Speed measures how quickly something moves. It tells you how much distance is covered in a certain amount of time. In the International System of Units, the metre per second (m/s) is the standard unit of speed and is defined as a distance of one metre travelled in one second【203648925713530†L177-L179】. This definition reflects the basic formula for speed: distance divided by time. For instance, if you drive 100 kilometres in two hours, your average speed is 50 km/h. Unlike velocity, which also includes direction, speed is a scalar quantity that only concerns magnitude.
Manually converting between units and calculating speeds can be confusing and error‑prone. Our online speed calculator makes these calculations quick and accurate. Whether you are planning a road trip, timing athletic performance, estimating travel times, or solving homework problems, a reliable calculator saves time and reduces mistakes. It eliminates the need to memorise conversion factors and helps you concentrate on analysing results rather than crunching numbers.
The tool above takes three main inputs: distance, time, and the units for each. You can choose from commonly used distance units (metres, kilometres, miles, feet, yards and nautical miles) and time units (seconds, minutes or hours). When you click the Calculate Speed button, JavaScript converts your distance and time into base units (metres and seconds) and divides them to obtain the speed in metres per second. It then converts this value into your chosen output unit, such as kilometres per hour, miles per hour or knots. All calculations take place locally in your browser, so your data is never sent to a server and your privacy is protected.
Speed calculations are used in many fields. Motorists estimate how long a journey will take or whether they will arrive on time. Athletes and coaches monitor running and cycling speeds to measure performance and set training goals. Engineers use speed to design machines and structures that operate safely at certain velocities. Sailors and pilots measure speed relative to water or air to navigate accurately. Even everyday tasks like measuring walking pace for fitness or determining the flow rate of a river involve calculating speed.
Speed is the magnitude of motion and tells you how fast something is travelling. Velocity includes both speed and direction. For example, 60 km/h north is a velocity, while 60 km/h alone is a speed.
To convert mph to m/s, multiply the speed by 0.44704. Conversely, multiply m/s by 2.23694 to get mph. Our calculator performs this conversion automatically.
Yes. Use decimal values such as 0.5 seconds for half a second or 0.25 minutes for 15 seconds. The calculator accepts non‑integer values.
If you leave the distance or time fields empty or set time to zero, the calculator cannot compute a valid speed. Make sure both fields contain numeric values and that time is greater than zero.
Speed is one of the simplest yet most useful concepts in physics and everyday life. It is defined by the basic formula speed = distance / time, and the metre per second unit embodies this definition exactly【203648925713530†L177-L179】. Our online speed calculator simplifies the process of converting units and computing speeds, offering flexibility and privacy for users across devices. Whether you are timing a runner, planning a trip, or solving a homework problem, this tool will help you obtain accurate results quickly. Bookmark this page and use it whenever you need to calculate speed.
Online Speed Calculator Tool – Calculate Speed Easily