The speed–distance–time triangle
The three quantities are linked by one relationship you can rearrange three ways:
Speed = Distance ÷ Time
Distance = Speed × Time
Time = Distance ÷ Speed
Driving 150 miles in 3 hours is 150 ÷ 3 = 50 MPH. The same trip at 50 MPH takes 150 ÷ 50 = 3 hours, and 50 MPH for 3 hours covers 150 miles.
Keep your units consistent
Miles paired with miles per hour gives time in hours. The calculator lets you enter time as hours and minutes and converts internally, then shows a metric equivalent (kilometers or km/h) and your average pace in minutes per mile.
Speed vs. pace
Runners usually think in pace — minutes per mile — rather than speed. A 6 MPH run is a 10-minute-per-mile pace. The calculator shows both so you can switch between the two.
Frequently asked questions
What is the formula linking speed, distance, and time?
Speed equals distance divided by time. Rearranged, distance equals speed times time, and time equals distance divided by speed. Keep the units consistent — miles with miles per hour gives time in hours.
How do I calculate average speed?
Divide the total distance by the total time. Driving 150 miles in 3 hours is an average speed of 150 ÷ 3 = 50 miles per hour. This is the average over the whole trip, not your speed at any single moment.
How do I calculate travel time?
Divide the distance by your speed. A 200-mile drive at 50 MPH takes 200 ÷ 50 = 4 hours. The calculator also breaks the answer into hours and minutes for you.
How do I find distance from speed and time?
Multiply speed by time. Travelling at 60 MPH for 2.5 hours covers 60 × 2.5 = 150 miles. Make sure the time is in hours to match a speed given in miles per hour.
What is pace, and how is it different from speed?
Pace is time per unit distance — minutes per mile — while speed is distance per unit time. Runners often think in pace: a 10-minute-per-mile pace is the same as a speed of 6 miles per hour.
Disclaimer: Results assume constant average speed and are for educational and planning purposes.