Jan 052013
 January 5, 2013

Pass Your Test 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 Testing,California NORML. The information presented is only a guide or estimate since drug testing has many variables that can influence a positive or negative outcome.

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 only way to really know if you are positive is to test yourself. You can test yourself with a cheap drug test and know if you are positive. Buy a THC urine drug test

How long does THC 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 may only show positive 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 weed stay in your system
By: HomeHealthTesting.com

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About Johnny Green

Johnny Green is a marijuana activist from Oregon. He has a Bachelor's Degree in Public Policy. Follow Johnny Green on Facebook and Twitter. Also, feel free to email any concerns.
  • Jim

    Hey, I smoked a g in a four day period 10 days ago and then a smoked a J with two friends last sunday, I don’t smoke often like once a month. I’m 175lbs 6’2 athletic build, how long will it take to get out with exercise 3 times a week, massive water intake, and cranberry pills?

  • doreen

    What about second hand smoke.a couple to five times a day in a vehicle with the window rolled down?

  • Alandra

    I’m about 5’2″ and 115lbs. Smoke about 5days a week I work out everynight for about an hour. How long should it stay in my system..

  • cashuis

    If I hit a blunt 3 times 3 days ago, how long does it take for it to be out my system? I have to take a drug test tomorrow!

    • Jay

      1-6 days

    • Jay

      It might be negative depends on the diet you had and how often you smoke

  • Guy22

    I’m 5″11 160 pounds and I smoked about once a week I quit 20 days ago. I am pretty athletic looking and don’t have much fat. Would you say I’m clean for a lab test

    • Stonedwall Jackson

      Yeah you should be ok but just in case I would say drink water not too much but atleast an extra bottle or two a day

  • HELP!!! almost a year ago

    Smoked regularly (maybe twice, three times a month) in 2013, then from January to April of 2014, nothing, one hit off a bong in April, 2014, had a bad experience, I’m 5’8/240 pounds– I’m a big guy, but I haven’t touched it since because i had a panic attack that lasted almost a week. my friends said it was a ‘personal problem’ because none of them (who all smoked the same stuff) had any problems. is my hair/blood/urine clean by now? it will be one year on april 21, 2015