Question 1

What is the formula for speed distance time?

Accepted Answer

The three formulas are: Speed = Distance / Time, Distance = Speed × Time, and Time = Distance / Speed. They form a simple triangle: cover the variable you want to solve, and the remaining two show you what to divide or multiply.

Question 2

What units are supported?

Accepted Answer

Distance: kilometers (km), miles (mi), meters (m), feet (ft), nautical miles (nm). Speed: km/h, mph, m/s, ft/s, knots. Time: seconds, minutes, hours. The result panel shows the answer in the unit you chose, plus automatic conversions to the other common units.

Question 3

How do I convert km/h to mph?

Accepted Answer

Multiply km/h by 0.621371 to get mph, or mph by 1.609344 to get km/h. The conversion table at the bottom of the result shows the equivalent in m/s, ft/s and knots.

Question 4

Can I solve for any of the three variables?

Accepted Answer

Yes. Click the Speed, Distance, or Time tab at the top to choose which variable to solve for, then enter the other two. The calculator handles units automatically and shows the formula used.