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How Long Does Marijuana Stay in Your System? [Infographic]


“How Long Does Marijuana Stay in your System?” is the most frequently asked question that we receive at HomeHealthTesting.com. While there is no definitive answer, we have presented some guidelines.

The data used to create this infographic is gathered from research on drug testing methods and the information presented by drug screen manufacturers. Some resources include Redwood ToxicologyCannabis Drug TestingCalifornia NORML. The information presented is only a guide or estimate since drug testing has many variables that can influence a positive or negative outcome. The only way to really know if you are positive is to test yourself. You can test yourself with a cheap drug test. Buy a THC urine drug test.

How long does Marijuana stay in your system?

The most common drug tests used are urine, saliva and hair. Each test has a different detection time which is important to know. The urine drug test is the most commonly used because it is cheap and has a longer detection time than a saliva test. There are several very important factors that can influence how long THC will be present in your urine:

  • Weight
  • Body Fat
  • Amount Used
  • Frequency of Use

Since these factors will vary greatly for each individual, there are no definitive guidelines to tell you how long you can test positive for THC.

On a Urine Drug Test, THC will appear as a positive within 2-5 hours of use. How long it will still show on a urine drug test is estimated based on frequency of use, but does not take into account the weight and body fat of the marijuana user:

  • One Time User may show positive for 1-6 days
  • Moderate User may show positive for 7-13 days
  • Frequent User may show positive for 15 or more days
  • Heavy User may show positive for 30 or more days
  • Some Heavy Pot Smokers have reported being positive 45-90 days after quitting

On a Saliva Drug Test, THC will test positive within one hour of use, but you may have marijuana in your system for about 12 hours after last use.

On a Hair Drug Test, THC will show up about 7 days after use and most hair drug tests will test for a 90 day period. However, THC does not always bind to the hair follicle which makes it not always considered an accurate testing method for marijuana use.

The most reliable way to know if you are testing positive for marijuana use is to drug test yourself.

How long does marijuana stay in your system?
By: HomeHealthTesting.com


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  1. Im 5’2″ about 140. Id quit for two weeks then smoked again four days ago. Whats the best way to make sure i clean myself out? No drug test scheduled yet but i give myself about 3 days to a week before its required.

  2. Please help,I have smoked for 20years on daily basis, sometimes 4a day,I weight 100lbs and I’m on pain meds because medical marijuana is not legal in Indiana, so my meds need to be in my system, so how many days will it take for me?

  3. Here my question I have smoked say 5 or 6 months I decided to smoke the 16 of Sept and stop the 21 but it wasn’t heavy heavy smoke but will I be clean this 21 coming up

  4. I smoked about everyday for about 2 years multiple times a day. I’m 6ft, 135lbs and sweat all the time from work

  5. I’m 5’4 and weigh 113, haven’t smoked in 2 weeks, and I smoke loud, will it still show.

  6. I’m looking to join the Marines however I smoked heavily on June 29-july1 and smoked at least once every day for about 2 weeks, what are my chances of passing a piss test? It’s been a month since I last smoked and I am taking the asvab this thursday

  7. I smoke occasionally am 4″11 n wieght 146 pds I jus took a hair particular test I’ve been drinking certo and niacin and drinking water and cran berry juice I know I won’t pass but we’ll it show a high percentage of thc

  8. I smoke occasionally am 4″11 n wieght 146 pds I jus took a hair particular test I’ve been drinking certo and niacin and drinking water and cran berry juice I know I won’t pass but we’ll it show a high percentage of thc

  9. I was a night time smoker only. Smoked one blunt between me & my husband. I drink nothing but water. I weigh 130 & am 5′ tall. I haven’t smoked in 2 weeks. Will k be able to pass a drug test?

  10. i am 5,7 180 pounds and only smoked every other 2 days for 2 weeks maybe i have not smoked since the 5th of this month i don’t really know when my drug test is coming up but i need to know if i would be OK on passing please help

  11. I’m 5’5” weigh about 117 and female. I took two small hits of a bowl about 30 days ago, just puffed didn’t inhale, and I took one little hit of a bowl 13 days ago, just puffed and didn’t inhale. And I had to take a random urine test for work yesterday. What are my chances of passing?

  12. I smoked for six days haven’t smoked for for for 8 days will I pass my saliva test …

  13. I’m a 5’2″ 115 lb female, I smoke maybe once a week but sometimes I’ll go 2-4 weeks without smokin . How long would it take to clear from my system?

  14. sahil kalotra on

    i smoke like 4 to 5 joints a day on the regular basis and now i just wanted to know that how much time it’ll take to get cleared from my body???????

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