Speed = distance ÷ time
Choose what you want to find — speed, distance or time — and enter the other two in whichever units you have: kilometres or miles, hours or minutes, km/h, mph, m/s or knots. The calculator converts everything and gives the answer in the unit you choose.
It also shows the pace (minutes per km and per mile), the measure runners and cyclists use.
How to calculate speed, distance or time
- 1
Choose what to solve for
Speed, distance or time.
- 2
Enter the other two values
With their units.
- 3
Pick the result unit
Read speed, time and pace.
Key features
Solve any variable
Speed, distance or time.
Mixed units
km, miles, minutes, hours…
Pace
min/km and min/mile.
Instant
Updates as you type.
Common uses
- Travel: Estimate journey times.
- Running and cycling: Pace for a target time.
- Physics homework: Speed–distance–time problems.
Tips and good to know
- Average speed over a whole trip includes stops, so it's lower than your driving speed.
- Planning fuel for the journey? Try the Fuel Cost Calculator.
Frequently asked questions
What is the formula for speed?
Speed = distance ÷ time. 150 km in 2.5 hours is 60 km/h.
How do I calculate travel time?
Choose Time and enter distance and speed: time = distance ÷ speed.
How do I convert km/h to m/s?
Divide by 3.6. 72 km/h = 20 m/s.