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Entering a Measurement

Type a number, then tap Feet or Inch to lock it into that slot. Enter feet first, then inches — e.g. 12 → Feet, 6 → Inch — to build a value of 12 FEET 6 INCH.

Length / Width / Height

Tap Length to store your first dimension. Add Width next and the display automatically switches to Area (L × W) in square feet. Add Height after that and it upgrades again to Volume (L × W × H) in cubic yards — useful for concrete, gravel, or excavation takeoffs.

Squaring & Slope

Sq-Up checks a diagonal against the stored Length & Width using the Pythagorean theorem, handy for squaring a foundation or deck. Drop stores a rise/fall value, and Slope% divides that Drop by the stored Length to report percent grade and inches-per-foot pitch.

Elevations & Cut/Fill

Use Exist to store the existing grade elevation and Prop for the proposed elevation. Cut/Fill then reports the difference and labels it CUT or FILL.

Trucking & Compaction

Loads estimates how many truck loads a stored volume will take. Comp% shows the material amount after a 15% compaction shrink, and Loose shows it after a 25% swell — quick checks for hauling and stockpile estimates.

Unit Conversions

Feet and Inch lock a plain number into that unit. Yds and m convert whatever number is on the display, from yards or meters, straight into feet-inches. Conv toggles a conversion-mode indicator on the display.

Memory & Math

M+ adds the current value to memory and Rcl recalls it. The operator keys (+, −, ×, ÷) and % work like a normal calculator but keep every result in feet-inch format. On/C clears everything and starts over.

Reserved Keys

Bank and Stor are placeholders for upcoming bank-yield and manual-store features — they don't calculate anything yet.