The British Heart Foundation says almost a third of smokers in Wales say their family wants them to give up the habit.
It's launching a campaign to show people the amount of money they could save by quitting.
As part of its No Smoking Day campaign, the BHF Cymru is encouraging smokers to 'swap fags for swag' and think about the financial incentives of quitting.
According to figures from the charity, an average person who smokes 20 cigarettes a day an save £7 a day, £49 a week, £210 a month and £2,555 a year if they quit.
Dr Mike Knapton, Associate Medical Director at the BHF, said: "These figures reveal the emotional burden smokers endure by feeling guilty about the impact their addiction has on family life and their finances. Fortunately, if you smoke and want to stop, we're here to help."
For more information on the campaign - visit the campaign website or call the free helpline on 0800 434 6677.