Solve any of the three
Find speed, distance or time. Just choose the missing value and enter the other two.
Solve for speed, distance or time in any unit
Speed Distance Time CalculatorWith Pace, Arrival Time & Unit Conversions
Use this free speed distance time calculator to find any one value from the other two. Work in km, miles, metres or nautical miles, get your pace and arrival time, and see every result converted into all common units instantly.
- km/h, mph, m/s and knots
- Hours, minutes and seconds
- Arrival time
- Journey timeline
Journey timeline and conversions
350 km at 70 km/hYour journey
Time and distance at each quarter of the trip.How your speed compares
Typical average speeds for common ways to travel.All units at a glance
Your result converted into every common unit.| Measure | Value |
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Why this tool
More Than a Basic Speed Calculator
Most calculators solve one formula in one unit. This one handles every unit, shows the working and turns the answer into something you can plan a trip with.
Mix any units
Enter distance in miles and speed in km/h if you like. The tool converts everything behind the scenes.
Arrival time
Add a departure time to see exactly when you will arrive, even for overnight journeys.
Pace for runners
Get minutes per km and per mile, which runners and walkers use to plan their training.
Journey timeline and comparison
See time and distance at each stage of the trip, and how your speed compares with common transport.
Private and instant
Everything is calculated in your browser, with no sign-up and nothing stored.
How to use
How to Use the Speed Distance Time Calculator
The answer updates as you type, so you can try different speeds or routes quickly.
Choose what to find
Pick speed, distance or time. The form hides the field you are solving for.
Enter the known values
Type the two values you know and tap the unit for each one.
Add a departure time
Optionally, enter when you set off to get your arrival time.
Read the result
See the answer, the formula used, your pace and the result in every unit.
Check the journey view
Use the timeline and speed comparison to plan stops or training. Then copy the result.
The formula
Speed, Distance and Time Formulas
Speed tells you how much distance you cover in a unit of time. Because the three values are linked, you can always find one when you know the other two.
To avoid mistakes, keep your units consistent. For example, use kilometres with hours to get km/h, or metres with seconds to get m/s.
Worked example: finding time
Suppose you drive 350 km at an average of 70 km/h. Time = 350 ÷ 70 = 5 hours. If you leave at 8:00 AM, you arrive around 1:00 PM.
Worked example: finding speed
If you run 10 km in 50 minutes, first convert 50 minutes to 0.833 hours. Then speed = 10 ÷ 0.833 = 12 km/h, which is a pace of 5 minutes per km.
The speed triangle
Speed = Distance ÷ Time
- Distance: Speed × Time
- Time: Distance ÷ Speed
- km/h to m/s: divide by 3.6
- mph to km/h: multiply by 1.609
- Pace: 60 ÷ speed in km/h gives minutes per km
| Speed | km/h | mph | m/s |
|---|---|---|---|
| Walking | 5 | 3.1 | 1.39 |
| Easy run | 10 | 6.2 | 2.78 |
| City traffic | 40 | 24.9 | 11.1 |
| Highway | 100 | 62.1 | 27.8 |
| Fast train | 250 | 155.3 | 69.4 |
Average speed
How to Calculate Average Speed Correctly
Average speed is total distance divided by total time. It is not the simple average of the speeds you travelled at.
For example, suppose you drive 60 km at 60 km/h and return at 30 km/h. The trip takes 1 hour out and 2 hours back, so the average is 120 km ÷ 3 hours = 40 km/h, not 45 km/h.
So when a route has different speeds, add up the distances and times first, then divide.
Tips
Planning Real Journeys
Real trips include traffic, stops and slower stretches. Therefore, use a realistic average speed rather than the speed limit.
For long drives, add about 15 minutes of rest for every two hours of driving. For runs, pace charts help you hold an even effort.
Safety first: plan with legal, safe speeds. Arrival times here are estimates and do not account for traffic or breaks.
Benefits
Benefits of Using This Calculator
- Plan road trips and know your arrival time.
- Check physics and maths homework in seconds.
- Set running and cycling pace targets.
- Convert between km/h, mph, m/s and knots.
- Estimate delivery and travel times for work.
- Works on phone, tablet and desktop.
FAQ
Speed Distance Time FAQs
Quick answers to common questions about speed, distance and time.
What is the formula for speed, distance and time?
Speed = distance ÷ time. You can rearrange it to distance = speed × time and time = distance ÷ speed. Always use matching units, such as km with hours or metres with seconds.
How do I calculate travel time?
Divide the distance by your average speed. For example, 350 km at 70 km/h takes 5 hours. Add a departure time in the calculator to see your arrival time too.
How do I convert km/h to m/s?
Divide km/h by 3.6. For example, 90 km/h equals 25 m/s. To go from m/s to km/h, multiply by 3.6.
How do I convert mph to km/h?
Multiply mph by about 1.609. So 60 mph is roughly 96.6 km/h. To convert km/h to mph, divide by 1.609.
How do I find average speed for a trip with different speeds?
Divide the total distance by the total time. Do not simply average the speeds, because you spend more time at slower speeds.
How do I calculate running pace?
Divide your time in minutes by the distance. For example, 10 km in 50 minutes is a pace of 5 minutes per km. The calculator shows pace per km and per mile automatically.
How far can I travel in a given time?
Multiply your speed by the time. For instance, at 60 km/h for 2 hours 30 minutes you travel 150 km. Choose Distance in the calculator to work it out.
What is a knot?
A knot is one nautical mile per hour, or about 1.852 km/h. It is used for ships and aircraft.
Plan Every Trip With Confidence
From a morning run to a long road trip, knowing your time and pace makes planning easy. Use the speed distance time calculator whenever you need a quick, accurate answer.
Calculate nowMore travel and fitness tools
Results assume a constant average speed and are for planning and study only. Real travel times depend on traffic, weather, stops and road conditions.