If you’re researching this particular subject matter, then chances are you’re in store for a drug screening for some reason or another. Why else would anyone be concerned as to how long weed stays in your system, right? At least we can’t think of a good reason.

Nevertheless, you need to know how long marijuana stays in your urine, so we’ve scoured the internet for you regarding this very subject and here’s what we’ve come up with.

How Long Does Weed Stay In Your Urine?

That’s a good question. However, there’s no simple answer as to how long THC stays in your system because it can vary from one person to the next.


As it turns out, there are several different aspects that come into play when trying to figure out just how long marijuana stays in your urine, such as, whether you smoked it or you’ve eaten it; if you smoked it, how often and how much; your weight; your age; your waist size; and several other key elements.

But luckily for those of us that need to know, a handful of scientists have figured it out. To a degree, that is.

So this is what we know regarding how long weed stays in your urine. At least until the marijuana laws change on a federal basis and extensive research can be conducted, right?


The THC In Your Pee Timeframe

Marijuana Use: Just Once

Estimated Number Of Days Detectable In Your Urine: 1-7+ days

People that have only smoked weed one time have the best chance of passing a surprise (or scheduled) drug screening that tests your pee because urine drug tests are reported to only detect 11-nor-9-carboxy-Δ9-tetrahydrocannnabinol (THC-COOH), a non-psychoactive cannabis metabolite, which hasn’t had a chance to build up in their fat cells yet.

Marijuana Use: Regular

Estimated Number Of Days Detectable In Your Urine: 1-12+ weeks

Those of us that puff the sticky stuff on a regular basis are most at risk of failing a urine drug test. And why is that? Well, it’s because tons of the cannabis metabolite THC-COOH has had plenty of time to store in our fat cells.

It’s been reported that the marijuana metabolite THC-COOH can “linger in the body for days and weeks with no impairing effects.” And we can thank “THC-COOH’s unusually long elimination time” for the reason as to why “urine tests are more sensitive to marijuana than other commonly used drugs.”

Previous articleColorado Marijuana Legalization Has Big Impact on Economy
Next articleGirl Scout Cookies Strain Profile
Katy has a long history as a journalist for the cannabis industry. She has witnessed reform in the laws regarding cannabis that motivates her to continue fighting for the rights of all those that live in a state where it's still illegal. Katy prefers Sativa when she tokes. Some of her favorite strains are Pandora's Box and Blue Dream.