You’re gesturing in the right direction, but if it’s the age of the universe you’re looking for, you really want something like uranium-lead dating instead, which is routinely used to date rocks up to 4.5 billion years old with precision in the ~1% range. Carbon dating can’t reliably measure dates more than ~50,000 years ago except in special circumstances, since the half-life of 14C is 5,730 years.
You’re gesturing in the right direction, but if it’s the age of the universe you’re looking for, you really want something like uranium-lead dating instead, which is routinely used to date rocks up to 4.5 billion years old with precision in the ~1% range. Carbon dating can’t reliably measure dates more than ~50,000 years ago except in special circumstances, since the half-life of 14C is 5,730 years.