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Calculated Industries Sheet Metal/HVAC 4090 - Advanced Construction Math Calculator

Home > Construction > Calculated Industries Sheet Metal/HVAC 4090 - Advanced Construction Math Calculator

Calculated Industries Sheet Metal/HVAC 4090 - Advanced Construction Math Calculator Image - Click to enlarge

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
  • 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
  • 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


  • 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

Usually ships in 2-3 business days

CI-4090 $89.95Sale: $69.95

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