These are some of the best exercises to do for burning calories in 30 minutes. 

Swimming

Burns energy while improving muscle strength, blood flow. Calories burned in 30 minutes is 200-220

Cycling

This exercise can burn a significant number of calories in 30 minutes around  240 to 355.5.

Running

It improves flexibility, and increases endurance. It burns 300-400 calories in 30 minutes. 

Walking

The simplest way to burn calories at home. It burns 100-200 calories per 30 minutes. 

Aerobics

Dancing is cardio exercise and a fun activity. Burns around 200- 300 calories per 30 minutes.

Skipping 

It increases your heart rate, increases agility and burns around 400 calories per 30 minutes.