Addition & Subtraction

Overview

The device can add or subtract consecutive measurements, saving you from manual calculations. This works with:

• Distance measurements
• Area calculations
• Volume calculations

Addition Mode

Add multiple measurements together.

1. Take first measurement

   Measure your first distance/area/volume as normal.

2. Enter addition mode

   Press + — a ”+” symbol appears on screen.

3. Take additional measurements

   Each new measurement is added to the running total.

4. View total

   The sum displays in the summary line.

Tip

If you press + without a prior measurement, the display shows 0.000 as your starting point.

Subtraction Mode

Subtract measurements from a total.

1. Take first measurement

   Measure your first distance/area/volume.

2. Enter subtraction mode

   Press U- — a ”-” symbol appears on screen.

3. Take measurements to subtract

   Each new measurement is subtracted from the running total.

4. View result

   The difference displays in the summary line.

---

Area Addition Example

Calculate total floor area across multiple rooms:

1. Measure first room

   Enter area mode and measure length × width of Room 1.

2. Add second room

   Press +, then measure Room 2 dimensions.

3. Get total

   Press A after the final measurement to see the combined area.

Practical Example

Step	Room	Dimensions	Running Total
1	Living Room	5m × 4m = 20m²	20m²
2	Kitchen	3m × 3m = 9m²	29m²
3	Bedroom	4m × 3m = 12m²	41m²

---

Volume Subtraction Example

Calculate usable volume after subtracting obstacles:

1. Measure total space

   Enter volume mode and measure the full room (L × W × H).

2. Subtract obstacles

   Press U-, then measure built-in cabinets, columns, etc.

3. Get usable volume

   The result shows actual available space.

---

Quick Reference

Button	Function	Symbol
+	Addition mode	+
U-	Subtraction mode	-

Note

Addition and subtraction work across all measurement types. You can add distances, areas, or volumes—just stay in the same mode throughout.