Use this wood screw weight calculator to estimate per-screw and bulk weight by length, diameter, head height, material density, and quantity with instant results, chart, and detailed guidance.
Wood Screw Weight Calculator Inputs
Total overall length of the wood screw shank.
Major diameter across the threads.
Typical countersunk head height or pan head thickness.
Breakdown of wood screw weight by volume components and chosen material density.
Per Screw WeightBatch Weight
Bar chart compares per-screw and batch wood screw weight across shank, head, and total.
Formula (plain language): Wood screw weight = (cylindrical shank volume + cylindrical head volume) × material density. Shank volume = π × (diameter/2)² × (length – head height). Head volume = π × (diameter/2)² × head height. Density sets grams per cubic centimeter; multiply by quantity for batch weight.
What is the wood screw weight calculator?
The wood screw weight calculator is a specialized tool that estimates the mass of an individual wood screw and the total weight of a batch using dimensions and material density. Woodworkers, cabinetmakers, timber framers, and procurement teams use this wood screw weight calculator to plan hardware loads, shipping estimates, and project logistics. A common misconception is that all screws of the same length weigh the same; the wood screw weight calculator shows how diameter, head height, and material drastically change grams per screw.
Wood screw weight calculator Formula and Mathematical Explanation
The wood screw weight calculator relies on geometric volume and density relationships. A wood screw is approximated as two cylinders: the shank and the head. The wood screw weight calculator converts inputs to centimeters, computes volumes, sums them, and multiplies by the chosen density in g/cm³.
Step-by-step derivation
Convert length, diameter, and head height from millimeters to centimeters.
Calculate head volume: π × (radius)² × head height.
Total volume = shank volume + head volume.
Per screw weight = total volume × density.
Batch weight = per screw weight × quantity.
Variable
Meaning
Unit
Typical range
L
Overall screw length
mm
20-150
D
Major diameter
mm
3-10
H
Head height
mm
2-6
ρ
Material density
g/cm³
2.7-8.5
Q
Quantity of screws
count
10-1000+
Variable definitions used in the wood screw weight calculator formula.
Practical Examples (Real-World Use Cases)
Example 1: Decking screws in carbon steel
Using the wood screw weight calculator, set length to 75 mm, diameter to 5 mm, head height to 3 mm, density to carbon steel, and quantity to 350. The calculator outputs roughly 6.5 g per screw and about 2275 g for the batch, showing shipping weight under 2.3 kg and confirming the hardware fits decking load plans.
Example 2: Cabinet screws in brass
Enter 35 mm length, 4 mm diameter, 2.5 mm head height, brass material, and quantity 120. The wood screw weight calculator returns near 2.9 g per screw and around 348 g total. This helps a cabinet shop pre-pack kits and keep courier costs in a low bracket.
How to Use This wood screw weight calculator
Enter screw length, diameter, head height, quantity, and select the material.
Watch the wood screw weight calculator refresh intermediate volumes and the chart in real time.
Review per-screw grams, batch grams, and weight per 100 to plan inventory or freight.
Use Copy Results to share specs with buyers or production.
Reset to defaults when starting a new wood screw weight calculator scenario.
Key Factors That Affect wood screw weight calculator Results
Material density: brass and stainless raise grams while aluminum lowers them.
Diameter: slight increases in major diameter significantly lift volume.
Length: longer shanks scale weight linearly in the wood screw weight calculator.
Head profile: taller heads add measurable grams, especially in dense alloys.
Quantity: batch weight multiplies quickly; freight brackets depend on it.
Moisture or coatings: zinc or epoxy plating slightly increases density; consider in close-tolerance uses.
Thread form variation: aggressive threads can marginally increase metal volume.
Packaging allowances: boxes, bags, and labels add grams beyond the wood screw weight calculator output.
Frequently Asked Questions (FAQ)
Does the wood screw weight calculator account for threads? It approximates a solid cylinder; actual threads reduce a small amount of volume, so results slightly overestimate weight.
How accurate is the wood screw weight calculator for tapered heads? Tapered heads weigh a bit less than cylindrical assumptions; expect a few percent margin.
Can I use the wood screw weight calculator for drywall screws? Yes, adjust diameter and length; choose the material closest to the fastener alloy.
Why do stainless screws feel heavier? The wood screw weight calculator shows stainless density is higher than carbon steel, lifting per-screw grams.
Is aluminum suitable for structural work? Aluminum screws are lighter per the wood screw weight calculator but have lower strength; use where load is minimal.
How do coatings influence numbers? Thin coatings add minor mass; for bulk pallets, the wood screw weight calculator remains sufficiently accurate.
Can I estimate carton loads? Multiply the wood screw weight calculator batch result by the number of boxes, then add packaging.
What if my screw has a washer head? Increase head height to mirror the added metal and rerun the wood screw weight calculator.
Related Tools and Internal Resources
Fastener size guide — Dimensions to pair with this wood screw weight calculator.
Bolt torque chart — Cross-check torque once weight and grade are known.