61.7kg in pounds is 136.03, and in stones is 9.72

1 pound = 453.59237 grams or 1kg = 2.20462262185 lbs. You can either convert 61.7 kg to grams by multiplying by 1000 and then divide by 453.59237 to convert to lbs or multiply 61.7 by 2.20462262185 to convert to lbs. 1 stone = 14 lbs so divide answer by 14 to convert to stones. Remainder is in pounds.