AND CALCULATE AREA AND VOLUME roll length and width to get area. Set height to get volume. Use either imperial or metric units; just roll and store values with dedicated keys; display shows answers clearly. Based on start and stop point accuracy and scale magnitude, most users typically experience +/- 2%-3% rolling error.
MANUALLY COUNT items while rolling a set of plans to estimate for studs, piers, outlets or other recurring items; touch Count button to add, or press the Subtract button to remove the last entry