Drive Time Calculator
Enter your trip distance and average driving speed to get the total drive time and estimated arrival time. Add break stops and fuel details to see the full trip cost and cost per passenger. Switch between metric and imperial units, and use reverse mode to calculate when you need to leave to hit a target arrival time.
How to calculate drive time
The core formula is straightforward: drive time equals distance divided by average speed. A 200-mile trip at 60 mph takes 200 / 60 = 3.33 hours, which is 3 hours and 20 minutes. Add your planned break time on top to get the total trip time, then add that to your departure time to find the arrival time. For example, if you leave at 08:00 and your total trip time (driving plus breaks) is 3 hours 50 minutes, you arrive at 11:50. This calculator handles all of that arithmetic and also estimates your fuel cost, so you can plan your budget alongside your schedule.
Choosing a realistic average speed
Your average speed over a whole journey is almost always lower than the posted speed limit. Highway driving at 70 mph drops toward 55-60 mph once you account for acceleration, braking, traffic signals, slower sections in towns, and congestion near cities. For planning purposes, 55-65 mph (90-105 km/h) is a solid estimate for mostly-highway U.S. interstate drives, 45-55 mph (70-90 km/h) for mixed rural and highway routes, and 25-40 mph (40-65 km/h) for urban or heavily congested roads. Using a speed that is slightly conservative builds in a natural buffer and gives a more dependable arrival estimate.
Fuel cost breakdown
Fuel cost = (distance / fuel efficiency) x fuel price per unit. In imperial units, if your vehicle gets 30 mpg and the trip is 300 miles, you burn 10 gallons. At $3.50/gal that is $35.00. Divide by the number of passengers to get the per-person share. In metric terms, the same logic applies using liters and km/L. Fuel prices fluctuate, so check a local price aggregator before a long trip for the best estimate. The calculator uses the efficiency and price you enter, so update them to match your vehicle and your local pump price.
Rest stops and driver fatigue
The U.S. Department of Transportation and most road-safety authorities recommend taking a break of at least 15-20 minutes for every 2 hours of driving. Stopping every 2 hours keeps alertness high, stretches the body, and significantly reduces fatigue-related crash risk. For a 6-hour drive, plan at least two stops. Long-haul trucking regulations (Hours of Service) require a 30-minute break after 8 hours of driving - using a similar discipline for personal road trips is good practice. This calculator lets you add total break time, which is then included in the arrival estimate so your schedule stays realistic.
Trip length guide by drive time
| Drive time | Category | Rest stop recommendation | Distance at 60 mph / 100 km/h |
|---|---|---|---|
| Under 1 h | Short | Optional | ~60 mi / ~100 km |
| 1-3 h | Medium | One stop recommended | 60-180 mi / 100-300 km |
| 3-6 h | Long | One to two stops required | 180-360 mi / 300-600 km |
| 6-10 h | Very long | Minimum 2-3 stops | 360-600 mi / 600-1000 km |
| 10+ h | Multi-day advised | Split across two or more days | 600+ mi / 1000+ km |
General planning benchmarks for road trips in typical highway conditions.
Frequently asked questions
How do I calculate driving time from distance and speed?
Divide the trip distance by your average speed. For instance, 150 miles at 60 mph = 2.5 hours = 2 hours 30 minutes. Add your break time to get the total time door to door, then add that to your departure time to find the arrival time.
What average speed should I use for highway driving?
For U.S. interstate highways, 55-65 mph (90-105 km/h) as an average is realistic when you account for speed changes, traffic, and occasional slower sections. The posted limit is usually higher, but your average over the whole trip will be lower. Using a conservative figure gives a more reliable arrival estimate.
How is fuel cost calculated?
Fuel used equals trip distance divided by fuel efficiency. Fuel cost equals fuel used multiplied by the price per gallon or liter. For a 300-mile trip in a 30-mpg vehicle at $3.50/gal: 300 / 30 = 10 gallons, and 10 x $3.50 = $35.00. Divide by the number of passengers to split the cost.
Can I calculate when to leave to arrive at a specific time?
Yes. Take your target arrival time and subtract the total trip time (driving plus breaks). For example, if the total trip is 3 hours 30 minutes and you need to arrive by 14:00, you should leave by 10:30. The "steps" panel in this calculator shows the full arithmetic so you can verify the reverse calculation.
How many rest stops should I plan for a long drive?
Road-safety guidelines recommend a break of at least 15-20 minutes every 2 hours of driving. For a 4-hour drive, plan one stop; for a 6-hour drive, plan two stops. This calculator lets you enter total break time, which is added to the driving time so your arrival estimate stays accurate.
Does the calculator work with kilometers and liters?
Yes. Switch to Metric at the top of the calculator to enter distance in kilometers, speed in km/h, fuel efficiency in km/L, and price in dollars (or your local currency) per liter. All calculations update automatically.