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Gear Ratio Calculator >>

2012 Chevrolet Camaro ZL1 6 speed manual Gear Ratios Calculator, MPH, Top Speed

 


This calculator outputs the how fast the Chevrolet Camaro ZL1 can go in each gear as calculated by the gear ratios, engine redline and tire size.
The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car.

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Tire Size
(345/30/20)
/ -
OR
Tire Diameter
(inches)
 
Final Drive Ratio
Redline (RPM)
1st Gear
2nd Gear
3rd Gear
4th Gear
5th Gear
6th Gear
7th Gear
8th Gear

RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear 7th Gear 8th Gear
500 4.26 6.36 8.71 11.33 14.16 17.98 0 0
600 5.11 7.64 10.46 13.59 16.99 21.58 0 0
700 5.96 8.91 12.2 15.86 19.82 25.17 0 0
800 6.81 10.18 13.94 18.12 22.66 28.77 0 0
900 7.67 11.46 15.68 20.39 25.49 32.37 0 0
1000 8.52 12.73 17.43 22.66 28.32 35.96 0 0
1100 9.37 14 19.17 24.92 31.15 39.56 0 0
1200 10.22 15.27 20.91 27.19 33.98 43.15 0 0
1300 11.07 16.55 22.66 29.45 36.82 46.75 0 0
1400 11.92 17.82 24.4 31.72 39.65 50.35 0 0
1500 12.78 19.09 26.14 33.98 42.48 53.94 0 0
1600 13.63 20.36 27.88 36.25 45.31 57.54 0 0
1700 14.48 21.64 29.63 38.51 48.14 61.13 0 0
1800 15.33 22.91 31.37 40.78 50.98 64.73 0 0
1900 16.18 24.18 33.11 43.05 53.81 68.33 0 0
2000 17.03 25.46 34.86 45.31 56.64 71.92 0 0
2100 17.89 26.73 36.6 47.58 59.47 75.52 0 0
2200 18.74 28 38.34 49.84 62.3 79.12 0 0
2300 19.59 29.27 40.08 52.11 65.14 82.71 0 0
2400 20.44 30.55 41.83 54.37 67.97 86.31 0 0
2500 21.29 31.82 43.57 56.64 70.8 89.9 0 0
2600 22.14 33.09 45.31 58.91 73.63 93.5 0 0
2700 23 34.37 47.05 61.17 76.46 97.1 0 0
2800 23.85 35.64 48.8 63.44 79.3 100.69 0 0
2900 24.7 36.91 50.54 65.7 82.13 104.29 0 0
3000 25.55 38.18 52.28 67.97 84.96 107.88 0 0
3100 26.4 39.46 54.03 70.23 87.79 111.48 0 0
3200 27.26 40.73 55.77 72.5 90.62 115.08 0 0
3300 28.11 42 57.51 74.76 93.46 118.67 0 0
3400 28.96 43.28 59.25 77.03 96.29 122.27 0 0
3500 29.81 44.55 61 79.3 99.12 125.87 0 0
3600 30.66 45.82 62.74 81.56 101.95 129.46 0 0
3700 31.51 47.09 64.48 83.83 104.78 133.06 0 0
3800 32.37 48.37 66.22 86.09 107.62 136.65 0 0
3900 33.22 49.64 67.97 88.36 110.45 140.25 0 0
4000 34.07 50.91 69.71 90.62 113.28 143.85 0 0
4100 34.92 52.18 71.45 92.89 116.11 147.44 0 0
4200 35.77 53.46 73.2 95.15 118.94 151.04 0 0
4300 36.62 54.73 74.94 97.42 121.78 154.63 0 0
4400 37.48 56 76.68 99.69 124.61 158.23 0 0
4500 38.33 57.28 78.42 101.95 127.44 161.83 0 0
4600 39.18 58.55 80.17 104.22 130.27 165.42 0 0
4700 40.03 59.82 81.91 106.48 133.1 169.02 0 0
4800 40.88 61.09 83.65 108.75 135.93 172.62 0 0
4900 41.73 62.37 85.4 111.01 138.77 176.21 0 0
5000 42.59 63.64 87.14 113.28 141.6 179.81 0 0
5100 43.44 64.91 88.88 115.54 144.43 183.4 0 0
5200 44.29 66.19 90.62 117.81 147.26 187 0 0
5300 45.14 67.46 92.37 120.08 150.09 190.6 0 0
5400 45.99 68.73 94.11 122.34 152.93 194.19 0 0
5500 46.84 70 95.85 124.61 155.76 197.79 0 0
5600 47.7 71.28 97.59 126.87 158.59 201.39 0 0
5700 48.55 72.55 99.34 129.14 161.42 204.98 0 0
5800 49.4 73.82 101.08 131.4 164.25 208.58 0 0
5900 50.25 75.1 102.82 133.67 167.09 212.17 0 0
6000 51.1 76.37 104.57 135.93 169.92 215.77 0 0
RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear 7th Gear 8th Gear





Some additional information on how these are calculated:

When D is the diameter of the tire, the car moves forward a distance πD with each revolution of the tire. If there are F revolutions per unit of time, it moves forward at a speed of πD´F per unit of time. If D is in inches and F is in revolutions per minute (rpm), the above result will be in inches per minute. There are 63,360 inches in a mile and 60 minutes in an hour, so one inch per minute equals 60/63360 miles per hour or 1/1056 mph. So we have the following formula:

V(mph) = D(in) ´ F(rpm) ´ (π/1056)

In the automotive industry, the coefficient 1056/π is usually taken to be equal to 336 (exactly it is 336.1352398...) and the formula corresponding to the above is:

(mph)(gear ratio)(336) = (tire diameter in inches)(rpm)

With the above numerical approximation, both formulas are identical if we consider that (rpm)/(gear ratio) is the rate of rotation of the tires. So the "gear ratio" as the number of rotations of the driveshaft for each turn of the tire. This ratio is normally more than 1, except in overdrive gear. So, calling R the "gear ratio", your final answer is:

V(mph) = D(in) ´ F(rpm) ´ (π/1056) / R

or, approximately: V = (D ´ F) / (336 ´ R)

where V is the velocity (in mph), D the tire diameter (in inches), F the engine rpm, and R the gear ratio.

 


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