ECalPro vs ClearCalcs [2026 Comparison]

ClearCalcs and ECalPro occupy different niches. ClearCalcs is a multi-discipline engineering platform (structural, electrical, mechanical) that covers breadth. ECalPro is an electrical engineering specialist that covers depth — 27 calculators, 4 international standards, and offline capability.

This comparison helps you decide which approach fits your engineering practice: the generalist platform or the electrical specialist.

The Fundamental Difference

ClearCalcs started as a structural engineering tool and has expanded into electrical and mechanical calculations. Its strength is putting multiple engineering disciplines under one roof with a modern interface and team collaboration.

ECalPro was built from the ground up for electrical engineering calculations. It implements four major international cable sizing standards (AS/NZS 3008, BS 7671, IEC 60364, NEC), runs 24,000+ automated tests, and works offline via PWA.

Neither approach is inherently better — it depends on your firm's needs.

Feature Comparison

Where ClearCalcs Is Better

ClearCalcs has genuine advantages for certain engineering practices.

Multi-Discipline Coverage

ClearCalcs offers 50+ structural calculators (beams, columns, connections, foundations), plus mechanical and electrical modules in one subscription. If your firm does structural, electrical, and mechanical design, one ClearCalcs subscription replaces three separate tools. ECalPro is electrical only — you would still need a structural tool.

Structural Engineering Depth

ClearCalcs' structural module is mature, well-tested, and used by thousands of structural engineers. It supports AS 1170 (Australian loading), NZS 3603 (NZ timber), AS 4100 (steel), and several other structural codes. If structural calculations are your primary workload and electrical is secondary, ClearCalcs is the more practical choice.

Modern Interface and Templates

ClearCalcs has a polished, modern interface with pre-built calculation templates that guide users through inputs. The template system is well-designed for firms that want to standardise their calculation workflow.

Team Collaboration

Both tools offer team features, but ClearCalcs has had team collaboration longer and has a more mature implementation for multi-user workflows within a single subscription.

Where ECalPro Is Better

Electrical Engineering Depth

ECalPro has 27 electrical calculators versus ClearCalcs' approximately 10 electrical modules. ECalPro covers cable sizing, voltage drop, short circuit, arc flash (IEEE 1584), motor starting, conduit fill, earthing, cable pulling, harmonics, maximum demand, transformer calculations, and more. ClearCalcs' electrical module covers the basics but lacks this depth.

International Standards Coverage

This is the most significant difference for electrical engineers. ECalPro implements four major international standards:

ClearCalcs does not implement AS/NZS 3008 cable sizing, BS 7671, or IEC 60364. For engineers who need compliance with these standards — which covers most of the world outside the US — ClearCalcs' electrical module is insufficient.

Derating Factors and Installation Methods

Cable sizing is not just about looking up a current rating. Proper cable sizing requires applying derating factors for:

• Grouping (multiple cables in proximity)
• Ambient temperature (above/below reference temperature)
• Thermal soil resistivity (buried cables)
• Installation method variations
• Depth of burial corrections

ECalPro implements full derating factor tables from all four standards with automatic factor selection based on installation method. ClearCalcs' electrical module handles basic cable sizing but does not provide the same depth of derating factor coverage.

Offline Capability

ECalPro works offline via its Progressive Web App. Calculations run locally in the browser, and results sync when connectivity returns. ClearCalcs requires an internet connection. For site engineers performing calculations in areas without reliable connectivity, this is a decisive difference.

Pricing and Accessibility

ECalPro offers a free tier with all 27 calculators (5 calculations per day, watermarked reports). ClearCalcs has no free tier — you pay from day one. ECalPro also offers PPP pricing in 42 countries. For individual engineers or engineers in developing economies, ECalPro's entry point is significantly lower.

Language Support

ECalPro supports 23 languages with fully localised interfaces and units. ClearCalcs is English only. For multinational teams or engineers working in non-English-speaking regions, this matters.

Pricing Comparison

ECalPro's Professional tier at $29/mo covers all electrical calculations across all standards. ClearCalcs' $49+/mo covers structural + electrical + mechanical. If you only need electrical, ECalPro is more cost-effective. If you need multiple disciplines, ClearCalcs may be better value despite the higher absolute price.

Real-World Scenarios

Scenario 1: Electrical-Only Consulting Firm

Winner: ECalPro. Your firm does cable sizing, voltage drop, arc flash, and protection studies. You need BS 7671, IEC 60364, and sometimes NEC for international projects. ClearCalcs cannot serve your primary workload — its electrical module does not implement these standards.

Scenario 2: Multi-Discipline Engineering Firm

Winner: It depends. If your electrical workload is basic (simple cable sizing with limited standards requirements), ClearCalcs covers structural, electrical, and mechanical in one subscription. If your electrical work requires multi-standard compliance, arc flash studies, or detailed derating factor analysis, you need ECalPro for electrical work alongside ClearCalcs for structural.

Scenario 3: Small Structural Firm with Occasional Electrical Work

Winner: ClearCalcs. Your primary workload is structural. You occasionally size a cable or check voltage drop. ClearCalcs covers your main workload and handles the occasional electrical calculation adequately. You do not need ECalPro's depth.

Scenario 4: International Consultancy

Winner: ECalPro. You work on projects across multiple countries and standards. You need AS/NZS for Australian projects, BS 7671 for UK, IEC for international, and NEC for US work. You need 23-language support for your multinational team. ClearCalcs cannot serve this requirement.

Scenario 5: Site Engineer

Winner: ECalPro. You need to run calculations on-site, sometimes without internet. ECalPro's offline PWA works in basements, tunnels, and remote locations. ClearCalcs requires connectivity.

Verdict

Choose ClearCalcs if you are a multi-discipline firm where structural is the primary workload, your electrical needs are basic (simple cable sizing without multi-standard requirements), and you want one platform for all disciplines with team collaboration.

Choose ECalPro if electrical engineering is your primary focus, you need multi-standard compliance (AS/NZS, BS 7671, IEC, NEC), you need specialist calculations (arc flash, motor starting, conduit fill, earthing), you need offline capability, or you want a free starting point to evaluate.

Frequently Asked Questions

Does ClearCalcs support BS 7671 cable sizing?

No. As of March 2026, ClearCalcs does not implement BS 7671:2018+A2 cable sizing. It has some NEC-related electrical calculations but does not cover BS 7671, IEC 60364, or AS/NZS 3008. For cable sizing to these standards, you need a dedicated electrical tool.

Is ClearCalcs good for electrical engineering?

ClearCalcs is adequate for basic electrical calculations if your primary workload is structural and electrical is secondary. It is not suitable as a primary electrical engineering tool — it lacks multi-standard coverage, arc flash calculations, detailed derating factors, and the depth that specialist tools provide.

Can ECalPro do structural calculations?

No. ECalPro is an electrical engineering specialist. It does not offer structural calculations (beams, columns, foundations) or mechanical calculations. If you need structural calculations, you need a separate tool — ClearCalcs is a strong option for that purpose.

Which is cheaper for electrical-only work?

ECalPro. The free tier provides all 27 electrical calculators at no cost. The Professional tier at $29/mo is significantly cheaper than ClearCalcs' starting price of $49+/mo — and ECalPro's electrical depth is far greater.

Should my firm use both ClearCalcs and ECalPro?

If your firm does both structural and electrical engineering, this is a practical combination. ClearCalcs handles structural with its mature 50+ calculator library, and ECalPro handles electrical with 27 specialist calculators across 4 international standards. This avoids the compromise of using a generalist tool for specialist work.

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