Wire Harness Engineering
Tools & Calculators

Wire Gauge Calculator
Wire Gauge Calculator

Find suitable wire size

Voltage Drop Calculator
Voltage Drop Calculator

Cable voltage loss estimate

Ampacity Calculator
Ampacity Calculator

Wire current‑carrying rating

Connector Selection Tool
Connector Selection Tool

Match connector requirements

Harness Cost Estimator
Harness Cost Estimator

Preliminary harness costing

Choose an Engineering Tool

Select a tool to start your wire harness engineering calculation. Each tool covers a specific stage of the design workflow.

Wire Gauge Calculator

Best for: Initial wire size selection

Calculate the required wire gauge based on current, cable length, and allowable voltage drop. Supports AWG and metric (mm²) units.

AWG mm² Wire Sizing
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Voltage Drop Calculator

Best for: Long cable runs and power distribution

Calculate voltage drop across electrical cables based on wire gauge, current, and cable length. Ensure safe and efficient power delivery.

Voltage Drop Cable Loss Efficiency
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Ampacity Calculator

Best for: Current‑carrying capacity evaluation

Determine the maximum current a wire can safely carry under specific conditions including insulation type, ambient temperature, and bundling.

Ampacity Current Rating Safety
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Connector Selection Tool

Best for: Connector family screening

Select the appropriate connector type based on application requirements including pin count, current rating, and environmental conditions.

Connector Pin Count Selection
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Harness Cost Estimator

Best for: Early‑stage cost planning

Estimate wire harness manufacturing costs based on wire count, connector types, assembly complexity, and production volume.

Cost Estimation Planning
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A Practical Wire Harness Engineering Workflow

These tools can support different stages of early wire harness design and project planning.

01
Wire Selection

Choose an appropriate wire size

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02
Electrical Evaluation

Check voltage drop and ampacity

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03
Connector Selection

Review electrical and environmental requirements

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04
Cost Planning

Estimate preliminary harness cost

About Wire Harness Engineering Tools

This tool suite is designed to support electrical engineers, project managers, and procurement teams during the early stages of wire harness design. Each calculator addresses a specific engineering decision point — from selecting the correct wire gauge for a given current and distance, to verifying voltage drop limits, checking ampacity under real‑world conditions, choosing the right connector, and estimating preliminary production costs. Use these tools individually or follow the suggested workflow for a structured design process.

These tools use standard electrical engineering formulas and commonly referenced engineering data. Depending on the application, final wire and component selection should be verified against applicable standards, manufacturer specifications, and customer requirements.

Engineering Note: Results are intended for preliminary engineering evaluation and project planning. Final component selection and production specifications should be verified against applicable standards, component datasheets and project‑specific requirements.

Engineering Reference

Explore related wire harness engineering guides and technical resources.

Wire Gauge Selection Guide — How to Choose the Right AWG Understanding Voltage Drop in Electrical Cables Ampacity Rating Explained: Tables and Real‑World Factors Connector Selection for Wire Harness Applications Wire Harness Cost Factors: Materials, Labor, and Complexity

Frequently Asked Questions

Wire gauge selection depends on several factors: the expected current load, supply voltage, wire length, acceptable voltage drop, ambient temperature, installation conditions, and applicable standards. Start by determining the minimum current requirement, then use the Wire Gauge Calculator to find a suitable size that also accounts for voltage drop over the cable run length.

Excessive voltage drop can lead to equipment malfunction, reduced efficiency, and potential overheating. Current, conductor resistance, wire length, and system voltage all affect voltage drop. A commonly used design guideline is to keep voltage drop within approximately 3‑5% of the supply voltage, but the acceptable limit depends on the application and system requirements. Use the Voltage Drop Calculator to check your cable run.

Ampacity is the maximum current a conductor can carry continuously without exceeding its temperature rating. It is influenced by wire gauge, conductor material, insulation type, ambient temperature, cable bundling, and installation conditions. The Ampacity Calculator helps you evaluate safe current levels for your specific application.

Connector selection involves multiple criteria: pin count, current rating, voltage rating, operating temperature range, IP rating (environmental protection), locking mechanism, mechanical retention requirements, and the specific application environment (automotive, industrial, medical, etc.). The Connector Selection Tool can help you compare options based on these parameters.

Wire harness cost is determined by wire length and type, connector quantity and specification, terminal type, assembly complexity, production volume, testing requirements, and any special processes such as shielding or custom labeling. The Harness Cost Estimator provides a preliminary estimate based on these inputs.

These tools are designed for preliminary engineering evaluation, project planning, and early‑stage comparison. Final production specifications should be verified against engineering drawings, component datasheets, applicable standards, customer requirements, and manufacturing constraints. They are a starting point for design decisions, not a replacement for detailed engineering validation.

Need Help With Your Wire Harness Project?

Our engineering team can help review your wire, connector, electrical and manufacturing requirements and develop a production‑ready custom wire harness solution.

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