Speed, Distance & Time
Speed Distance Time Calculator
Solve for speed, distance or time in one place, with a unit for every mode of transport.
speed = distance ÷ time
Also called sdt calculator · distance speed time
Auto & Travel · 9 calculators
Speed, Distance & Time Calculators
Solve speed, distance or time, average speed, pace, relative speed and when two moving objects meet or catch up.
Speed, Distance & Time
Speed Calculator
Speed from distance and time — solve for speed, distance or time in any consistent units.
speed = distance ÷ time
Also called speed formula · how fast
Speed, Distance & Time
Distance Calculator
Distance travelled from speed and time (d = v × t), in any consistent units.
d = v × t
Also called distance formula speed time · how far travelled
Speed, Distance & Time
Travel Time Calculator
Journey time from distance and average speed, including stops — with the arrival time.
Time = distance ÷ speed + breaks
Also called time calculator distance speed · how long will it take to drive
Speed, Distance & Time
Average Speed Calculator
Average speed across several legs of a journey — correctly weighted by distance, not a simple average.
Average speed = total distance ÷ total ti…
Also called mean speed · overall average speed
Speed, Distance & Time
Pace Calculator
Convert between pace (min per km or mile) and speed, for running, walking or cycling.
Pace (s per unit) = 3600 ÷ speed
Also called pace to speed · speed to pace
Speed, Distance & Time
Relative Speed Calculator
Relative speed of two objects moving towards each other or in the same direction, and closing time.
Towards: v₁ + v₂
Also called closing speed · relative velocity
Speed, Distance & Time
Meeting Time Calculator
When and where two objects travelling towards each other will meet, from their speeds and the distance apart.
Time = distance apart ÷ (v₁ + v₂)
Also called when will they meet · two trains problem
Speed, Distance & Time
Catch-Up Time Calculator
How long a faster object takes to catch a slower one that started earlier or ahead.
Time = gap ÷ (fast speed − slow speed)
Also called overtaking calculator · how long to catch up
Key speed, distance & time formulas
| Speed Distance Time | speed = distance ÷ time · distance = speed × time · time = distance ÷ speed |
|---|---|
| Speed | speed = distance ÷ time |
| Distance | d = v × t |
| Travel Time | Time = distance ÷ speed + breaks |
| Average Speed | Average speed = total distance ÷ total time |
| Pace | Pace (s per unit) = 3600 ÷ speed |
| Relative Speed | Towards: v₁ + v₂ · Same direction: |v₁ − v₂| |
| Meeting Time | Time = distance apart ÷ (v₁ + v₂) |
| Catch-Up Time | Time = gap ÷ (fast speed − slow speed) |
Speed, Distance & Time questions
Do the units have to match?
Yes — if distance is in km and time in hours you get km/h. Use the speed converter to switch to mph or m/s.