Can I Vape at 16? What is the Legal Age for Vaping in the UK? How Old Do You Have To Be To Vape? TABlites Tablites Do you have a teen who is vaping? Join this 4 week parent support group. Text "PARENT SUPPORT" to 410 610 8771 for more information and to sign up for the next Parent Education How Old Do You Have to Be to Vape? A 22 year old who started vaping at age 15 has been given just 18 months to live, with doctors saying her lungs now resemble those of an 80 year old. How old do you have to be to vape?