Pipe Calculators

Pipe Fitter • Field Tools

Isometric Drafting

For the best drawing experience, open the drafting tool full screen.

Open Isometric Drafting
Pick a common bender radius, or choose Custom to type your own.
Formulas:
Set Back=TAN(Half Angle of Bend)*RADIUS
Advance=Degrees*0.01745*Radius
Gain=2*Radius*Tan(1/2 Degree of Angle)-(2*pi*Radius*Angle)/360
Angle (°) Set Back (rounded) Advance (rounded) Gain (rounded)

Single Offset (solve from one known)

Uses trig (sin/cos/tan). Travel is the hypotenuse.

Results

Set
—
Run
—
Travel
—
Rounded values shown as nearest 1/16" + decimal.
Angle (°) Run (rounded) Travel (rounded) Run (raw) Travel (raw)

Equal Spread

Formula
X = tan(Angle/2) * Spread
Result
—

Argon Purge Time

Uses Schedule 40 inside diameters for the preset NPS list (typical). Custom uses your ID.
Enter the length you’re purging (defaults to 1 ft).
Calculated Volume
—
Volume shown in ft³ (and in³).
Purge Time (minutes)
1× Volume
—
4× Volume
—
6× Volume
—
Countdown
00:00
Ready.
Purge log
Timestamp Pipe Size Length (ft) CFH 1× (min) 4× (min) 6× (min)
Rule of thumb: many weld purge setups target multiple pipe-volumes depending on quality requirements, leaks, dams, and venting.

Construction Calculator

Enter dimensions with feet and inches like 10' 6 1/2" + 3' 2".
Expression
Result
—
Tip: use * or / with a number to multiply or divide a length, like 12' 6" / 3.
Feet-Inches
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Decimal Inches
—
Decimal Feet
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Created By Daniel Green • Local 441