Enter the total velocity (mph) and the total weight (lbs) into the Calculator. The calculator will evaluate the Speed To Weight Ratio. 

Speed To Weight Ratio Formula

SWR = V / W

Variables:

  • SWR is the Speed To Weight Ratio (mph/lb)
  • V is the total velocity (mph)
  • W is the total weight (lbs)

To calculate Speed To Weight Ratio, divide the total speed by the weight.

How to Calculate Speed To Weight Ratio?

The following steps outline how to calculate the Speed To Weight Ratio.


  1. First, determine the total velocity (mph). 
  2. Next, determine the total weight (lbs). 
  3. Next, gather the formula from above = SWR = V / W.
  4. Finally, calculate the Speed To Weight Ratio.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total velocity (mph) = 839

total weight (lbs) = 12

FAQs

What is the significance of the Speed to Weight Ratio in vehicles?

The Speed to Weight Ratio (SWR) is crucial in determining a vehicle’s performance. A higher SWR indicates that a vehicle can achieve higher speeds with less weight, which is often desired in racing and performance vehicles for better acceleration and handling.

How can improving the Speed to Weight Ratio benefit a vehicle?

Improving the SWR can lead to better fuel efficiency, increased acceleration, and enhanced overall performance. This can be achieved by either increasing the vehicle’s power output (speed) or reducing its weight, or both.

Are there any limitations when trying to improve a vehicle’s Speed to Weight Ratio?

Yes, there are practical limitations, including the cost of lightweight materials and the engineering challenges of increasing power without significantly increasing weight. Safety regulations and the need for certain features in a vehicle can also limit how much the weight can be reduced.

Can the Speed to Weight Ratio be applied to other fields besides automotive?

Absolutely. The concept of SWR can be applied in various fields such as aerospace, where the ratio of thrust to weight is a critical factor in aircraft design, and in sports, where an athlete’s power to weight ratio can determine their speed and agility.