Copper Cable Weight Calculator
Estimate bare copper conductor weight, jacketed shipment weight, reel count, scrap value, and pull load for building wire, feeders, grounding cable, coax, and data cable.
THHN/THWN
Common building wire. Copper weight comes from AWG size; total cable weight usually adds 8% to 18% for insulation.
Service Cable
SER and SEU assemblies include multiple conductors plus jacket. Shipping weight can run 20% to 35% above copper weight.
Data Cable
Cat6 uses eight small copper conductors. Total box weight is dominated by copper, separators, jacket, and sometimes shielding.
Coax
RG-6 includes center conductor, braid, foil, dielectric, and jacket. Use the profile allowance for practical pull weight.
| Conductor size | Copper area | Bare copper weight per 1000 ft | Typical home lab or power use |
|---|---|---|---|
| 18 AWG | 0.823 mm2 | 4.92 lb | Signal, thermostat, alarm, control wire |
| 14 AWG | 2.08 mm2 | 12.4 lb | 15 A branch circuit and device wiring |
| 12 AWG | 3.31 mm2 | 19.8 lb | 20 A branch circuit, rack receptacles |
| 10 AWG | 5.26 mm2 | 31.4 lb | 30 A circuit, UPS input, EV control |
| 6 AWG | 13.3 mm2 | 79.5 lb | Subpanel feeder, inverter, large UPS |
| 2 AWG | 33.6 mm2 | 201 lb | Large subpanel and short service feeder |
| 4/0 AWG | 107 mm2 | 640 lb | Service entrance and high-current DC bus |
| 500 kcmil | 253 mm2 | 1511 lb | Commercial feeder, generator, main service |
| Cable profile | What the allowance covers | Default jacket factor | Best use in calculator |
|---|---|---|---|
| Bare copper conductor | No insulation or jacket | 0% | Ground wire, bus jumper, scrap copper weight |
| THHN/THWN single conductor | Thermoplastic insulation and nylon cover | 12% | Conduit pulls and panel feeders |
| NM-B or Romex assembly | Multiple insulated conductors, bare ground, outer jacket | 28% | Branch circuit cable shipment planning |
| SER/SEU service cable | Large conductors, neutral, jacket, fillers | 32% | Service entrance or feeder reels |
| Fine-strand welding cable | Flexible strand path and rubber jacket | 22% | Battery, inverter, and portable leads |
| Cat6 or Cat6A data cable | Eight conductors, separator, shield on Cat6A, jacket | 55% to 80% | Ethernet boxes, bundles, tray load |
| RG-6 coaxial cable | Center conductor, braid, dielectric, jacket | 70% | Camera, modem, OTA antenna pulls |
| Project size | Example input | Likely result | Planning note |
|---|---|---|---|
| Small rack branch circuit | 12 AWG, 3 conductors, 75 ft | About 4.9 lb copper | Good for estimating scrap and conduit pull weight |
| Home office Cat6 bundle | 8 conductors, 1000 ft box | About 15 to 25 lb cable | Real box weight varies by copper-clad aluminum avoidance |
| Detached garage feeder | 2 AWG, 4 conductors, 125 ft | About 100 lb copper | Handling matters before conduit fill does |
| Solar inverter DC pair | 6 AWG, 2 conductors, 180 ft | About 32 lb copper | Add slack for combiner and service loops |
| Service entrance cable | 4/0 AWG, 3 conductors, 80 ft | About 169 lb copper | Order and lift by reel, not by memory |
| Formula or standard | Value used | Metric equivalent | Why it matters |
|---|---|---|---|
| Copper density | 8.96 g/cm3 | 8960 kg/m3 | Basis for conductor mass from area and length |
| AWG area | 1 circular mil = 5.067e-10 m2 | 1 kcmil = 0.5067 mm2 | Converts AWG and kcmil to copper area |
| Copper weight shortcut | lb/1000 ft = kcmil x 0.00303 | kg/m = mm2 x 0.00896 | Fast check against the calculator output |
| NEC style planning | Count conductors separately | Same conductor count | Neutral, ground, drain, and parallel pulls change weight |
| Reel handling | User limit in lb | User limit in kg | Prevents one cable order from becoming one impossible lift |
When planning a copper cable run, one of the first considerations is the physical weight of that copper cable. The physical weight of the copper cable will impact a variety of aspect of the installation project. For instance, the physical weight of the copper will impact how the reels are handle, and the physical weight of the copper will impact the scrap value of the copper at the end of the project.
A single 4/0 service entrance reel can weigh more than five hundred pounds when the weight of the jacket and the fillers is also include. As a result of the weight of the copper cable, the way in which the material is delivered to the job site will have to change. Additionally, where the material is staged will have to change.
