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Full Product Description

Calculated Industries 4225 Concrete Calc Pro Calculator

The easy-to-use ConcreteCalc Pro helps reduce material waste, improve design accuracy, and cut estimating time.

Increase efficiency in the field or in the office with fast, accurate solutions for Square-ups, Loads, Area, Volume, Rebar, Drop, Stairs, and much more.

It helps you:

  • Work in Yards, Feet-Inch-Fractions
  • Calculate Area, Volume, and Weight per Volume
  • Automatic Square-ups and Drops
  • Rebar solutions for total Linear Feet and Weight per size
  • Complete Stair Layouts; set Riser Height and Tread Width
  • Equal Sided Polygons
  • Circular Solutions: Circumference, Arc, Cone, Column, and More!
  • For Concrete, Masonry, and Paving Professionals

Learn more about this product here: ConcreteCalc Pro Intro and How To Use

Dimensional Math and Conversions:

Work in and convert between building dimensions: Yards, Feet-Inch-Fractions, and Metric – including Square and Cubic formats. Automatic Weight per Volume; select Pounds, Tons, Kilograms, or Metric Tons. D.M.S. to Decimal Degree Conversions.

Dedicated Functions:

  • Length, Width, Height keys for fast Area and Volume solutions
  • Instant Square-up and Drop for perfect layouts
  • Complete Stair calculations: Risers, Treads, Stringers, and Incline Angle
  • Solve “not-to-exceed” Riser Height, (Store “Riser Height” and “Tread Width”)
  • Rebar: find total Linear Feet and calculate Weight for Rebar Sizes; store various Rebar Size, On-center Spacing
  • Number of Loads: calculate the number of truck Loads based on Load size
  • Bags: easily determine the number of bags of concrete for small jobs
  • Circular solutions for Area, Arc, Circumference, Column, and Cones
  • Automatic Block and Footing keys for material estimates
  • Polygon: calculate Full angles and Bi-sect angles

Added Features/User Preferences:

  • Set custom options; Fractions, Volumes, Stairwell Opening
  • Cost per Unit: quickly solve unit cost and total pricing
  • Backspace Key: easily correct entry errors
  • "Paperless" Tape: enables review of last 20 entries; double-check totals

Works as a standard math calculator with %, +, -, x, ÷, +/-, Π, 1/x, x2, and √. Includes Protective 360° Hard Cover Case, Handy Pocket Reference Guides in English/Spanish, Long-Life Batteries, Full One-Year Limited Warranty.

Tech Specs:

  • Size: 5.7” x 3.0” x 0.65” (145 mm x 76 mm x 17 mm)
  • Weight: 4.15 oz. (117.7 gm)
  • Includes Case and Field Reference Guide
  • Power: One 3-volt (CR-2016) Long-life Battery
  • Display Type: LCD: 11 Digits* (7 normal, 4 Fractions) with Full Annunciators
  • Display Dimensions: 0.73” x 2.56” (19 mm x 6.5 mm)
  • Accuracy: 12 Digit Internal Accuracy
  • *Maximum Display: up to 19999999.99

Words from our fantastic customers.

Still not convinced? Check out our reviews!

Amy S.

High School Math Teacher

I have ordered calculators from Underwood Distributing for so many years that I have last track of the time. They are always quick to answer my emails and they get the product I need shipped out asap! 10/10

Mandee P.

Middle School Math Teacher

I teach middle school and wanted reliable calculators, at a good priced, and in a distinct color so everyone knows who they belong to. They were well-packed and arrived quickly! I am so pleased with my purchase and will keep this company in mind for future needs.

Math Teacher

Fort Zumwalt School District

My current order of graphing calculators was placed and ordered so quickly. Underwood Distributing Company made this process easy and I appreciate the timeliness along with the great price.

Underwood Distributing Co.

Discover more in our FAQs

How do I cancel or edit an order?

Because orders are processed and shipped within 0–2 business days, it's important to reach out to us as quickly as possible if you need to cancel or make a change. The best way to do this is to contact us directly:

Please include your order number and the change or cancellation you need. We're a small, flexible business and will do everything we can to accommodate your request before your order ships. Once an order has shipped, it cannot be cancelled, and you would need to follow our standard return process instead.