″ / 1/2″| 2 13/16″ / 3/4″| 2 5/16″ / 1″ 3″| 7 13/16″ / 9/16″| 6″ / 3/4″| 4 1/4″ / 1 1/8″| 3 7/16″ / 1 1/2″ 4″| 10 7/16″ / 3/4″| 8″ / 1″| 5 11/16″ / 1 1/2″| 4 5/8″ / 2″ 5″| 13 1/16″ / 15/16″| 10″ / 1 1/4″| 7 1/16″ / 1 7/8″| 5 3/4″ / 2 1/2″ 6″| 15 11/16″ / 1 1/8″| 12″ / 1 1/2″| 8 1/2″ / 2 1/4″| 6 15/16″ / 3″ 8″| 20 7/8″ / 1 1/2″| 16″ / 2″| 11 5/16″ / 3″| 9 1/4″ / 4″ 10″| 26 1/8″ / 1 7/8″| 20″ / 2 1/2″| 14 1/8″ / 3 3/4″| 11 9/16″ / 5″ 12″| 31 3/8″ / 2 1/4″| 24″ / 3″| 17″ / 4 1/2″| 13 7/8″ / 6″ Each cell: distance between bends (exact multiplier) / total shrink (published shrink per inch), rounded to the nearest 1/16″. ## How to use the chart 1. Measure the offset depth — how far the conduit has to move over. 2. Pick the angle (30° unless space forces otherwise). 3. Depth × multiplier = distance between your two marks. 4. Depth × shrink per inch = how much to add to your measurement when bending toward an obstruction. The same two numbers drive [kicks](https://bendboss.app/kick-calculator/) (one bend, multiplier only), [four-point saddles](https://bendboss.app/4-point-saddle-calculator/) (two offsets) and [rolling offsets](https://bendboss.app/rolling-offset-calculator/) (true offset first, then the chart). The [parallel-offset shift](https://bendboss.app/parallel-offset-calculator/) uses tan(θ ÷ 2) too. ## Common questions ### What is the multiplier for a 45° offset? Published bender tables say 1.4; the exact value is 1 ÷ sin 45° = 1.414. A 10″ offset at 45° needs 14″ (table) or 14 1/8″ (exact) between bends. ### What is the shrink for a 22½° offset? 3/16″ per inch of offset depth, per Greenlee, Klein Tools and Gardner Bender. ### Why is the 10° multiplier 6 on my bender? It's rounded. 1 ÷ sin 10° = 5.76. Makers print 6.0 so the math is quick; on shallow offsets the difference is small. ### Is the shrink the same for every conduit size? The published tables say they apply to any size of conduit. Real shrink also depends on the bend radius of your shoe, so check a sample bend on bigger sizes. ## Sources * [Greenlee, Aluminum and Iron Site-Rite® Hand Benders Use Guide, 52034125 REV 02 (2023)](https://cdn.greenlee.com/resources/media?key=1adba548-f1d2-43d2-bf44-fe4b89a8b579&languageCode=en&type=document) * [Klein Tools, Conduit Bending Basics (Iron & Aluminum Benders)](https://data.kleintools.com/sites/all/product_assets/documents/instructions/klein/ConduitBenderGuide.pdf) * [nVent Gardner Bender, Hand Benders How-To Guide B-0040](https://file.ecmindustries.com/-/media/inriver/B-0040.pdf) **Every bend on this site, in one app** BendBoss does offsets, saddles, rolling offsets, stub-ups, kicks, parallel runs (mixed sizes), segmented and compound 90s — fraction keypad, bend diagrams and step-by-step walkthroughs. $25.00 once. No subscription, no ads. English and Spanish. [Get BendBoss — $25.00 once](https://www.paypal.com/ncp/payment/XJL85QN76KKT6)[See what's in the app](https://bendboss.app/conduit-bending-app/) ## Related bend guides * [Offset calculator](https://bendboss.app/offset-calculator/) * [Kick](https://bendboss.app/kick-calculator/) * [4-point saddle](https://bendboss.app/4-point-saddle-calculator/) * [Rolling offset](https://bendboss.app/rolling-offset-calculator/) * [Parallel offsets](https://bendboss.app/parallel-offset-calculator/)