Lily Torah, 10, had her red curls cut short to support The Little Princess Trust, which provides wigs to children and young people.
The Portsmouth Grammar School pupil took on the selfless task to raise £100, as well as have a wig made out of her hair.
However, friends, family and teachers got behind the kindhearted youngster to donate more than £1,500 towards her charitable efforts.
Woman, 44, whose large Dobermann dog mauled girl, 3, on Leigh Park street released back into neighbourhood by police
WATCH: This is the moment a man with a grudge fire-bombed a family's garden in Leigh Park
Four people hospitalised after 'serious' multi-vehicle crash involving lorry on A27 near Chichester
Council refuses to close Gosport splash park despite it leaking 'thousands of litres of water'
Community in horror after little girl suffers ‘life changing injuries’ after being attacked by Dobermann dog in Leigh Park
Lily, from Cowplain, said: ‘I wanted to donate my hair to this charity because it had grown so long and I knew my red curls would probably be quite rare. I wanted to make someone feel happy again and I hope my donation will help just a little.
‘I am so surprised by how much I have raised! We only expected to raise £100, so to raise £1,485 in just a few days is amazing.
‘Thank you to my family, friends, hairdresser, teachers and my dad's colleagues at University of Southampton for helping raise so much money.’
Kind comments flew in with the donations, commending Lily on her brave fundraising effort, and her parents are very proud.
Mum Bryony Hart, an English teacher at Portsmouth Grammar School, said: ‘Lily was quick to offer her hair to The Little Princess Trust because she knows how harrowing losing one's hair can be after her aunty underwent chemotherapy during her fight against breast cancer.
‘We have been really delighted by her utter selflessness and determination to do something for someone who she'll never meet. Being able to think beyond one's one needs and wants is quite a big challenge at the moment, and her efforts have been a reminder of the power of community and kindness.’
Dad Russel Torah, a researcher at University of Southampton, added: ‘We are incredibly proud of her, she was very nervous the night before as I think it hit her just what it meant to have all her hair cut off but she understood how much joy her hair would give to someone else it was a small price to pay and the support of so many family, friends and colleagues was inspirational.’
Visit justgiving.com/fundraising/bryony-hart5 to donate.