Free Speed Calculator

Solve for speed, distance, or time given the other two.

This is the fundamental kinematics relationship taught in introductory physics — useful for anything from planning a road trip's arrival time to checking whether a stated speed/distance/time combination is physically consistent.

Worked Example

Example: Traveling 300 miles in 5 hours → speed = 300/5 = 60 mph.

Formula / Method

Speed = Distance / Time
Distance = Speed × Time
Time = Distance / Speed

Worked Example

Example: Traveling 300 miles in 5 hours → speed = 300/5 = 60 mph.

Formula / Method

Speed = Distance / Time
Distance = Speed × Time
Time = Distance / Speed