Pricing

Tools priced by how seriously you size.

Start free. Upgrade when you start billing your time against it.

Try it

Free

$0forever

For occasional sizing and exploring the methodology.

LV cable sizing · Unlimited
Voltage drop check
AI assistant · 50/mo
Calculation history · last 10
Short circuit
Motor sizing
PDF export
ABC, Busbar

Practising engineers

Pro

$12.99/month

For engineers who need the full BS7671 toolset.

Everything in Free
Unlimited LV sizing
AI assistant · 500/mo
Short circuit · Motor sizing
Aluminium sizing
PDF report export
Unlimited history
ABC calculator
Busbar sizing

Consultancies

Business

$34.99/month

For design firms needing every tool, with team access.

Everything in Pro
AI assistant · 3,000/mo
ABC cable (NFC 33-209)
Busbar sizing (Cu & Al)
Multi-user team access
API access
Priority support
Custom branding on reports

Compare

Full feature table

Feature

Free

Pro

Business

LV cable sizingBS7671 4D1–4E5

Unlimited

Voltage drop checkSec 525

AI assistantClaude

50/mo

500/mo

3,000/mo

Short-circuit calcIPSSC + adiabatic

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Motor cable sizingkW · η · cos φ

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Aluminium cables

—

PDF report exportCalculation sheet

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History

Last 10

Unlimited

ABC cableNFC 33-209

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Busbar sizingCu · Al

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Team accessMulti-user

—

API access

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Questions

Frequently asked

All prices in USD · Cancel anytime · 7-day free trial on Pro and Business