How to use: Calculate average speed from distance and time measurements for trip planning and travel time estimation. Enter Distance (miles or kilometers traveled). Enter Time (hours, minutes, or seconds taken). Results show Average Speed in appropriate units (MPH or KPH). Formula: Speed = Distance ÷ Time. Examples: 60 miles in 1 hour = 60 MPH, 300 km in 3 hours = 100 KPH, 100 miles in 90 minutes = 66.7 MPH. Speed limits: Residential 25-35 MPH, Highway 55-65 MPH, Interstate 65-75 MPH. Used for: trip planning (how long to destination?), fuel consumption estimates, delivery time calculations, and speed limit compliance verification. Essential for logistics, travel planning, and time management.