1. What is the Weight Calculator?

Definition: The Weight Calculator determines the weight (\(W\)) of a solid rod using the formula \(W = \gamma \cdot A \cdot L\), converting the result to pounds (lb) and kilograms (kg).

Purpose: Assists engineers in calculating the weight of rods, pipes, or bars based on material properties.

Reference:Applied Strength of Materials for Engineering Technology

http://www.etcs.pfw.edu/~dupenb/ET_200/Applied%20Str%20of%20Mat%20for%20ET%20v14%20July%202018.pdf

2. How Does the Calculator Work?

Formula:

Where:

• \(W\): Weight (lb, kg)
• \(\gamma\): Specific weight of the material (lb/in³)
• \(A\): Cross-sectional area (in², calculated as \(\frac{\pi d^2}{4}\))
• \(L\): Length (in)

Steps:

• Step 1: Input Specific Weight. Enter the specific weight (e.g., 0.284 lb/in³).
• Step 2: Input Diameter. Enter the diameter (e.g., 2 in).
• Step 3: Input Length. Enter the length (e.g., 3 ft).
• Step 4: Calculate. The calculator converts units and computes weight in lb and kg.

3. Importance of Weight Calculation

Calculating weight is crucial for:

• Material Selection: Ensures structural components meet weight requirements.
• Design Safety: Prevents overloading due to excessive weight.
• Unit Consistency: Supports conversions from lb/in³ to N/m³ and various length units.

4. Using the Calculator

Example: Specific Weight = 0.284 lb/in³, Diameter = 2 in, Length = 3 ft:

• Step 1: \(\gamma = 0.284 \, \text{lb/in}^3\).
• Step 2: \(d = 2 \, \text{in}, A = \frac{\pi (2)^2}{4} \approx 3.14 \, \text{in}^2\).
• Step 3: \(L = 3 \, \text{ft} = 36 \, \text{in}\).
• Step 4: \(W = 0.284 \cdot 3.14 \cdot 36 \approx 32.1 \, \text{lb}, 14.56 \, \text{kg}\).

5. Frequently Asked Questions (FAQ)

Q: What is weight?
A: Weight is the force exerted by a material due to gravity, calculated from its volume and specific weight.

Q: Why convert units?
A: The calculator ensures consistent units (lb/in³ and inches) for accurate results and provides output in kg.

Q: Is this accurate for all rods?
A: Yes, if the specific weight, diameter, and length are correctly measured.