How far is DeKalb County, GA from Alpharetta, GA?
Distance by Flight
Shortest distance between DeKalb County and Alpharetta is 21.35 miles (34.36 km).
Flight distance from DeKalb County, GA to Alpharetta, GA is 21.35 miles. Estimated flight time is 00 hours 03 minutes.
Driving distance
The driving distance from DeKalb County, Georgia to Alpharetta, Georgia is: 29.27 miles (47.1 km) by car.
Driving from DeKalb County to Alpharetta will take approximately 00 hours 35 minutes.
#1 DeKalb County
County in Georgia, United States
| Population | 762009 |
|---|---|
| GPS Coordinates | 33°46'18"N 84°13'35"W |
| Latitude | 33.7715300 |
| Longitude | -84.2264100 |
| Altitude | 277 |
| Country | United States |
#2 Alpharetta
The most populous city in Fulton County, Georgia. It is located in the northern suburbs of Atlanta. Alpharetta is known for its many parks and green spaces, its many historical sites, and its many attractions, such as the Alpharetta Arts Council and the Alpharetta City Hall.
| Population | 67897 |
|---|---|
| GPS Coordinates | 34°4'31"N 84°17'39"W |
| Latitude | 34.0753800 |
| Longitude | -84.2940900 |
| Altitude | 347 |
| Country | United States |
Ending point in Alpharetta: Academy Street (-84.29408,34.075615)
Estimated Travel Time Between DeKalb County and Alpharetta
The distance between DeKalb County and Alpharetta is 47 km if you choose to drive by road. You can go 00 hours 31 minutes if you drive your car at an average speed of 90 kilometers / hour. For different choices, please review the avg. speed travel time table on the below.
There is no time difference between DeKalb County and Alpharetta. The current time is 08:59:19.
| Average Speed | Travel Time |
|---|---|
| 30 mph (48.3 km/h) | 00 hours 58 minutes |
| 40 mph (64.37 km/h) | 00 hours 43 minutes |
| 50 mph (80.47 km/h) | 00 hours 35 minutes |
| 60 mph (96.56 km/h) | 00 hours 29 minutes |
| 70 mph (112.65 km/h) | 00 hours 25 minutes |
| 75 mph (120.7 km/h) | 00 hours 23 minutes |
| 80 mph (128.75 km/h) | 00 hours 21 minutes |
Gas Consumption
A car with a fuel efficiency of 8.3 l/100 km will need 3.91 liters (1.03 gallon) of gas to cover the route between DeKalb County and Alpharetta.
The estimated cost of gas to go from DeKalb County to Alpharetta is $3.09 (diesel $4.21).
Georgia gas prices.
| Gasoline | Mid Grade | Premium | Diesel | |
|---|---|---|---|---|
| Gallon | $3 | $3.43 | $3.82 | $4.08 |
| Total | $3.09 | $3.55 | $3.95 | $4.21 |
Take a look at our Gas Cost Calculator feature. It will figure out how much it will cost to drive this particular distance.
The average gas price (in Georgia ) per gallon of daily gas for calculations is $2.995 (Diesel $4.079) /gallon. Last changed prices on December 29, 2025.
How did we calculate the distance?
The place names are translated into coordinates to approximate the distance between DeKalb County and Alpharetta (latitude and longitude). Cities, states, and countries each have their own regional center. The Haversine formula is used to measure the radius.
