- Carb Size Calculator
- Gear and Shift Point Calculator
- Tire Size Calculator
- Injector Size Calculator
- Injector HP Calculator
- Injector Flow Change Calculator
- Injector Duty Cycle Calculator
- Injector Flow Units Converter
- Wire Size Calculator
- Wheel Offset Calculator
- Compression Ratio Calculator
- Speedo Gear Calculator
- Effective Compression Calculator
- Simple Ohm's Law Calculator
- Dropping Resistor Calculator
- Miles Per Gallon Calculator
- Corner Weight Calculator
- Wire Size Calculator
- Injector Size Calculator
- Valve Unseat Presure Calculator
- Bolt Circle Calculator
- Bolt Circle Distance Calculator
- Camber Offset Calculator
- Wheel Offset to Backspace Calculator
- Backspace to Offset Calculator
- Sway Bar Link Force Calculator
- Sway Bar Rate Calculator

The Collection of automotive calculators are designed to be EASY to use. These Automotive Calculators do various things to help find out common automotive questions. One thing that is a bit different is that I have them, when applicable, put up a chart or graphs to help visualize the answer. The charts are interactive and help get you a clear understanding of your options. If you have other calculators you might like to see shoot me an email at my contact page.

Click any of the images

This simple calculator will take you tire size, transmission gear ratios, and rear axle ratio and give you a detailed analysis on shift points, max speed in gear, and top speed. Nice interactive graphing too!

Click the Picture to give GearCalc a try

Give this calculator your engine size, maximum RPM and a few other bits and this will calculate a recommended carburetor size in CFM. Graphs are provided to show the spread and range of some options to help plan your choice.

Click the Picture to give CarbCalc a try

Trying to find the dimensions of a tire? Enter a few values and it will do the rest including providing revolutions per mile as a bonus!

Click the Picture to give TireCalc a try

Setting up to do your own wiring? Repairing Wiring? Well make sure the size of the wire is correct for how much current and how long the wire is. This simple calculator will as for a few bits of information and give you a GO/NO-GO on the gauge of wire you might use.

Click the Picture to give WireCalc a try

Trying to get a handle on Wheel Offsets? This calculator will help you compute changes in wheel offset and helps explain what that really means.

Click the Picture to give WheelOffsetCalc a try

Trying to find out what size injector you need?

Click the Picture to the left for the Injector Size Calculator

Trying to figure out the right Speedometer Gear? SpeedoCalc Can help with that task.

Click the Picture to give SpeedoCalc a try

Injector Unit Conversion, this is a simple one converts Lb/Hr to CC/Min and visa-versa.

Click on the picture to give the Unit Converter a try

Want a simple but accurate way to compute your engines Compression Ratio? Trying to figure out the size of your engine? CompRatioCalc will calculate the compression ratio as well as the engine displacement.

Click the Picture to give CompRatioCalc a try

Not quite sure what the use of this tool is, but some folks asked for it and being a nice guy I added it in to the mix.

Click the Picture to give Effective Compression Ratio Calculator a try

Want to find out your injectors duty cycle? Give this calculator a try.

Click on the picture to give it a go!

Want to mess with electricity? They you need to know about OHM's Law and some of the simpler formulas. This calculator will help out with them.

Click on the picture to give it a go!

Trying to make something work at a different voltage then intended? LED, Lights, Motors, etc? This simple tool will help calculate the required dropping resistor that will reduce the voltage for your device.

Click on the picture to give it a go!

This is a simple calculator for discovering you Miles Per Gallon (MPG) and related Weekly, Monthly, and Yearly average fuel cost.

Click on the picture to give it a go!

Simple and easy to use Corner Weight Calculator. Enter a few weights and the calculator will do the rest!

Click on the picture to give it a go!

Simple and easy to use calculator to see how much pressure it will take to open a valve. This is typical in applications such as waste gates or high pressure diesel applications.

Click on the picture to give it a go!

What happens when you change the pressure on you fuel injector? How do you know the new rating? This will help!

Click the Picture to the left for any for the Fuel Injector Pressure Change Calculator

Want to know how much horsepower your fuel injectors are capable of? This easy calculator will do the job for you!

Click the Picture to the left for the Fuel Injector HorsepowerCalculator

Simple and easy to use calculator a wheels or axle's bolt circle or wheel pattern. Also give suggest size if you are off in your measurements a bit!

Click on the picture to give it a go!

Simple and easy to use calculator a wheels or axle's bolt circle or wheel pattern. This is the inverse of the Wheel Bolt Circle Calculator above. Given the Bolt Circle it gives the distance to across the 2 studs (center to center)

Click on the picture to give it a go!

Want to know how much more room you will have at the top of your tire if you add negative camber? Those questions and many more can be answered with this simple camber calculator.

Click on the picture to give it a go!

Trying to fit a new set of rims? Need to figure out how the Offset relates to the Backspace? This simple calculator is for you.

Click on the picture to give it a go!

Well if you figured out that you need to get the Offset from your wheels backspace this will do it for your. This is the inverse calculation as the Offset to Backspace calculator above.

Click on the picture on the left to give it a go!

Trying to find the forces when pressure is not put perpendicular? Don't know what that means? Check out the Sway bar link force calculator and see how force is applied.

Click on the picture on the left to give it a go!

How much force will my sway bar assembly provide? Use this simple calculator to find out.

Click on the picture on the left to give it a go!