Construction Master 5 Calculator

The Construction Master® 5 Calculator is designed for ease and solves challenging building and dimensional problems quickly. There is no need to memorize formulas--simply enter the numbers and solutions appear instantly. This handy calculator helps to reduce the risk of expensive errors when estimating costs and materials, and includes a bonus CD-ROM that contains an English/Spanish “how-to” video and guide. See the full list of features below.

• Dimensional Math & Conversions
  Works in all dimensional formats: quickly add, subtract, multiply, divide and convert in feet-inches-fractions, decimal feet, decimal inches, inches and fractions, yards, meters, centimeters, millimeters, board feet, as well as square and cubic formats.
• Handles all fractions-1/2's, 1/4's, 1/8's, 1/16's, 1/32's, 1/64's
  Work in fractions for all sorts of dimension problems. You can even set fraction denominators to display your desired accuracy (in above fraction formats).
• Right-Angle Solutions
  Instant square-ups, slopes, rafter length and rake wall solutions. No more formulas or memorization of Pythagorean theorem! Pitch, Rise, Run, Diagonal/Common, Hip/Valley and Jack keys find rafter lengths instantly. Also solves for lengths of irregular Hip/Valley and Jack rafters.
• Automatic Stair Calculations
  Finds number of risers, treads, riser height, tread width, and any underage or overage for stairway layouts. Also calculates stringer length and angle of incline.
• Circle Solutions
  Solves circumference, circle area, arc lengths for columns, post holes, pillars and more.
• Instant Area & Volume Calculations
  For fast & accurate material estimates, such as volume of concrete.
• Weight per Volume Key
  Lets you convert between weights (lbs, tons, kg) and find weights of any material (e.g., tons per cubic yard).
• Board Feet Key
  Helps estimate material amounts and costs of lumber.
• "Smart" Fraction Setting
  Saves keystrokes by entering preset fraction denominators for you, from 1/2 to 1/64.
• Paperless Tape
  Lets you review the last 20 entries, for double-checking answers.
• Standard Calculator
  Works as a regular math calculator, for your everyday math needs.
• Protective Case
• Long-Life Battery

Spec Summary:

Size:
5.5 x 3.0 x 0.5" (140 x 76 x 13 mm)

Product Weight (product only with battery):
3.2 oz. (91 g)

Power:
3-volt lithium (CR-2032) battery (included)

Bat. Life:
Approx. 800 hours usage

Auto Shut-off:
8-12 min.

Keypad:
42 keys; soft-touch silicone rubber

User's Guide:
64 pp.; 5.0 x 2.5" (127 x 64 mm).

Case:
Protective 360 degree Hard Cover Door.

Operating Temperature:
32-130 deg. F (0-55 deg. C)

Display Type:
LCD segment; 11 digits (7 normal, 4 fractions), with annunciator-legends

Display Dimensions:
0.86 x 2.5" (22 x 64 mm)

Accuracy:
10 digit internal accuracy