Conduit bending calculators
Conduit bending math, one page per bend: the marks and the shrink as tape fractions or millimetres, the working shown, the procedure at the bender under the number. Start with the offset — or, if you are new to it, start from zero →
- Geometry, not tables. Every figure is trigonometry on what you type; take-up comes off your own bender.
- Inches or millimetres. Tape fractions to the sixteenth, or whole mm — one switch at the top sets the whole site.
- Free, phone-first. No sign-up. Works with gloves on; email the marks to yourself or print them for the bender.
Conduit offset calculator
Enter the height you need to clear and your bend angle. The marks and the shrink update as you type, the diagram redraws with them, and the "Do it" list under the number is what to do at the bender. Every other bend has its own page below.
Your most-used
Organise my tools — pin, order, hide, make lists
Every bend, one page each — and how to bend it
18 calculators and 21 guides, grouped the way the work is. Type to narrow it down, or browse all calculators and all guides.
Calculators
Offsets
- Conduit offset Rise and angle to the distance between marks and shrink.
- Offset angle finder Rise and the room you have to the exact angle, marks and the chip angle that fits.
- Rolled offset Rise and roll to the true offset and roll angle.
- Box offset The small step that seats a connector in a knockout.
- Parallel offsets Keep a rack of conduits even through the jog.
- Conduit shrink The length an offset pulls out of the run.
- Bending multipliers Every angle: exact multiplier and the shop rule.
Saddles
90s and stubs
- 90° stub-up Height and take-up to the mark from the end.
- Kick 90 A 90 stub with a kick in the tail to lift the run.
- Back-to-back bend Two 90s a set distance apart, as a squared U.
- Bender take-up Find your own take-up from a test bend.
- Deduct and gain Your bender’s deduct and gain to the cut length and marks of two 90s.
Sweeps and turns
Guides
Learn to bend
- Bending, from zero Six short lessons for a first-week apprentice, each with a drill.
- How to bend conduit The guide, in the order you learn the bends, as procedures.
- How to use a hand bender Hook, arrow, star, foot pressure: a hand bender step by step.
- Measuring and marking Where to hook the tape, which edge to mark, and how to keep marks honest.
- How to bend a 90 A stub-up from mark to plumb, and the checks that save a stick.
- How to bend an offset Two equal bends, marks the right way round, no dog leg.
- How to bend a saddle The three-point saddle over a pipe: notch, outers, and the shrink.
- How to bend a four-point saddle Two offsets that clear a flat obstruction, laid out as one job.
- Offsets around obstacles Measuring the rise off beams, pipe and ductwork, and picking the angle.
Fix it and check it
Pipe, tools and your bender
- EMT, rigid, IMC and PVC What bends differently, and what stays the same, from one pipe to the next.
- How to bend PVC conduit Heat, form, cool: hot box or blanket, plugs, and holding the shape.
- Measure your bender Take-up, gain, notch and springback from four test bends — your table, not a chart.
- Your bender card Your own take-up, gain, notch and springback printed as a pocket card per pipe size, stub marks worked out.
Reference
- 3-point vs 4-point saddle Which saddle for which obstruction, and how the marks differ.
- Bending cheat sheet The multipliers, shrink and procedures on one sheet to print.
- Conduit bending formulas Every formula on the site, from one triangle.
- Tape measure fractions Decimals to sixteenths, and a drill that keeps going.
- Conduit bending glossary Shrink, gain, take-up and the rest defined.
Nothing matches that. Try one word — offset, saddle, 90 — or browse all calculators and all guides.
Related tools by email — optional
Now and then — at most one email every two weeks — the calculators and references that fit what you use, here and on fieldcalc.net and sparkytools.net. One list across the three, one click to leave. Tick the box, then confirm from your inbox; nothing goes out before that.