The Electrical
Swiss Knife.
92 calculators and certificate templates aligned to IEC, IET, IEEE and HSE standards, with professional PDF export on every tool. Just JOLT it!
Engineering-grade tools,
built for the field
IEC & IEEE Compliant
Every calculation references the relevant international standard — results you can submit to class, certifiers and clients with confidence.
Professional PDF Export
Every tool generates a formatted, branded PDF report — ready for class submission, client handover or site records. No reformatting.
92 Tools in One App
Calculators, certificate templates, field records and inspection tools — all in a single app that fits in your pocket.
From First Principles
Jolt shows calculation steps, correction factors and standard references — not just a black-box answer. Suitable for professional sign-off and peer review.
Marine & Industrial
SOLAS emergency power, DP budgets, EX inspections, MCT penetrations — tools purpose-built for vessel and industrial environments.
Mobile First
Designed for one-handed use on deck. Large touch targets, clear readouts — built for gloves, engine rooms and low light.
92 tools. Every job covered.
From cable sizing to fire detection — professional calculators and certificate templates built to international standards.
Compliant paperwork
in seconds
Every compliance document you issue on site — from EIC to EX Inspection — pre-formatted and ready to fill. Complete the fields and export as PDF, no reformatting required.
- Inspection Certificate (IEC 60364)
- EX Inspection Certificate (IEC 60079-17 / ATEX)
- EIC — BS 7671:2018+A4:2026 (Sections A–J)
- MEIWC — Minor Electrical Installation Works Certificate
- EICR — Full IET model, C1/C2/C3 observation tables
- IR Test Record (BS 7671 Table 61)
- Schedule of Inspections — 40-item checklist
- PAT Testing Log (IET Code of Practice 5th Ed.)
Two tools, running live
These are real implementations from the Jolt source code — Load Analysis (IEC 60092-301) and Cable Sizing (IEC 60092).
| Description | kW | PF | Load Factor | Eff. kW | kVA | |
|---|---|---|---|---|---|---|
| TOTAL (after diversity × 0.85) | — | — |
| CSA (mm²) | Base Rating (A) | Derated (A) | VD (%) | Status |
|---|
What the trades say
"The load analysis tool alone saved me hours on our last vessel refit. I can present a class-ready schedule in minutes instead of rebuilding it in Excel every time."
"The certificate templates are exactly the BS 7671 A4:2026 format. I can finish an EICR on site and email the PDF to the client before I've packed up my tools."
"Cable sizing with IEC derating, voltage drop check and PDF export — all in one screen. I recommended it to my whole team on day one."
Built by engineers,
for engineers.
Jolt was born out of frustration. As a working electrical engineer, I found myself reaching for the same calculations, certificates and references every single day — scattered across spreadsheets, PDFs and memory.
So I built Jolt: a single, fast, professional tool that brings together 92 calculators and certificate templates aligned to the standards engineers actually work to. No bloat. No subscriptions to do your job. Just the tools you need, when you need them.
Jolt is designed for marine and industrial electrical engineers operating in the real world — on vessels, in switchrooms, on site — where accuracy matters and time is short.
92 tools. One app.
Built for the field.
IEC, IET, IEEE and HSE aligned calculators and certificate templates — with professional PDF export on every tool. Enter your email and be first in line.