As a fitness and health expert, I can provide you with a detailed answer to your question. The number of calories you burn while walking depends on several factors, including your weight, walking speed, and the duration of your walk.

To give you a general idea, a person weighing 150 pounds (68 kg) can burn approximately 100 calories by walking at a moderate pace of 3 miles per hour (4.8 km/h) for about 30 minutes. Therefore, to burn 500 calories, you would need to walk for approximately 150 minutes, or 2 hours and 30 minutes, at that pace.

However, this is a rough estimate and the actual calories burned can vary. To get a more accurate estimate, you could use a fitness tracker or an online calorie calculator that takes into account your specific details.

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Individuals weighing 155 pounds burn 500 calories walking 4 miles per hour for 90 minutes, or walking at a pace of 3.5 miles per hour for about 100 minutes, according to Harvard Health Publications. Boosting your walking speed up to 4.5 miles per hour means you'll expend 500 calories in just 81 minutes.read more >>