What is the pulse rate should be after exercise

Your question is a little too general. The rate will vary depending on how intensely you worked out. Use this formula first to find your estimated Heart Rate Max = 220 - age.

Then break it down into percentages: 65%, 75%, 85%. These are considered intensity levels.

Just take the heart rate max and find that percent value. That will give you beats per minute for that intesity. Hope this gives some insight.

there are usually beats per minute that are on a chart on most exercise machines like treadmills.