A brisk walk is about 3 miles an hour, which is faster than a stroll. To get any real health benefits you need to walk over 3 mph for 20 minutes or longer in one stretch. While walking slower or in short bursts has some benefit, you need to get your heart rate up (and burn more calories) for a real cardio benefit.
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A distance of 2 miles should take around 30 minutes. 1 mile will take around 14 minutes, while 0.8 miles will take around 11 minutes.
As a general rule, the faster you go, the more calories you will burn exponentially since your body uses more energy to go faster. At a moderate speed per hour you will burn less calories than walking at a faster rate, e.g. a moderate to fast pace.
Several studies have found shown high-intensity training (HIIT) significantly reduces total abdominal fat, including visceral belly fat more effectively than lower-intensity exercise like walking.
2 miles should take about 27 minutes on average.
Calories Burned in 27 minutes
Weight 100lb:150
Weight 120lb:180
Weight 125lb:188
Weight 150lb:225
Weight 175lb:263
Weight 200lb:300
Weight 250lb:375
Weight 300lb:450
Calories Burned in 40 minutes
Weight 100lb:222
Weight 120lb:267
Weight 125lb:278
Weight 150lb:333
Weight 175lb:389
Weight 200lb:445
Weight 250lb:556
Weight 300lb:667
Calories Burned in 45 minutes
Weight 100lb:250
Weight 120lb:300
Weight 125lb:313
Weight 150lb:375
Weight 175lb:438
Weight 200lb:500
Weight 250lb:625
Weight 300lb:750
Calories Burned in 1 hour 15 mins
Weight 100lb:417
Weight 120lb:500
Weight 125lb:521
Weight 150lb:625
Weight 175lb:729
Weight 200lb:833
Weight 250lb:1042
Weight 300lb:1250
Calories Burned in 1 hour 30 mins
Weight 100lb:500
Weight 120lb:600
Weight 125lb:625
Weight 150lb:750
Weight 175lb:875
Weight 200lb:1000
Weight 250lb:1250
Weight 300lb:1500
Calories Burned in 2 hours
Weight 100lb:667
Weight 120lb:800
Weight 125lb:833
Weight 150lb:1000
Weight 175lb:1167
Weight 200lb:1334
Weight 250lb:1667
Weight 300lb:2000