SuperMotors Calculators
These calculators can be used to calculate relationships between various attributes involving vehicles. For most of the calculators, you can fill in all but one of the values and click the "calculate" button to have the last field determined for you. Note: These calculators are estimates only! They should not be used as hard evidence.
The following calculators are available on this page:
- Estimated horsepower (uses weight, trap speed, and horsepower)
- Estimated torque (uses horsepower, RPM, and torque)
- Estimated ET and trap speed (uses weight, horsepower, eT, and trap speed)
- Adjusted ET based on altitude (uses old ET, elevation, and new ET)
- Calculating CFM (uses engine size, RPM, and volumetric efficiency)
- Finding engine bore and stroke or displacement (uses bore, stroke, number of cylinders, and displacement)
- Converting between liters and cubic inches (uses displacement in L or ci)
- Total effective engine compression (uses naturally aspirated engine compression, boost compression, and effective engine compression)
- Finding RPM, gear ratio, speed, transmission ratio, or tire diameter at a given speed with specified gearing and/or tire sizes (uses gear ratio, speed, transmission ratio, tire diameter, and RPM)
- Tire conversion - English to Metric, and Metric to English (uses tire width, aspect ratio, rim diameter, and tire diameter)
- Finding speed with different tire sizes (uses old tire diameter, new tire diameter, speedometer reading, and actual speed)
If you have any suggestions for additional calculators, please contact us.
Estimated Horsepower |
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Estimated Torque |
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Estimated ET and Trap Speed |
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Adjusted ET Based on Altitude |
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Calculating CFM |
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Finding Engine Bore and Stroke or Displacement |
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Converting Between Liters and Cubic Inches |
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Total Effective Engine Compression |
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Finding RPM, gear ratio, speed, transmission ratio, or tire diameter |
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Tire Conversion |
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Finding Speed with Different Tire Sizes |
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