Quantity Takeoff Calculator Skill

Purpose

The Quantity Takeoff Calculator Skill calculates construction quantities including concrete volumes, steel weights, earthwork quantities, and material takeoffs from drawings or BIM models.

Capabilities

• Concrete volume calculation
• Steel weight calculation
• Earthwork quantities
• Pipe and conduit lengths
• Area calculations (formwork, finishes)
• Unit conversion
• Waste factor application
• BIM-based takeoff

Usage Guidelines

When to Use

• Estimating project quantities
• Supporting cost estimates
• Verifying contractor quantities
• Planning material procurement

Prerequisites

• Design documents available
• Takeoff categories defined
• Unit system established
• Waste factors identified

Best Practices

• Use consistent methods
• Document measurement rules
• Apply appropriate waste factors
• Cross-check critical items

Process Integration

This skill integrates with:

• Construction Cost Estimation
• Specifications Development

Configuration

quantity-takeoff-calculator:
  categories:
    - concrete
    - steel
    - earthwork
    - masonry
    - piping
  sources:
    - bim-model
    - drawings
    - cad
  units:
    - imperial
    - metric

Output Artifacts

• Quantity summaries
• Material takeoffs
• Cost backup data
• BOM reports