Automotive

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Drive Time Calculator.

Estimate how long a drive will take from distance and average speed, with city, suburban and highway presets plus time for stops.

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Set your values

Results update as you type.

Total time for fuel, food and rest breaks.

Total trip time: 1h 15m

Total trip time

1h 15m

Breakdown

Driving time1h 15m
Stops0 min
Distance (km)100.0
Distance (miles)62.1
Speed used80 km/h (50 mph)

How to Use

Time = distance / average speed. Average speed is an input, not a hidden constant, because it is what actually decides the answer.

Presets: city 48 km/h (30 mph), suburban 80 km/h (50 mph), highway 105 km/h (65 mph). These are averages over a whole leg, not speed limits.

Real trips run slower than the limit: junctions, traffic lights, roadworks and merging all eat time. If you are planning around an arrival, use a speed 10-15% below the posted limit.

Add fuel, food and rest stops in the stops field — they are added on top of the driving time.

FAQs

How long does it take to drive 100 miles?

At a highway average of 65 mph (105 km/h) it takes about 1 hour 32 minutes. At a suburban 50 mph average it is 2 hours, and in stop-start city traffic averaging 30 mph it stretches to well over 3 hours.

Why is my real drive slower than the speed limit suggests?

Average speed over a whole trip is always below the posted limit because of junctions, traffic lights, roadworks, merging, congestion and acceleration from a standstill. A good planning rule is to use a speed 10-15% under the limit for the road type you will spend most of the trip on.

What average speed should I use?

Use 48 km/h (30 mph) for city driving, 80 km/h (50 mph) for suburban and A-road driving, and 105 km/h (65 mph) for sustained motorway or interstate driving. Mixed routes fall between — set the field to whatever best matches the majority of your distance.

How much time should I add for stops?

Plan about 15 minutes for a fuel stop, 30-45 minutes for a meal, and a 15-minute rest break every two hours of driving for safety. Enter the total in the stops field and it is added to the driving time.

Does the calculator account for traffic?

Not automatically — it uses whatever average speed you enter. To model rush-hour traffic, lower the speed rather than adding stop time: congestion slows the whole leg instead of pausing it.

Cite this calculator

Canonical URL: https://mathify.one/zh/automotive/drive-time

Cite as: Mathify. (2026). 驾车时间计算器. https://mathify.one/zh/automotive/drive-time

Use Cases

Plan a road trip

Estimate how long a trip will take based on distance and typical speeds, including breaks for fuel and rest.

Example: Enter 500 km, highway preset, and 30 minutes of stops to see total travel time.

Compare driving conditions

See how travel time changes between city, suburban, and highway driving for the same distance.

Example: Compare 20 km at city vs. highway speeds to decide the best route.

Frequently Asked Questions

How does the Drive Time Calculator estimate travel time?
It divides the distance you enter by the average speed you select or enter, then adds the total minutes you specify for stops. The result is the estimated total drive time, including breaks.
What are the city, suburban, and highway presets?
These presets provide typical average speeds for different driving conditions: city (lower speed), suburban (moderate), and highway (higher). You can also enter a custom average speed in km/h.
Can I include time for fuel and rest stops?
Yes, enter the total minutes you plan to spend on fuel and rest stops in the 'Stops (minutes)' field. This time is added to your driving time to give a more realistic total.

Tips & Common Mistakes

Tips

  • Use the highway preset for long-distance trips on freeways, and city for congested urban routes.
  • Add realistic stop times for fuel, meals, and rest breaks to get a more accurate total.
  • For a more precise estimate, adjust the average speed to match your typical driving speed.
  • Remember that actual drive time can vary due to traffic, weather, and road conditions.

Common Mistakes to Avoid

  • Forgetting to add stop time, which can make the estimate too short.
  • Using a speed that is too high for the road type, like using highway speed for city driving.
  • Not converting distance units correctly if you switch between miles and kilometers.

Last updated: August 13, 2026