The **Initial Velocity **calculator uses the equation (v_{i} = v_{f} - at) to compute the initial velocity (**v**_{i}) of an object prior to constant acceleration (**a**) for a period of time (**t**) based on the final velocity (**v**_{f}).

**INSTRUCTIONS:** Choose units and enter the following:

- (
**v**_{i}) initial velocity at time t = 0
- (
**t**) time elapsed after t = 0
- (
**a**) constant acceleration value

**Initial Velocity (v**_{i}): The calculator computes the initial velocity(v_{f}) in meters per second. However, this can be automatically converted to compatible units via the pull-down menu.

#### The Math/Science

The formula for the initial velocity is:

vi = vf - a•t

where:

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