How do I calculate driving time?

Divide miles by average mph, then add rest, fuel or meal stops. Use a lower average speed or traffic buffer for congestion and surface roads.

Why is this different from my navigation app?

Navigation apps use a specific route and live or historical traffic. This calculator uses only your distance, speed, stops and manual buffer.

How often should I add rest stops?

For long drives, plan breaks before fatigue becomes a safety issue. The exact timing depends on the driver, passengers, weather, route and local rules.

Drive Time Calculator

Estimate driving time from distance, average speed, rest stops, traffic buffer and departure time.

Distance (mi)

Average speed (mph)

Rest stops

Minutes per stop

Traffic buffer (%)

Departure time

The traffic buffer is a manual planning estimate, not live traffic data.

Estimate Drive Time with Stops

Drive-time searches usually need a practical road-trip estimate, not just distance divided by speed. This calculator adds planned rest stops and a manual traffic buffer to estimate total time and arrival.

Enter the route distance in miles.
Use a realistic average speed for the full route, not the speed limit.
Add the number of rest, meal or fuel stops and minutes per stop.
Use the traffic buffer when you want to reduce effective speed for congestion, weather or surface roads.
Enter departure time to estimate arrival.

Not live navigation

The calculator does not know real-time traffic, road closures, construction, weather, speed limits, ferries or time zones. Check a navigation app before departure.

Drive Time Formula

E f f ec t i v e s p ee d = A v er a g e s p ee d \times (1 - \frac{B u f f er}{100})

D r i v in g t im e = \frac{D i s t an ce}{E f f ec t i v e s p ee d}

T o t a l t im e = D r i v in g t im e + S t o p s \times M in u t es p er s t o p

Choosing an Average Speed

Route type	Typical planning range
Interstate or freeway	60-70 mph when conditions are clear.
Mixed highway and towns	45-60 mph after signals, turns and slow segments.
Urban driving	20-35 mph depending on traffic and signals.
Rural two-lane roads	45-55 mph when passing, terrain or curves slow the route.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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