Free EV Charger Tools & Calculators

Interactive calculators, printable checklists, and ready-to-use templates — everything you need before, during, and after your EV charger installation.

Calculate, Estimate & Plan

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Installation Cost Calculator

Get a realistic total cost estimate — labor, materials, permit fees, and panel work — based on your charger, wiring situation, and state. Includes panel upgrade scenarios.

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Panel Load Calculator

Enter your home's major appliances and get an instant NEC Article 220 load analysis — can your panel handle a Level 2 charger without an upgrade?

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Charging Time Calculator

Select your vehicle from 18+ popular EVs and see exact charging times for Level 1, Level 2 (32A), and Level 2 (48A) — plus miles added per hour overnight.

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Wire Sizing Calculator

Select your charger amperage and installation environment and get the exact wire gauge, breaker size, conduit spec, and ground wire required by NEC 2026.

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Permit Readiness Checker

Answer 5 questions about your charger, wiring, property, and state. Get an instant assessment of what permits you need, typical costs, and timeline.

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Printable PDFs & Templates

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Permit Prep Checklist

Everything to gather before applying for your permit — one printable page you can bring to the building department or share with your electrician. Includes a notes section for local permit office details.

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Pre-Inspection Checklist

Walk through your installation before the inspector arrives. Covers all 8 items inspectors check — wire gauge, GFCI, grounding, mounting, weatherproofing, labeling, and more.

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Permit Application Worksheet

Fill-in-the-blank worksheet covering all the information your building department will ask for. Fill on screen or print blank. Includes a description-of-work template.

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HOA Request Letter Template

Formal HOA approval request letter with your state's right-to-charge statute pre-cited. Fill in your details on screen, then print or save as PDF. Works for 15+ states.

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Not Sure Where to Start?

If you're just beginning the process, start with the Permit Readiness Checker — it tells you whether you need a permit and gives you a timeline and cost estimate in about 60 seconds. Then download the Permit Prep Checklist to organize everything before you apply.