Numerus Calculator | Advanced Pipefitting & Construction Math

Advanced Calculator

Scientific functions, construction fractions, memory and direct field-measurement math.

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Tape / Architectural Math

Enter feet, inches and fractions. Examples: 12' 7 3/8" or 4' 11 5/8".

Measurement A

Measurement B

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Decimal ↔ Fraction

Round field dimensions to a selected denominator.

Decimal inches

Round to

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Pipe Size & Property Calculator

NPS/DN, actual OD, schedule wall thickness, ID, flow area, steel weight, internal volume and water-filled weight.

Nominal pipe size

Schedule

Material density

Simple Offset

Any-angle travel and advance/setback.

Offset

Fitting angle °

Rolling Offset

Horizontal roll + vertical roll → true offset, roll angle and travel.

Horizontal roll

Vertical roll

Fitting angle °

Elbow Takeoff

90° LR/SR theoretical center-to-end plus custom takeoff mode.

NPS

Elbow

Custom C-to-E

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Miter Geometry

Equal miter pieces for a direction change.

Total change in direction °

Number of miter joints

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Cutback / Weld Gap

Quick cut-length correction for multiple field joints.

Raw cut length

Gap each joint

Number of gaps

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Pipe Spool Cut-Length Calculator

Overall dimension minus fitting takeoffs, weld gaps and allowance.

Overall / C-C dimension

Left fitting takeoff

Right fitting takeoff

Weld gap each

Number of gaps

Other allowance (+ adds length)

Slope / Grade

Run (ft)

Slope %

Fall per foot (in/ft)

Pipe Spacing

Outside-diameter edge clearance to centerline spacing.

Pipe A OD

Pipe B OD

Clear gap

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Tank Wrap / Hexagon

Regular six-sided route around a circular tank.

Tank diameter

Clearance to pipe CL

Dummy Leg / Support Geometry

Right-triangle support from projections.

Horizontal projection

Vertical projection

Flange Bolt Circle

Bolt circle diameter

Number of holes

Start rotation °

Two-Hole / Rotation

Convert bolt-hole clocking angle to linear chord on the bolt circle.

Bolt circle diameter

Rotation angle °

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Flow from ID & Velocity

Inside diameter (in)

Velocity (ft/s)

Pressure → Force

Pressure (psi)

Area (in²)

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Pipe Hydrostatic Content

Inside diameter (in)

Length (ft)

Right Triangle

Enter any two sides. Leave the unknown side blank.

Rise A

Run B

Hypotenuse C

Circle / Arc / Chord

Diameter

Arc angle °

Divisions

Industrial Unit Conversions

Pipe Saddle / Lateral Pattern Generator

Produces a developed wrap pattern, ordinate table and SVG download.

Branch OD

Header OD

Branch angle °

Centerline offset

Axial cut allowance

Ordinate divisions

Clock	Degrees	Wrap distance	Cut ordinate