Its a common belief that 1 human year equals 7 dog years this isnt accurate since dogs reach adulthood within the first couple of years for accuracy the formula is 105 dog years per human year for the first 2 years then 4 dog years per human year for each year after but whichever method you use youre still an idiot and formulae are way beyond yout shirt design reads in dog years youre still an idiotour crew neck short sleeved mens t shirts are 100 premium cotton in a soft pre