Calculated Industries Sheet Metal/HVAC Pro  Materials Estimator 4090


Advanced Construction-Math Calculator for Sheet Metal, HVAC

The Sheet Metal/HVAC Pro Calc is designed for sheet metal workers and HVAC technicians to simplify dimensional math, geometry, trig, and has custom HVAC functions all in one simple-to-use and versatile tool for skilled tradesmen.

Sheet metal calculations
  • X, Y, R (radius)
  • Theta
  • Seg Radius
  • Converts between Polar and Rectangular Coordinates
  • Offset functions determine "S"- shaped bends in ductwork
Additional features
  • Order of operation
  • Parenthesis operators
  • Square, cube, square root, and cube root calculations
  • Works as a regular calculator
  • Backspace key for last entry editing
Trigonometric functions
  • Sine, Cosine, Tangent, Arcsine, Arcosine, and Arctangent
  • ArcK Constant
  • Calculates non-90° triangles
Built-in HVAC formulas
  • Fan Law Functions for Test and Balance (TAB)
  • Velocity
  • Velocity Pressure
Advanced construction-math functions
  • Work in and convert between building dimensional formats: feet, inch, fractions, and metric
  • Calculate instant areas and volumes
  • Perform square-ups, slopes, rafters, and more
  • Determine regular, irregular hip/valley rafter lengths plus plumb, level, and cheek cut angles
  • Perform complete stair layouts
  • Find circle, column/cone surface area, and volume solutions
  • Complete D:M:S to decimal degree conversions


Works directly in Feet, Inches, Fractions, Yards, and Meters – including Square and Cubic formats.

Built-in custom sheet metal functions
  • x, y, r (radius), theta, and Seg Radius Functions
  • Allows for conversion between Polar and Rectangular Coordinates
  • Offset Functions for "S-shaped" bend in ductwork solves layout for wrapper length, Centerline Radius, and the Angle
Mathematical Functions
  • Parenthesis Operators allows users to enter complex formulas
  • Calculations retain familiar mathematical hierarchy as a default preference
  • Trigonometric operation and sequence
  • Calculate square, square root, cube, and cube root
  • Determine right-angle solutions for ductwork length and angles
  • Works as a standard calculator
Memory Storage
  • Stores frequently used constants or interim solutions
  • Memory swap enables you to insert stored values into current calculations and simultaneously store calculated values while recalling and displaying memory contents
  • Users can set preferences
Test and Balance (TAB)
  • Fan Law functions: CFM, RPM, SP, and BHP
  • Velocity and Velocity Pressure: FPM, VP, MPS, KPa
  • ArcK constant for convenient Arc length solutions
Includes
  • Rugged shock, dust, and moisture-resistant Armadillo Gear case, and a protective slide cover
  • Quick reference guide and complete easy-to-follow user's guide,
  • 2 Long-life batteries (LR-44)
  • One-year limited warranty
Tech Specs
  • Size: 5.6" x 3.0" x 0.5" (142mm x 76mm x 13mm)
  • Product Weight: Calculator only 3.2 oz. (91gm)
  • Power: Two 1.5 volt (LR 44) Long-life Batteries
  • Display Type: LCD
  • Display Dimensions: 2.5"L x 0.75"W (64mm x 19mm)
  • Accuracy: 12 Digit Internal Accuracy


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