From engineers. For engineers.

Ampacities publishes a small, deliberate suite of electrical engineering calculators — each traceable, each typeset, each cited to its governing standard.
Enter the Library→
Chapter One · The Library

The Library
of Calculation.

N° 03 / ArcForthcoming
Arc Flash
Incident energy, arc-flash boundary, PPE category and labels per the 2018 model.
— Cited Standard IEEE 1584-2018
N° 05 / FaultForthcoming
Fault Current
Sub-transient, transient and steady-state short-circuit per IEC 60909 — balanced & unbalanced.
— Cited Standard IEC 60909-0:2016
N° 07 / TransformerForthcoming
Transformer
kVA rating, impedance, loss, regulation, taps & through-fault per ANSI/IEEE.
— Cited Standard IEEE C57.12.00-2021
N° 08 / Power FactorForthcoming
Power Factor
kVAr correction sizing, capacitor bank selection, harmonic-aware tuning.
— Cited Standard IEC 61000 · IEEE 519
N° 09 / LightingForthcoming
Lighting Design
Lumen-method illuminance, uniformity, UGR, daylight & dimming reserve.
— Cited Standard IES RP-1 · AS/NZS 1680
N° 10 / LightningForthcoming
Lightning Protection
Rolling-sphere coverage, LPL class, downconductor pitch and surge co-ordination.
— Cited Standard IEC 62305-1:2010
N° 11 / TrayForthcoming
Cable Tray
Fill ratios, weight loading, separation distances and segregation between services.
— Cited Standard NEC 392 · AS/NZS 3008
N° 12 / GeneratorForthcoming
Generator Sizing
Stand-by, prime & continuous; step-load, motor-start dip and harmonic derating.
— Cited Standard IEEE 446-1995 · ISO 8528
N° 13 / UPSForthcoming
UPS Sizing
VA / kW load profile, autonomy, redundancy topology and crest factor headroom.
— Cited Standard IEEE 1100-2005
N° 14 / BatteryForthcoming
Battery Sizing
Cell selection, Ah duty profile, ageing, temperature & end-voltage corrections.
— Cited Standard IEEE 485-2020
— A AS/NZS Standards Australia / New Zealand Wiring rules, cable selection, lighting & supply harmonisation.
— B IEEE Institute of Electrical & Electronic Engineers Arc flash, earthing, transformers, batteries, UPS and continuity.
— C IEC International Electrotechnical Commission Short-circuit calculation, lightning protection, EMC, harmonics.
— D NEC National Electrical Code · NFPA 70 North-American conductor ampacity, tray fill and overcurrent rules.
Chapter Two · The Platform

Beyond the
calculation.

B / 01 · Projects→
Projects
A folder for every engagement. Link the client, set a budget of hours and fees, and watch the work assemble itself.
  • Track work, end to end
  • Link client & jobs
  • Hours · fees budget
B / 02 · Jobs→
Jobs
A pipeline from first enquiry to a finished job — with notes, attached files and checklists waiting at every stage.
  • Enquiry → scheduled
  • In progress → complete
  • Notes · files · checklists
B / 03 · Clients→
Clients
A built-in CRM, light on its feet: contacts, sites, correspondence — and a thread back to every project and invoice on file.
  • Built-in CRM
  • Linked to projects
  • History · per client
B / 04 · Quotes→
Quotes
Itemised quotes that read like a proper letter — GST handled, a public acceptance link, and a one-click conversion to an invoice.
  • Line items · GST modes
  • Public accept link
  • Convert → invoice
B / 05 · Invoices→
Invoices
Issue, track and mark paid. Set a recurring schedule for the steady accounts, and let the rest send themselves.
  • Line items · GST
  • Recurring billing
  • Mark paid · audit
B / 06 · Timesheets→
Timesheets
Live timer for the work in front of you. Weekly and monthly views; duplicate last week with a click; invoice the uninvoiced.
  • Live timer · week / month
  • Duplicate week
  • Invoice uninvoiced hours
B / 07 · Business→
Business profile
Company details, ABN, payment terms, bank details and a GST flag — set once, applied to every quote and invoice you ever send.
  • ABN · GST flag
  • Payment terms
  • Bank · payout details
Chapter Three · The Subscription

Three stations
at the bench.

N° I / Soliste →
Soliste.
For the single practitioner.
$39 AUD · per month or $390 paid annually
  • All fifteen instruments
  • One user · unlimited saved calculations
  • PDF export · typeset audit trail
  • AS/NZS · IEEE · IEC · NEC citations
Begin Audition→
N° II / Studio Most chosen
Studio.
For the small practice.
$29 AUD · per seat · month billed annually — or $35 / seat / month
  • Everything in Soliste
  • Projects · jobs · clients
  • Quotes · invoices · timesheets
  • Up to ten seats
  • Recurring invoicing
  • Branded PDF templates
Begin Audition→
N° III / Bureau ↘
Bureau.
For the established firm.
Sur mesure. spoken for · on request
  • Everything in Studio
  • Unlimited seats
  • SSO · SAML / OAuth
  • Audit-log export
  • White-label exports
  • Custom citation profiles
  • Priority studio support
Speak with Studio↘

All prices in AUD. GST inclusive for Australian customers; ex-GST for international. The fourteen-day audition opens the full Studio tier — no card on file.