🏃 Speed Calculator

Calculate speed, distance, or time using the fundamental motion formulas. Convert between different units and get step-by-step solutions.

Distance

Time

AdSense Ad Placeholder

What is the difference between speed and velocity?

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that refers to the rate at which an object changes its position. Speed only considers magnitude, while velocity considers both magnitude and direction.

How do I convert between different speed units?

Common conversions: 1 m/s = 3.6 km/h = 2.237 mph = 3.281 ft/s = 1.944 knots. Our calculator automatically handles these conversions for you.

What is average speed vs instantaneous speed?

Average speed is the total distance traveled divided by the total time taken. Instantaneous speed is the speed at a specific moment in time. This calculator computes average speed.

What is the most economical driving speed?

Most vehicles achieve optimal fuel efficiency at speeds between 45-55 mph (72-89 km/h). Speeds above 60 mph typically reduce fuel economy significantly.

How accurate are GPS speed measurements?

GPS speed measurements are generally accurate to within 0.2 mph (0.3 km/h) under ideal conditions, but can be affected by satellite signal quality, atmospheric conditions, and terrain.

What factors affect vehicle speed?

Vehicle speed is affected by engine power, aerodynamic drag, rolling resistance, road grade, weather conditions, vehicle weight, and transmission efficiency.

How do I calculate speed for circular motion?

For circular motion, linear speed = 2πr/T, where r is radius and T is period. Angular speed = 2π/T. The relationship is: linear speed = angular speed × radius.

What are typical speeds for different modes of transport?

Walking: 3-4 mph, Cycling: 12-15 mph, City driving: 25-35 mph, Highway: 55-80 mph, Commercial aircraft: 500-600 mph, High-speed rail: 150-200 mph.

Disclaimer: This calculator provides estimates for educational and planning purposes only. Results may not reflect real-world conditions due to factors like traffic, weather, terrain, and vehicle performance. Always follow local speed limits and traffic regulations. For critical applications, consult with relevant professionals.