Free Android Auto Performance Calculator
Thread Starter
Former Moderator
Joined: Jul 2005
Posts: 4,634
Likes: 28
From: West Virginia
Free Android Auto Performance Calculator
I just published a free android automobile performance calculator. Let me know if you find any errors or have suggestions for improvement. The corner balance feature is worth the download alone.
Automobile Performance Calculator designed for the road racer, drag racer and car enthusiast.
This app has 13 pages of calculators:
Enter wheel weights into the Corner Balance Calculator and it gives Cross Weight, Cross Weight%, Wheel Weight Corrections, Wedge and Bite.
The Drag Race Calculator estimates Elapsed Time (ET) and Trap Speed from horsepower and will derive horsepower from ET or Trap Speed. It will also give weight transfer at launch.
The Horsepower Calculator will give HP from torque or torque from HP, HP at altitude, Flywheel HP from Wheel HP, Wheel HP from Flywheel HP and Estimated Top Speed with Added HP.
The Dyno Correction Calculatorwill give SAE, MSA and STD correction factors and calculate corrected horsepower.
The Torque Calculator will give Drive Wheel Torque, Wheel Thrust, Acceleration and Weight Transfer.
The Fuel Economy Calculator gives miles per gallon or kilometers per liter.
The Speedometer & Odometer Calculator will calculate their error rates.
The Conversions Calculator will convert both ways: Miles/Kilometers, Foot-Pounds/Inch-Pounds, Foot-Pounds/Newton-Meters, PSI/BAR.
The Weight Transfer Calculator will give Front-to-Rear and Lateral Weight Transfer.
The Alignment Calculator will convert Toe Inches to degrees and Toe degrees to Toe Inches.
The Skid Pad g Calculator will give Average Lateral g around a skid pad.
You can also calculate Brake Specific Fuel Consumption, Engine Air Capacity and estimate the diameter and width of a tire from it's sidewall markings.
The Car Calculator[sup]©[/sup] is free and available in the Google Play Store. Searching for 'Rob Robinette' is the easiest way to find it in a sea of car 'financial' calculators. You can also download the latest version directly: Car Calculator for Android apk
Automobile Performance Calculator designed for the road racer, drag racer and car enthusiast. This app has 13 pages of calculators:
Enter wheel weights into the Corner Balance Calculator and it gives Cross Weight, Cross Weight%, Wheel Weight Corrections, Wedge and Bite.
The Drag Race Calculator estimates Elapsed Time (ET) and Trap Speed from horsepower and will derive horsepower from ET or Trap Speed. It will also give weight transfer at launch.
The Horsepower Calculator will give HP from torque or torque from HP, HP at altitude, Flywheel HP from Wheel HP, Wheel HP from Flywheel HP and Estimated Top Speed with Added HP.
The Dyno Correction Calculatorwill give SAE, MSA and STD correction factors and calculate corrected horsepower.
The Torque Calculator will give Drive Wheel Torque, Wheel Thrust, Acceleration and Weight Transfer.
The Fuel Economy Calculator gives miles per gallon or kilometers per liter.
The Speedometer & Odometer Calculator will calculate their error rates.
The Conversions Calculator will convert both ways: Miles/Kilometers, Foot-Pounds/Inch-Pounds, Foot-Pounds/Newton-Meters, PSI/BAR.
The Weight Transfer Calculator will give Front-to-Rear and Lateral Weight Transfer.
The Alignment Calculator will convert Toe Inches to degrees and Toe degrees to Toe Inches.
The Skid Pad g Calculator will give Average Lateral g around a skid pad.
You can also calculate Brake Specific Fuel Consumption, Engine Air Capacity and estimate the diameter and width of a tire from it's sidewall markings.
Joined: Apr 2009
Posts: 2,629
Likes: 42
From: Windsor, CA
Seems like the Flywheel to Wheel HP and vice versa calculators don't quite agree with each other. 305 flywheel HP calculates 256.2 whp, but 256.2 whp calculates to 297 flywheel HP.
Other than that, very cool little calculator for cars. Thank you for making it!
Other than that, very cool little calculator for cars. Thank you for making it!
Thread Starter
Former Moderator
Joined: Jul 2005
Posts: 4,634
Likes: 28
From: West Virginia
What's an iPhone? 
That's an artifact of percentage change, i.e. a stock gains 50% then loses 50% it doesn't drop to the original price.
Seems like the Flywheel to Wheel HP and vice versa calculators don't quite agree with each other. 305 flywheel HP calculates 256.2 whp, but 256.2 whp calculates to 297 flywheel HP.
That's an artifact of percentage change, i.e. a stock gains 50% then loses 50% it doesn't drop to the original price.
Thread Starter
Former Moderator
Joined: Jul 2005
Posts: 4,634
Likes: 28
From: West Virginia
I added a Dyno Correction Calculator which gives SAE, MSA and STD correction factors and calculates corrected horsepower. It's listed on the app's main menu. The corrections include humidity.
