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BETA VERSION

🚘 The New AutoCompanion CalculatorStill free. Now even better.

Hi, I'm Sina, founder of AutoCompanion. Over the last 5 years, I've helped guide over 30,000 car deals through our concierge service. Along the way, I saw how hard it was for everyday shoppers to access real numbers — to understand how leasing works, what's a good deal, and how the math actually breaks down. So I built a tool. A free tool. The AutoCompanion Calculator launched years ago as a way to give people the same clarity I had behind the scenes — and it quickly became one of the most trusted resources for car shoppers nationwide.

🔄 Rebuilt from the Ground Up — Today, I'm proud to launch the all-new version of the calculator — rebuilt from scratch, faster, smarter, and more powerful than ever.

Still 100% free. Still for the community. Built by someone who's done this 30,000 times — for anyone who wants to shop smart, shop like a pro.

Key Features

As a free, public resource to help car shoppers pull accurate OEM lease programs. It's become one of the most popular tools of its kind, empowering users with full transparency.

Real-time OEM Data

Access live lease and finance program data directly from manufacturers for the most accurate calculations

Penny-Perfect Breakdowns

Accurate lease, finance, and cash payment calculations with complete transparency in every number

VIN Decoding

Instantly decode your vehicle's VIN for precise specs and program matching

MSD Savings Calculator

Calculate potential savings from multiple security deposits to reduce your money factor

One-Pay Lease Savings

See exactly how much you can save by paying your entire lease upfront in one payment

Mobile-Friendly Interface

Fast, responsive design with powerful new features that work perfectly on any device

Dealer-Agnostic & Ad-Free

Completely independent tool with no dealer partnerships, sponsors, or advertisements affecting your results

Save Your Deals

Save your calculations for easy tracking and future reference, or share them with dealers and family

Side-by-Side Comparisons

Compare multiple vehicles and deal structures with powerful comparison grids

Expert Pro Tips

Get insider tips throughout the process to help you secure the best possible deal

💸 Funded by Passion — Not by Profits

This tool has always been a personal project. There are no sponsors, no paywalls, and no ads. Just data and transparency.

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Three Types of Calculations

Whether you're leasing, financing, or buying with cash, our calculator has you covered

Lease Calculator

Calculate your lease payment with accurate residual and money factor data.

Key Features:

  • Accurate residual values
  • Money factor calculation
  • Tax & fees included

Finance Calculator

Calculate loan payments and total cost of financing your vehicle.

Key Features:

  • Monthly payment calculation
  • Total interest paid
  • Custom term options

Cash Calculator

Understand the total cost of ownership when purchasing with cash.

Key Features:

  • Total purchase cost
  • Registration fees
  • Tax calculation

Start Using the Calculator

Join our BETA community and help us build the most trusted auto calculator for car shoppers. Your feedback drives our improvements!

  • Real-time OEM lease & finance data
  • VIN decoding and MSD savings calculations
  • Save deals and compare side-by-side
  • Share calculations with dealers, family, and friends
  • Help shape new features with your feedback

We're actively improving based on user suggestions. Your experience helps us build better tools for everyone!

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Frequently Asked Questions

Get answers about our BETA calculator, features, and how we're building the most trusted tool for car shoppers

🚀 This product is currently in BETA

Your feedback is invaluable and much appreciated — whether it's ideas for improvements or pro tips to help others shop smarter.

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Support Us

If this calculator helped you understand your lease, save money, or feel more confident walking into a dealership — I'd be incredibly grateful for your support.

Every donation helps cover the real costs of hosting, data access, and continued improvements.

Funded by Passion

It's taken tens of thousands of dollars to rebuild this calculator from the ground up, and it costs thousands each month to keep it running. All costs are funded from our concierge service, because I believe every shopper deserves a fair shot.

For the Community

Over 30,000 car deals have been guided through our platform, helping everyday shoppers access the same clarity that dealers have. Your support helps us maintain this as a completely free, ad-free, and independent resource for car shoppers nationwide.

No sponsors, no paywalls, no ads — just data and transparency.

No pressure — just appreciation.