Square Footage to Tonnage Calculator

Tonnage Formula:

\[ T = \frac{A \times F}{12,000} \]

Tonnage (tons):

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1. What is a Square Footage to Tonnage Calculator?

Definition: This calculator converts square footage to tonnage for HVAC or asphalt applications using area, load factor, and a conversion divisor.

Purpose: It helps HVAC professionals and construction workers determine tonnage requirements for cooling systems or asphalt paving projects.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ T = \frac{A \times F}{12,000} \]

Where:

\( T \) — Tonnage (tons)
\( A \) — Area (square feet)
\( F \) — Load factor (BTU/hr/ft² for HVAC or lb/ft² for asphalt)
\( 12,000 \) — Conversion divisor (BTU/ton for HVAC or lb/ton for asphalt)

Explanation: The area is multiplied by the load factor to get total load or weight, then divided by the conversion factor to get tonnage.

3. Importance of Tonnage Calculation

Details: Proper tonnage estimation ensures correct HVAC system sizing for efficient cooling or accurate asphalt quantities for paving projects.

4. Using the Calculator

Tips: Enter the area in square feet, load factor (default 400 BTU/hr/ft² for HVAC), and divisor (default 12,000 BTU/ton). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between HVAC and asphalt calculations?
A: HVAC uses BTU/hr/ft² and 12,000 BTU/ton, while asphalt uses lb/ft² and 2,000 lb/ton (1 ton = 2,000 lbs).

Q2: What's a typical load factor for HVAC?
A: Residential cooling typically uses 400 BTU/hr/ft², but this varies by climate and building type.

Q3: How do I determine the load factor for asphalt?
A: Asphalt load factor depends on thickness - typically 12-15 lb/ft² per inch of thickness.

Q4: Can I use this for other materials?
A: Yes, with appropriate load factors and divisors for the specific material.

Q5: Does this include safety factors?
A: No, consider adding 10-20% to the calculated tonnage for project contingencies.