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Quantity Calculator

Automatically calculate quantities inside a quote or invoice using dimensions, surfaces, volumes, or satellite map measurements.

Written by Oliver Hoffmann

The Quantity Calculator helps convert dimensions and surface measurements into quantities directly inside your quotes and invoices.

This feature is especially useful for businesses working in:

  • roofing

  • siding

  • excavation

  • painting

  • landscaping

  • flooring

  • insulation

Calculations can be performed:

  • manually

  • using surface measurements

  • using volume calculations

  • directly from satellite maps


Accessing the Quantity Calculator

Inside a Quote:

  1. Open the desired line item

  2. Locate the Qty field

  3. Click the calculator icon

The Quantity Calculator will open automatically.


Available Calculation Modes

Mode

Best For

Linear

Gutters, fencing, trim, piping

Surface

Roofing, flooring, siding, painting

Volume

Concrete, gravel, excavation, insulation

Map (Satellite)

Roofing, landscaping, snow removal, exterior projects


Example — Surface Calculation (Roofing)

The Surface mode allows users to calculate quantities based on dimensions.


Step 1 — Select Surface Mode

Inside the calculator:

  1. Select Surface

  2. Choose the desired unit:

    • ft²


Step 2 — Enter Dimensions

Add one or multiple measurement rows.

Example:


Step 3 — Define Coverage Per Item

The Surface per item field determines how much area a single unit covers.

Example:


Step 4 — Add Waste (Optional)

Waste can be added as:

  • percentage (%)

  • item units

Examples:

  • 10%

  • 5 units

Useful for:

  • cuts

  • installation waste

  • overlaps

  • complex layouts


Step 5 — Apply Quantity

The calculator automatically converts the surface into quantity.

Example:

1,440 ft² ÷ 32 ft² = 45 items

Click:

Apply Quantity

The calculated quantity will automatically update the Quote or Invoice line item.


Example — Satellite Map Calculation

The Map mode allows users to measure areas directly from satellite imagery.

Ideal for:

  • roofing

  • landscaping

  • driveways

  • exterior projects


Step 1 — Open Map Mode

Inside the calculator:

  1. Select the Map tab

  2. Search the project address if not already there

[SCREENSHOT — Map mode opened]


Step 2 — Draw the Measurement Area

Click around the desired area to create a polygon.

The system automatically calculates:

  • total surface area

  • perimeter measurements


Step 3 — Configure Material Coverage

Example:

Optional waste can also be added if needed.


Step 4 — Apply Quantity

Click:

Apply Quantity

The calculated quantity will automatically transfer to the Quote or Invoice line item.


Supported Units

Surface

  • ft²

Linear

  • ft

  • m

Volume

  • ft³


Recommended Use Cases

Industry

Usage

Roofing

Shingles, membrane

Siding

Exterior panels and materials

Flooring

Hardwood, tile, vinyl

Painting

Paint coverage

Excavation

Soil, gravel, concrete

Landscaping

Sod, mulch, stone


Important Notes

  • Calculated quantities replace the current line item quantity

  • Multiple dimension rows are supported

  • Quantities can still be adjusted manually afterward

  • Map calculations depend on polygon accuracy

  • Waste configuration is optional

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