Why Copper Cable Weight Matters
Even whether or not a cart will be needed on the job site will have to be change. The weight of the copper cable is not just the weight of the copper alone. The thickness of the insulation, the thickness of the cables jacket, and the type of stranding can all contribute to the total weight of the installed cable.
For example, a cable like THHN may have a jacket that adds twelve percent to the weight of the cable, but shielded Cat6A cable may have a jacket that adds eighty percent to the total weight. Such difference in weight impact whether or not a service elevator or shelf can handle the delivery of the copper cable. Using the calculator within this tool will allow the planner to accurately calculate the weight of the copper cable without having to refer to various tables.
The length of the required copper cable will also impact the total weight of the copper cable. Because the length of the copper cable will often have to account for slack, the total length of the required cable will be longer than the length that is calculated for the job. Most commonly, a ten percent margin for slack is added to the total length of the copper cable.
By adding this percent to the total length of the copper cable, the number of units of copper that is required will increase. The weight of that increased amount of copper will have to be accounted for prior to selecting a size of reel. Additionally, the extra copper that is provided for slack will impact the scrap value of the copper; the length of copper that can be recycled will change as a result.
The number of parallel runs of the cable, and whether it will include ground conductors will also impact the total weight of the copper cable. For example, a three-phase power feeder may only include three separate current-carrying conductors on a wiring diagram, but it will also include a ground conductor. Additionally, data cables may include eight separate data conductors within a single jacket.
Thus, if the data cable is counted as a single line item, it will undercount the amount of copper that is within that cable. If each individual strand within the data cable is counted separately, however, the weight of the copper will match what is available to be delivered on the pallet. The weight of the copper cable will be limited by the number of pounds that certain materials can hold when the copper is being delivered to the jobsite.
For instance, the target weight for a reel may be five hundred pounds. The weight of the copper and the weight of the jacket may add up to six hundred and twenty pounds to that total. In this instance, splitting the order for the copper cable into two separate reels will be required.
This change to the order impact the delivery of the copper cable; it will change the staging area of the copper cable at the jobsite. These considerations will be noted within the tool; it will indicate whether the copper cable will be delivered with carts or jacks. The scrap value of the copper will change based on the copper recovery value for copper.
This value will change based on the market for copper. It is important to calculate the weight of the copper with the current scrap rate for copper; this will ensure that the planner is aware of the scrap value of the copper and whether it is worth segregating from other metal at the jobsite. The price for copper will be calculated separately from the weight of the copper; this ensures that even if the weight of the jacket has no value, the copper will still be accounted for in the total value.
It is easy to make mistakes when determining how much the copper cable will weigh for the jobsite by referring to the datasheet for the copper cable. The datasheet will have a weight for the copper cable when the copper cable is of the exact same construction as the construction to be installed. However, the datasheet will not account for the length of the copper cable, the slack of the copper cable, or the number of parallel runs of the copper cable on the jobsite.
However, the calculator within the tool allow for length, slack, and number of parallel runs to be accounted for while maintaining the density and area of the copper. Copper has a specific density. Coppers density is eight point nine six grams per cubic centimeter.
This can be translated to pounds per thousand feet of copper by knowing the cross-sectional area of the copper. For most jobs, it is a shortcut to multiply the kcmil of the copper by point zero zero three zero three; however, the full calculation is the most accurate method of calculating the weight of the copper cable. If the copper cable has a metric size, such as on an inverter datasheet or imported electric equipment, it is also common to have to convert square millimeter to kcmil to make certain that the weight of the metric copper cable can be compared with the weight of domestic copper cable.
The unit toggle will allow for these conversions to occur, and it will ensure that no errors are made in the calculation of the copper cables weight; a 35 square mm conductor is not the same as a 2 AWG conductor. There may be additional notes regarding the handling of the copper cable. For instance, a long pull of the copper cable may be within the limits of the weight of the reel that is to be used to deliver the copper cable.
However, the long pull may be too great of a length to be delivered without intermediate support. Alternatively, a short and heavy service entrance cable may only require one reel. However, the weight of that short and heavy cable may still require the use of a lift gate to deliver the copper to the jobsite.
While the weight of the copper cable will not account for these variables, the consideration of the weight of the copper cable is what starts the planner in the right direction to asking the questions that are necessary to ensure that the copper cable will arrive at the jobsite in a timely manner. Thus, the weight of the copper cable, the weight of the insulation, the weight of the slack, and the weight of the number of conductors that are to be installed all play a vital role in determining whether the copper cable will arrive smoothly at the jobsite or whether it will create a bottleneck in the installation of the electrical service. You should of checked the weight more carefully, because its easy to miss things.
One of the most common mistakes is when people forget that the weight of the cables include the insulation. Actually, most people dont realize how much weight those extra parts can add. When you look at the totals, you’ll see it adds up to alot.
