Khan wore the shorts, featuring a waistband made from 24-carat gold thread, in a unanimous points victory over American Devon Alexander in Las Vegas which helped him retain the WBC silver welterweight title at the weekend.
“It was just very sad to see innocent kids being killed,” the Briton told BBC radio on Thursday. “I can only imagine what the parents are going through.
“I want to donate the shorts for the Peshawar cause, rebuild a school and strengthen security around the area.
“We are very lucky in England. We have good security and I will be able to send my little girl to school and know she will be fine but in Pakistan you cannot do that,” said Khan.
“They send the kids outside the house and do not know if they are going to come back.