Research shows that men burn an average of 101 calories during sex, or about 4.2 calories burned per minute. Women burn an average of 69 calories during sex, or about 3.2 per minute. Of course this can vary enormously, check by weight below, so you will have you judge whether are more (or less) active than average. You can go up or down a weight range, or even 2, to adjust for this.
Calories Burned in 1 hour
Weight 100lb:133
Weight 120lb:160
Weight 125lb:167
Weight 150lb:200
Weight 175lb:233
Weight 200lb:267
Weight 250lb:333
Weight 300lb:400
Calories Burned in 40 minutes
Weight 100lb:89
Weight 120lb:107
Weight 125lb:111
Weight 150lb:133
Weight 175lb:156
Weight 200lb:178
Weight 250lb:222
Weight 300lb:267
Calories Burned in 40 minutes
Weight 100lb:89
Weight 120lb:107
Weight 125lb:111
Weight 150lb:133
Weight 175lb:156
Weight 200lb:178
Weight 250lb:222
Weight 300lb:267
Calories Burned in 45 minutes
Weight 100lb:100
Weight 120lb:120
Weight 125lb:125
Weight 150lb:150
Weight 175lb:175
Weight 200lb:200
Weight 250lb:250
Weight 300lb:300
Calories Burned in 1 hour 30 mins
Weight 100lb:200
Weight 120lb:240
Weight 125lb:250
Weight 150lb:300
Weight 175lb:350
Weight 200lb:400
Weight 250lb:500
Weight 300lb:600
Calories Burned in 2 hours
Weight 100lb:267
Weight 120lb:320
Weight 125lb:333
Weight 150lb:400
Weight 175lb:467
Weight 200lb:533
Weight 250lb:667
Weight 300lb:800