Everything you need for your Tesla

Free tools built for Tesla owners. Check your battery health, plan Supercharger routes, compare running costs, verify your warranty — and more.

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All Tesla models·Cybertruck supported·Trusted by Tesla owners worldwide

Your Tesla toolkit

Everything you need to understand, maintain, and get the most from your Tesla.

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Battery Health Calculator

Estimate your Tesla's remaining battery capacity in seconds

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Route Planner

Plan journeys with Supercharger stops along the way

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Warranty Checker

Check your Tesla warranty status and what's still covered

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Fuel Comparison

See how much your Tesla saves you vs petrol or diesel

Cost Calculator

Full cost of ownership: charging, insurance, tax, maintenance

Range Estimator

Estimate real-world range based on speed, weather, and load

Charge Calculator

Calculate Supercharger and home charging time and cost

Value Estimator

See how much your Tesla is worth right now

Maximising Battery

Tips and tools to protect your Tesla's battery long-term

EV Range & Efficiency

Understand your Tesla's efficiency and learn to improve it

How it works

1

Pick your Tesla

Select your model — we support every Tesla including Cybertruck.

2

Use the tools

Get instant results — battery health, range estimates, cost breakdowns, and more.

3

Know your Tesla better

Whether you're buying, selling, or just keeping your Tesla in peak condition.

Frequently Asked Questions

Enter the Wh/mi or Wh/km figure from your Tesla's Energy app, the projected range shown at your current charge level, and the battery percentage. The calculator derives your current usable capacity and — if you select your model — compares it to the factory spec.

From the blog

Tips, guides and deep dives for Tesla owners.

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Guides & How-To

How Much Does a Tesla Battery Replacement Cost? (2026)

Out-of-warranty Tesla battery replacement typically runs £8,000–£15,000 ($10,000–$20,000) depending on the model — but it's rarely necessary. What actually drives the cost, and how to check before you assume the worst.

6 min read
Research & Data

How Accurate Is Your Tesla's Range Estimate?

Rated range, projected range, and the number you actually get are three different figures. Here's why your Tesla's display doesn't always match reality — and how to read it correctly.

6 min read
Practical Advice

The 80% Charging Rule: When It Matters for Your Tesla (and When It Doesn't)

Charge to 80%, they say — but that advice is chemistry-specific. For LFP-equipped Teslas, it's actually the wrong habit. Here's when the 80% rule applies, and when Tesla's own guidance says to ignore it.

6 min read