📦 Size to Weight Calculator
Calculate weight from dimensions and material density
Material density in pounds per cubic foot
How to Use This Calculator
Enter Dimensions
Input the length, width, and height of the rectangular box in feet.
Select Material Type
Choose a material type from the list (water, concrete, steel, aluminum, wood, etc.) or select "Custom Density" to enter your own density.
Enter Density
If selecting a material type, density is automatically set. If using custom density, enter the material density in pounds per cubic foot.
Calculate and Review
Click "Calculate Weight" to see weight in pounds, kilograms, and tons, plus volume calculations. Use this for shipping, handling, and material planning.
Formula
Volume (cu ft) = Length × Width × Height
Weight (lbs) = Volume × Density
Weight (kg) = Weight (lbs) × 0.453592
Example 1: Concrete Box (2 ft × 2 ft × 2 ft, density = 150 lbs/cu ft)
Step 1: Volume = 2 × 2 × 2 = 8 cu ft
Step 2: Weight = 8 × 150 = 1,200 lbs
Step 3: Weight (kg) = 1,200 × 0.453592 = 544.31 kg
Step 4: Weight (tons) = 1,200 / 2,000 = 0.6 tons
Example 2: Steel Box (1 ft × 1 ft × 1 ft, density = 490 lbs/cu ft)
Step 1: Volume = 1 × 1 × 1 = 1 cu ft
Step 2: Weight = 1 × 490 = 490 lbs
Step 3: Weight (kg) = 490 × 0.453592 = 222.26 kg
Step 4: Weight (tons) = 490 / 2,000 = 0.245 tons
About Size to Weight Calculator
The Size to Weight Calculator (Rectangular Box) is an essential tool for contractors, shippers, and builders who need to calculate weight from dimensions and material density. This calculator eliminates guesswork by providing weight calculations based on length, width, height, and material type or density, helping you estimate weights for shipping, handling, and material planning.
When to Use This Calculator
- Shipping Estimation: Calculate package or material weight for shipping
- Material Planning: Estimate material weights for construction projects
- Weight Estimation: Estimate weights from dimensions and material type
- Handling Planning: Determine weight for handling and lifting equipment
- Cost Calculation: Estimate shipping and handling costs based on weight
Why Use Our Calculator?
- ✅ Multiple Materials: Supports water, concrete, steel, aluminum, wood, glass, stone, brick, copper, and lead
- ✅ Custom Density: Supports custom material density for any material
- ✅ Complete Conversions: Shows weight in pounds, kilograms, and tons
- ✅ Volume Calculations: Calculates volume in cubic feet, cubic inches, and cubic meters
- ✅ Time Savings: Instant calculations eliminate manual math
Understanding Material Densities
Common Densities: Material densities vary significantly. Water has a density of 62.4 lbs/cu ft, concrete has 150 lbs/cu ft, steel has 490 lbs/cu ft, and lead has 707 lbs/cu ft. The calculator includes common material densities and supports custom densities.
Volume and Weight: Weight is calculated by multiplying volume by density. For a rectangular box, volume = length × width × height. Weight = volume × density. The calculator automatically converts between different weight units (pounds, kilograms, tons).
Applications: Use this calculator to estimate weights for shipping, handling, material planning, structural calculations, and cost estimation. Always verify actual weights with scales when possible.
Tips for Best Results
- Use Accurate Dimensions: Measure dimensions accurately for precise weight calculations
- Check Material Density: Verify material density from material specifications
- Consider Variations: Actual densities may vary—check material specifications
- Account for Packaging: Add weight for packaging materials when calculating shipping weights
- Verify with Scales: Always verify calculated weights with scales when possible
Frequently Asked Questions
How do I calculate weight from dimensions?
To calculate weight from dimensions, first calculate volume (length × width × height), then multiply by material density. For example, a 2×2×2 ft concrete box (density = 150 lbs/cu ft): Volume = 8 cu ft, Weight = 8 × 150 = 1,200 lbs. The calculator does this automatically.
What is the density of common materials?
Common material densities: Water = 62.4 lbs/cu ft, Concrete = 150 lbs/cu ft, Steel = 490 lbs/cu ft, Aluminum = 168 lbs/cu ft, Wood = 40 lbs/cu ft (average), Glass = 156 lbs/cu ft, Stone = 175 lbs/cu ft (average), Brick = 120 lbs/cu ft. The calculator includes these and supports custom densities.
How do I calculate weight in kilograms?
To convert weight from pounds to kilograms, multiply by 0.453592. For example, 1,200 lbs × 0.453592 = 544.31 kg. To convert to metric tons, divide kilograms by 1,000. The calculator automatically shows weight in pounds, kilograms, and tons.
Can I use this calculator for shipping?
Yes, this calculator is useful for estimating shipping weights. Enter package dimensions and material density to calculate weight. However, always verify actual weights with scales for shipping, as packaging, voids, and material variations affect actual weight.
What if my material is not in the list?
Select "Custom Density" and enter your material's density in pounds per cubic foot. You can find material densities in material specification sheets, engineering handbooks, or online material databases. The calculator will use your custom density for calculations.