The Brass Round Bar Weight Calculator is a simple and reliable tool that helps you find the weight of any round bar based on its diameter, length, and material density. Brass, copper, steel, and aluminium round bars are widely used in mechanical engineering, fabrication, CNC machining, and industrial production. Knowing their weight is important for cost estimation, purchasing, transport planning, and machining preparation.
This calculator removes manual mathematical effort and instantly provides accurate weight results using standard engineering formulas.
What Is a Brass Round Bar?
A brass round bar is a long cylindrical metal rod made from brass alloy. It is commonly used for:
- Precision machine parts
- Decorative and electrical components
- Plumbing fittings
- Industrial equipment
- CNC turning jobs
Brass is valued for its smooth machining, excellent corrosion resistance, and attractive golden finish.
Why You Need This Weight Calculator
Calculating the weight of brass or any metal round bar is important for several reasons:
- Accurate pricing – Brass is sold per kg, so weight decides the final cost.
- Material planning – Helps know how much raw material is needed for machining.
- Transport load calculation – Essential for courier, freight, and bulk shipments.
- Manufacturing documentation – Required for BOM (Bill of Materials) and production planning.
- Prevents over-ordering or under-ordering – Saves time and money.
How the Brass Round Bar Weight Calculator Works
The calculator uses three main inputs:
- Diameter (mm) – The outer width of the round bar
- Length (mm) – Total bar length
- Density – Depends on the chosen material (Brass, Copper, Steel, Aluminium)
Once you click Calculate, the tool:
- Converts mm to meters
- Calculates circular cross-sectional area
- Calculates the volume of the bar
- Multiplies volume by material density
- Displays the weight in kilograms
- Shows breakdown including area, volume, and density
This gives a professional and transparent result.
Weight Calculation Formula
Below is the same engineering formula:
- Convert mm to meters
diameter = dia_mm / 1000
length = len_mm / 1000 - Cross-sectional area of the round bar
area = 3.1416 * (diameter / 2) * (diameter / 2) - Volume of the bar
volume = area * length - Final weight
weight_kg = volume * density
Material density values:
Brass = 8520 kg/m³
Copper = 8960 kg/m³
Steel = 7850 kg/m³
Aluminium = 2700 kg/m³
Example Calculation
Let’s calculate the weight of a 20 mm diameter brass round bar with 1000 mm length:
Step 1: Convert to meters
diameter = 0.02 m
length = 1 m
Step 2: Calculate area
radius = 0.01 m
area = π × radius² = 3.1416 × (0.01 × 0.01)
area ≈ 0.000314 m²
Step 3: Find the volume
volume = 0.000314 × 1
volume = 0.000314 m³
Step 4: Apply brass density
weight = 0.000314 × 8520
weight ≈ 2.67 kg
This means a 20 mm × 1 meter brass rod weighs about 2.67 kg.
Advantages of Using This Calculator
This tool gives you several benefits:
- Accurate engineering-grade calculations
- Supports multiple materials (Brass, Steel, Copper, Aluminium)
- Saves time for engineers & fabricators
- Useful for quotations, billing, and purchasing
- Works directly in your browser-no installation needed
Common Applications
Brass round bars are used in:
- CNC machining and lathe turning
- Electrical & electronic components
- Industrial fittings
- Decorative hardware
- Marine and plumbing industries
- Precision tools & fasteners
Accurate weight helps in all these fields for planning and costing.
FAQ – Brass Round Bar Weight Calculator
1. Is this weight exact?
It is an accurate estimate. Actual physical weight may vary slightly due to tolerance.
2. Can I use this for copper, steel, or aluminium?
Yes, simply choose the correct material from the dropdown.
3. Does it support long lengths?
Yes, you can enter any length in millimetres.
4. What density should I use for brass?
Standard brass density is 8520 kg/m³.
