20 Mar
Car Calculator

Posted by Rob Robinette in Transportation | March 20, 2015 | 5 Comments

Apk file size: 2.0 MB

Automobile Performance Math Calculator designed for the road racer, drag racer or car enthusiast.

For all of the calculations simply fill in the yellow boxes and touch 'Calculate'

The Horsepower Calculator will give HP from torque or torque from HP, HP with altitude change, Flywheel HP from Wheel HP, Wheel HP from Flywheel HP and Estimated Top Speed with Added HP.

The Dyno Correction Calculator will 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 Drag Race Calculator estimates new 1/4 Mile ET & Trap Speed at new track and/or new weather conditions, 60 Feet time from 1/4 ET, 1/4 ET from 60 Feet, 1/8 ET from 1/4 ET, 1/4 ET from 1/8 ET, 1/8 Trap Speed from 1/4 Trap Speed and 1/4 Trap Speed from 1/8 Trap Speed. It will also estimate 1/4 Mile Elapsed Time and Trap Speed from horsepower and will derive horsepower from ET or Trap Speed. Weight transfer at launch is also calculated.

Enter wheel weights into the Corner Balance Calculator and it gives Cross Weight, Cross Weight%, Wheel Correction weights, Wedge and Bite. The Wheel Correction Weights shown in the white boxes tell you how much wheel weight change is needed to get a 50% Cross Weight. Road racers and street cars should shoot for a 50% (balanced) Cross Weight.

The Fuel Economy Calculator gives miles per gallon or kilometers per liter.

The Speedometer and 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 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 size of a tire from it's sidewall markings.

#### Whats new

V2.0.3 Changed "Flywheel HP from Wheel HP" starting value.
V2.0.2 Fixed "Calculate Flywheel HP from Wheel HP" calculation.
V2.0 Predicted 1/4 Mile ET & Trap Speed at new track and/or new weather conditions added to Drag Race Calculator.
V1.8 Drag Racing Calculator gets Ideal Differential Gear Ratio calculation and 60 Feet to 1/8 ET and 1/8 ET to 60 Feet conversions.

Rob Robinette part of our Transportation and have average installs from 5000 to 10000. Last Update March 20, 2015. Google play rating is 81.4286. Current verison is 2.0.3. Actual size 2.0 MB.

#### Dakota Himmerich

Works very well The only thing I've found that's off is the flywheel HP from wheel HP calculation. For example if you put 80 in as whp and 20% drivetrain loss it gives you 96 flywheel HP while it should be 100.

#### David Crandon

Way cool App This is so cool Rob! One way it's useful for me is that to compete with my S2000 in the Porsche Owners Club I have to class my car based on power to weight ratio using SAE correction. The dyno operator mistakenly gave me a printout with STD correction. Now I can convert it!

#### Jason Paul

Great While the layout isnt the best, its app provides ample information for me to improve. Thank you for creating it!

#### Joseph Narducci

Car caculater for qma Easy set up much faster

#### Dan Lane

Major scaling bug Using a nexus 6 with cyanogenmod with the default dpi. Unfortunately when I open this app, everything is so big it doesn't fit on the screen.