Speed, Distance and Time Calculator
Solve for any variable in the motion equation. Convert between metric and imperial units with astronomical precision.
Calculated speed
Formula Used
Speed = Distance / Time
Units were normalized to meters and seconds for calculation.
How do I calculate speed from distance and time?
Choose the quantity to solve for and enter the other two values with matching units. Average speed is distance divided by elapsed time. The tool can also solve for distance or time, but it does not model traffic, stops, or a changing travel speed.
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How to use this calculator
Speed, Distance, & Time: The Fundamentals of Motion
Whether you're planning a road trip, tracking a sprint, or calculating the velocity of an object in freefall, the relationship between **Speed, Distance, and Time** is fundamental to understanding movement. This calculator simplifies these physics principles into a powerful, easy-to-use tool that handles all common unit conversions automatically.
In physics, speed is defined as the rate at which an object covers distance. Our tool allows you to solve for any part of the equation: `v = d / t`. By simply choosing what you want to find, you can determine how long a journey will take, how far you can travel at a specific pace, or how fast you were moving over a known distance.
Key Concepts & Definitions
Average vs. Instantaneous
This calculator determines **Average Speed**, which is the total distance divided by total time. It does not account for changes in velocity (acceleration) or stops along the way.
Units & Conversions
We support Metric (km/h, m/s), Imperial (mph, ft/s), and even Nautical (knots) units. A **knot** is one nautical mile per hour, specifically 1,852 meters per hour.