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General| Brand | Calculated Industries |
|---|---|
| Model | 4020 |
| Category | Calculator |
| Language | English |
Arithmetic, number entry, percent, off, and on/clear keys.
Convert, Store, and Recall keys for data manipulation.
Keys for Yards, Feet, and Inches, including fractional entry.
Keys for Meters, Centimeters, and Millimeters.
Keys for Acres and Board Feet for area and cubic measurements.
Keys for entering Length, Width, and Height for calculations.
Keys for converting between weight units like Pounds, Tons, and Kilograms.
Functions for calculating circle area, circumference, and arc properties.
Includes backspace, square root, reciprocal, and squaring functions.
Functions for clearing all values and toggling number signs.
Accesses Pi, and sets Weight per Volume values.
Calculates total cost and converts between angle formats.
Functions for adding, subtracting, recalling, and storing values in memory.
Useful for checking figures by scrolling through past entries and calculations.
Demonstrates the step-by-step process of using the paperless tape feature.
Configures the precision for fractional displays (e.g., 1/16, 1/32).
Sets how area and volume values are displayed (e.g., Sq Feet, Cu Yards).
Configures exponential mode and meter linear display formats.
Sets decimal degree display and fractional number entry modes.
Demonstrates adding and subtracting measurements in Feet-Inch-Fraction format.
Shows how to multiply dimensional values for practical applications.
Demonstrates dividing dimensional measurements into parts.
Shows how to perform percentage calculations like adding waste allowance.
Calculates the area of a square based on its side length.
Calculates the square root of a given number.
Calculates area and volume of rectangular prisms and shapes.
Uses the Height key for volume, wall area, and total room area calculations.
Demonstrates adding waste allowance to square and cubic measurements.
Shows conversions between feet, inches, yards, and metric units.
Demonstrates conversions between square feet/yards and cubic feet/yards.
Shows how to convert between different weight units like pounds and kilograms.
Calculates material weight based on volume and density.
Demonstrates storing and converting new weight per volume values.
Details how memory is cleared and how to recall accumulated values like averages.
Example of using memory to calculate carpet quantity with waste allowance.
Calculates total board feet and cost for lumber projects.
Calculates the area and circumference of a circle given its diameter.
Finds arc properties like degree, chord length, and segment rise for curved segments.
Calculates concrete volume and cost for driveways.
Shows how to square-up a foundation layout for accurate construction.
Explains how to temporarily set fractional resolution formats for specific calculations.
Details default values for stored and preference settings after a reset.
Explains display capacity, error codes, and how to clear calculator errors.
Information on battery type (LR44) and recommended replacement procedures.
Step-by-step instructions on how to replace the calculator batteries.
How to perform a total reset if the calculator becomes unresponsive.
Provides formulas for calculating areas of squares, triangles, rectangles, octagons, circles, and ellipses.
Provides formulas for calculating volumes of cubes, rectangular prisms, cones, spheres, and cylinders.
Outlines steps for returning a product for service or warranty evaluation.
Details the one-year warranty, coverage, and repair/replacement policy in the USA.
Covers service for issues outside the warranty period or due to misuse in the USA.
Information on obtaining repair service for products purchased outside the U.S.
Legal disclaimer regarding product quality, performance, and liability limitations.
Information regarding the equipment's compliance with FCC Class B regulations.
Invitation for users to submit ideas for product or guide improvements.
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