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 50 minutes. 1 mile will take around 25 minutes, while 0.8 miles will take around 20 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 48 minutes on average.
Calories Burned in 48 minutes
Weight 100lb:114
Weight 120lb:137
Weight 125lb:143
Weight 150lb:171
Weight 175lb:200
Weight 200lb:229
Weight 250lb:286
Weight 300lb:343
Calories Burned in 40 minutes
Weight 100lb:95
Weight 120lb:114
Weight 125lb:119
Weight 150lb:143
Weight 175lb:167
Weight 200lb:191
Weight 250lb:238
Weight 300lb:286
Calories Burned in 45 minutes
Weight 100lb:107
Weight 120lb:129
Weight 125lb:134
Weight 150lb:161
Weight 175lb:188
Weight 200lb:214
Weight 250lb:268
Weight 300lb:321
Calories Burned in 1 hour 15 mins
Weight 100lb:179
Weight 120lb:214
Weight 125lb:223
Weight 150lb:268
Weight 175lb:313
Weight 200lb:357
Weight 250lb:447
Weight 300lb:536
Calories Burned in 1 hour 15 mins
Weight 100lb:179
Weight 120lb:214
Weight 125lb:223
Weight 150lb:268
Weight 175lb:313
Weight 200lb:357
Weight 250lb:447
Weight 300lb:536
Calories Burned in 1 hour 30 mins
Weight 100lb:214
Weight 120lb:257
Weight 125lb:268
Weight 150lb:321
Weight 175lb:375
Weight 200lb:429
Weight 250lb:536
Weight 300lb:643