Miteria Pipe Offset Calculator

Miteria is a pipe offset calculator for pipefitters, plumbers and welders: enter the offset and the fitting angle, and get the travel, the run and the cut length after fitting takeout, in mm or in feet, inches and fractions. It also solves rolling offsets, mitered pipe and laterals, and Miteria Pro adds a fitting takeout chart (ASME B16.9), parallel offsets, pipe data and PDF job sheets.

■ Why Miteria

• Offsets, rolling offsets, miters and laterals are free to use, with no account.
• A different takeout on each end; the weld gap comes off both ends.
• Takeout three ways: what you measured, from the bend radius, or from the standard table (Pro).
• Type 5' 3-1/2"; cut lengths come out to the nearest 1/16", with the decimal too.
• A drawing on every screen, matched one-to-one to the input boxes.
• Works offline, the same on a site with no signal.

■ Four calculations

[Offset] Travel, run and the length of pipe you actually cut. Angles 45°, 30°, 60°, 22.5°, 11.25°, or your own.
[Rolling offset] True offset and roll angle, from the horizontal AND the vertical, so you do not roll it the wrong way.
[Mitered pipe] Cut-line ordinates around the circumference; you choose the stations.
[Lateral / fishmouth] Branch-cut ordinates for a lateral or a tee.
Miter and lateral sheets can be saved as an image and shared.

■ Miteria Pro (one-time purchase, no subscription)

• Takeouts from the table: butt-weld 90° LR, 90° SR and 45° LR ells, tees and concentric reducers (ASME B16.9). Choose "From table" on Offset and Rolling offset.
• Odd-angle ells: takeout for a 90 cut down to any angle (radius × tan(angle ÷ 2)).
• Parallel offsets: how far to advance each pipe so a rack keeps its spread.
• Pipe data: OD and wall for carbon steel (B36.10M), stainless (B36.19M), copper K/L/M (B88) and PVC (D1785); ID and water content for steel, stainless and copper; carbon steel weight.
• Grade and fall (%, in/ft, mm/m), volume and velocity.
• PDF job sheets: result, drawing and dimension table with your company name, logo and customer — print or share.
• No ads.
Standard values are ASME/ASTM nominals; only values where two or more independent sources agree are included.

■ Please read this

Drawings on screen and in saved images are NOT to scale (not 1:1). Mark the pipe from the figures below the drawing.

Results are theoretical values from the dimensions you enter. Tolerances, cutting and bevelling, the real size of the fittings and weld shrinkage change them on site. Table values are nominal and fittings vary by maker. A cut cannot be undone — check on the actual material before cutting. This app does not decide compliance with any law, standard or specification.

■ Also

• Nineteen languages · mm or inches · light, dark or automatic appearance
• Ads are a banner at the top only — no full-screen ad interrupts a calculation. One video gives 60 minutes without ads.
• Two one-time purchases: one removes the ads only; Miteria Pro adds the Pro tools and removes the ads too.

■ Questions

How do I calculate a pipe offset?
Travel = offset ÷ sin(angle). Run = offset ÷ tan(angle). Cut length = travel − takeout of both fittings − the weld gap at each end. At 45° the travel is about 1.414 × the offset.

How do I calculate a rolling offset?
True offset = √(roll² + rise²), then work it as a normal offset. Miteria also gives the roll angle.

What is fitting takeout?
The distance from the center of the fitting to its end. For a bend it is radius × tan(angle ÷ 2); a long-radius 90 is about 1.5 × the nominal size. Pro takes it from the ASME B16.9 table.

How do I calculate a parallel offset?
Advance = spread × tan(angle ÷ 2). With 45° fittings each pipe starts its bend about 0.414 × the spread from its neighbor.

Is Miteria Pro a subscription?
No. It is a one-time purchase and comes back on a new phone with the same Google account. The four calculations stay free.

Recent changes:
Miteria now speaks 19 languages. Added: Traditional Chinese, Italian, Russian, Turkish, Indonesian, Thai, Arabic, Hindi, Vietnamese, Polish and Bengali. Pick yours in Settings › Language.