Wire weight calculator

Tip: choose "ft-in" to enter feet and inches separately.

Choose material preset or enter custom density. (Default: Copper = 8.96 g/cm³)

Currency affects formatting; numbers won't be auto-converted between currencies.

Results

Total Weight
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Weight per meter
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Weight (kg)
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Estimated Cost
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In kg: --
In lb: --

Wire Weight Calculator guide

Table of Contents

Introduction

Accurate wire weight measurement is crucial for industries ranging from construction to electronics. Knowing the exact weight allows you to estimate transport costs, plan installations, and predict structural loads.

This guide explores every detail you need to calculate wire weight with confidence. Whether you are a hobbyist or a professional, understanding these calculations helps in both cost planning and safety.

Understanding Wire Weight

Wire weight is determined by the wire’s length, diameter, and material density. These three parameters combine to define the volume and, consequently, the overall mass of the wire.

A thicker wire with higher density material will always weigh more than a thinner wire of the same length.

  • Length increases weight proportionally.
  • Diameter affects cross-sectional area, impacting volume.
  • Material density determines weight per unit volume.

Formula for Wire Weight

The weight of a cylindrical wire can be derived using its geometric properties. The following formula provides a direct method to calculate it:

Weight = π × (Diameter / 2)² × Length × Density

Here, the diameter and length must be in consistent units, and the density should match the unit system for accurate results.

Practical Examples

Below are five examples illustrating real-world calculations using different materials and measurements.

  • Example 1: Copper wire, 10 m length, 5 mm diameter, density 8.96 g/cm³ gives a weight of about 1.76 kg.
  • Example 2: Aluminum wire, 50 ft length, 0.25 in diameter, density 2.70 g/cm³ gives a weight of around 0.95 kg.
  • Example 3: Steel wire, 15 m length, 8 mm diameter, density 7.85 g/cm³ gives a weight of about 5.93 kg.
  • Example 4: Brass wire, 20 m length, 3 mm diameter, density 8.40 g/cm³ gives a weight of about 1.19 kg.
  • Example 5: Silver wire, 5 m length, 2 mm diameter, density 10.49 g/cm³ gives a weight of about 0.16 kg.

Key Factors Affecting Wire Weight

Even small changes in measurement units can lead to significant differences in the result. Always double-check your units before entering them into the calculator.

Temperature can slightly expand or contract wire dimensions, though in most cases this is negligible for everyday applications.

Common Material Densities

The table below lists popular materials and their average densities used in wire production.

MaterialDensity (g/cm³)Application
Copper8.96Electrical wiring
Aluminum2.70Power cables
Steel7.85Construction
Brass8.40Decorative wiring
Silver10.49High-end electronics
Gold19.30Luxury electronics
Titanium4.50Aerospace

These densities are averages and may vary slightly depending on purity and manufacturing processes.

Unit Conversion Reference

Converting between units is essential for accurate calculations. The following table provides quick references for common conversions.

FromToFactor
1 mcm100
1 mmm1000
1 ftm0.3048
1 inm0.0254
1 kglb2.20462
1 g/cm³kg/m³1000
1 lb/ft³kg/m³16.018

Always ensure that you convert all inputs into the same measurement system before applying the formula.

Cost Estimation Table

Estimating the cost requires knowing the price per kilogram. The table below shows sample costs for various materials assuming $5 per kilogram.

MaterialWeight (kg)Cost ($)
Copper15
Aluminum15
Steel15
Brass15
Silver15
Gold15
Titanium15

Practical Tips and Uses

Always measure wire length after cutting to ensure accuracy. A small miscalculation can lead to unexpected cost overruns.

When calculating cost, include a small allowance for waste material, especially when purchasing large quantities.

  • Double-check diameter with a precise caliper.
  • Use consistent units to avoid conversion errors.
  • Record all measurements for future reference.

FAQs