A calorie is the amount of energy needed to raise the temperature of 1 gram of water by 1 degree. One kilocalorie equals 1,000 calories. Nutrition data as well as exercise efficiency are given in kilocalories. Metabolic Equivalent Tasks (METS) is another unit of energy used in fitness. A METS value indicates how many more calories you burn in various activities; for example, running compared with resting.
Things You'll Need
 Calculator

Multiply your weight by 11 (for men) or by 10 (for women) to calculate the basal metabolic rate (BMR). For example, a 200pound man has a BMR of 200 x 11 = 2,200 calories/day

Divide the basal metabolic rate by 24 to calculate the metabolic rate per hour. In this example, BMR per hour is 2,220 / 24 = 91.7 calories/hour.

Multiply the METS value by the metabolic rate per hour to compute how many calories are burned per hour. For instance, swimming has a METS value of 6. In our example, the metabolic rate is 91.7; 91.7 x 6 = 550.2 calories/hour.

Divide calories per hour by 60 to calculate calories per minute. In this example, 550.2 / 60 = 9.17 calories/minute.

Divide calories per minute by 1,000 to calculate kilocalories per minute. In this example, 9.17 / 1,000 = 0.00917 kilocalories per minute.
References
 Brian Mac Sport's Coach: METS
 "Fitness For Dummies"; Suzanne Schlosberg and Liz Neporent; 2010