MEASUREMENTMaterials & WeightConstruction Calculator
⚖️

Tonnage Calculator — Size to Weight by Material

Convert dimensions to weight using material density. Essential for shipping, structural design, and material ordering.

Concept Fundamentals
0.284 lb/in³
Steel Density
0.098 lb/in³
Aluminum
L×W×H÷166
Dim Weight
Calculate WeightEnter dimensions and material

Why This Construction Metric Matters

Why: Accurate weight estimates prevent shipping surprises and structural overload.

How: Weight = Volume × Density. Rectangular: L×W×H; Cylinder: πr²L. Dimensional weight = (L×W×H)÷166.

  • ●Steel 0.284; aluminum 0.098; oak 0.025 lb/in³
  • ●Dim weight divisor 166 domestic
  • ●Over 150 lbs typically freight
Sources:ASM HandbookMatWeb

📋 Quick Examples — Click to Load

Enter valid positive length, width, height.

Planning estimates only. Verify with a licensed engineer or contractor before construction.

📐 Construction Industry Facts

⚖️

Weight = Volume × Density; 1 ft³ = 1,728 in³

— Engineering

📦

Dimensional weight = L×W×H÷166

— Shipping

Tonnage calculator converts dimensions to weight using material density. Weight = Volume × Density. Essential for shipping, structural design, and material ordering. Steel 0.284 lb/in³; aluminum 0.098; oak 0.025; concrete 0.087. Dimensional weight = L×W×H÷166 for domestic shipping.

0.284
Steel lb/in³
166
Dim weight divisor
1728
in³ per ft³
50+
Materials

Sources: ASM Handbook, MatWeb, NIST, Shipping standards.

Key Takeaways

  • • Weight = Volume × Density; Volume = L×W×H (rect) or πr²L (cylinder)
  • • Steel 0.284; Aluminum 0.098; Oak 0.025; Concrete 0.087 lb/in³
  • • Hollow: subtract inner volume; Dim weight = L×W×H÷166
  • • Over 150 lbs = freight; over 2000 lbs = LTL/FTL

Did You Know?

🔢 Tungsten 25× heavier than cork
📊 Carriers bill max(actual, L×W×H÷166)
💡 1 ft³ = 1,728 in³ = 28.317 L
🌍 Hollow cylinder: π(R²−r²)×L × density
📈 50+ materials; custom density supported
🎯 Add 5–15% for packaging when estimating

How Does Tonnage Calculation Work?

Volume

Rectangular: L×W×H. Cylinder: π×(D/2)²×L. Hollow: subtract inner volume.

Weight

Weight = Volume × Density (lb/in³). Total = Weight × Quantity.

Shipping

Dimensional weight = (L×W×H)÷166. Carriers charge max(actual, dimensional).

Expert Tips

Use consistent units — convert all to inches before calc
Verify density — alloy grades vary 5–10%
Add 5–15% for packaging weight
Mechanical assist for items over 100 lbs

Material Density Comparison

Materiallb/in³Typical Use
Carbon Steel0.284Structural, fabrication
Stainless Steel0.289Structural, fabrication
Aluminum 60610.098Structural, fabrication
Copper0.323Structural, fabrication
Red Oak0.025Structural, fabrication
Concrete0.087Structural, fabrication
PVC0.05Structural, fabrication

Frequently Asked Questions

What is a tonnage calculator?

A tonnage calculator converts material dimensions (length, width, height) to weight using density. Weight = Volume × Density. Essential for shipping, structural design, and material ordering. Supports steel, aluminum, wood, concrete, and 50+ materials.

How do I calculate steel weight from dimensions?

Volume (in³) = Length × Width × Height. Weight = Volume × 0.284 lb/in³ for carbon steel. Example: 24×12×0.5 in plate = 144 in³ × 0.284 ≈ 41 lbs. Use metric: density in kg/m³ for steel ~7,850.

What is dimensional weight for shipping?

Dimensional weight = (L × W × H) ÷ 166 (domestic) or ÷ 139 (international). Carriers bill the higher of actual weight or dimensional weight. Lightweight bulky items often cost more by dim weight.

How do I calculate hollow cylinder weight?

Net volume = π(R² − r²) × Length. R = outer radius, r = inner radius. Weight = Net volume × density. For tube: subtract inner cylinder volume from outer cylinder volume.

When is freight required vs parcel?

Typically over 150 lbs = freight; over 500 lbs = LTL; over 2,000 lbs = full truckload. Oversize parcels (>48 in any dimension) may require freight even at lower weights. Check carrier rules.

What density should I use for custom materials?

Enter density in lb/in³. Water = 0.036; steel 0.284; aluminum 0.098; oak 0.025; concrete 0.087. Convert kg/m³ to lb/in³: multiply by 0.00003613.

Key Statistics

0.284
Steel lb/in³
166
Dim weight divisor
50+
Materials
1728
in³ per ft³

Official Data Sources

ASM Handbook ↗
Material properties
MatWeb ↗
Material density database
NIST ↗
Conversion factors
Carrier Guidelines ↗
Shipping weight rules

⚠️ Disclaimer: This calculator is for educational purposes only. Densities vary by alloy/grade. Verify for critical applications. Not for legal/shipping compliance.

👈 START HERE
⬅️Jump in and explore the concept!
AI

Related Calculators

Sealant Calculator - Caulk & Joint Filler Estimator

Calculate sealant and caulk quantity for joints, gaps, and cracks. Estimate cartridges needed based on joint dimensions and bead size.

Construction

Punch Force Calculator - Press Brake & Punching Calculator

Calculate punch force requirements for press brake operations and hole punching. Get tonnage requirements, material thickness limits, and press...

Construction

Air Changes Per Hour Calculator - Ventilation & HVAC Design

Calculate air changes per hour for proper ventilation and HVAC design. Determine if your room meets recommended ACH standards for different room types...

Construction

Air Conditioner BTU Calculator - AC Sizing & Capacity

Calculate the required BTU capacity for air conditioning based on room size, sun exposure, insulation quality, climate zone, occupants, and appliances. Get...

Construction

Aluminum Weight Calculator - Alloy Weight & Cost Estimation

Calculate the weight of aluminum materials based on dimensions, shape, and alloy type. Supports sheets, bars, tubes, angles, channels, and I-beams with cost...

Construction

Angle Cut Calculator

Calculate miter angles, bevel angles, and compound cuts for crown molding, rafters, picture frames, and trim work. Includes saw settings and visual guides.

Construction