Enter either the time at 1.5X speed or the time at original speed into the calculator to determine the other time.

1.5 X Speed Calculator

Enter one time value to calculate the other (or enter both to check consistency)

1.5X Speed Formula

The following formulas apply when the same distance/work is performed and the speed is increased to 1.5× the original speed.

S₁.₅ = 1.5S
T₁.₅ = T₀ / 1.5
T₀ = 1.5T₁.₅

Variables:

  • S is the original speed
  • S₁.₅ is the speed at 1.5X speed
  • T₀ is the time at original speed
  • T₁.₅ is the time at 1.5X speed

To calculate the missing time, use the appropriate formula based on the time you know. (Speed cancels out in the time conversion when the distance/work is the same.)

What is 1.5X Speed?

1.5X speed refers to increasing the speed of an activity or process to 1.5 times (150% of) its original speed. This concept is often used in various contexts, such as video playback, where watching a video at 1.5X speed means the video plays 50% faster than its normal speed. Similarly, in transportation or other time-dependent activities (for the same distance/work), 1.5X speed indicates that the process is completed in two-thirds of the original time.

How to Calculate 1.5X Speed?

The following steps outline how to calculate the missing time when dealing with 1.5X speed.


  1. First, note the original speed (S) if you also want to compute the sped-up speed (optional).
  2. Next, determine one of the times: time at original speed (T₀) or time at 1.5X speed (T₁.₅).
  3. If needed, compute the sped-up speed using S₁.₅ = 1.5S.
  4. Use the appropriate time formula (T₁.₅ = T₀/1.5 or T₀ = 1.5T₁.₅) to calculate the missing time.
  5. After inserting the values 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.

Time at Original Speed (T₀) = 9 units

Time at 1.5X Speed (T₁.₅) = ?

Answer: T₁.₅ = 9 / 1.5 = 6 units