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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  3,680 Responses to “How Long Does Marijuana Stay in Your System? Infographic”


    Guys no one can tell you whether you will pass your test or not with 100% accuracy. Here’s a few general guidelines. If you smoked just once it will be out of your system in 3-10 days. A few times a week and you are looking at 7-21 days with 10-14 being a 75% pass rate. A heavy smoker is looking at 10-30 days. If you are very overweight, than 20-45 days.

    Standard times to pass a drug test vary from person to person. It depends on ht/wt, metabolism, how often you smoke, the quality of the buds, etc. Generally you need at least a week or two of being clean before you can pass a urine test. 3-4 weeks is recommended. The longer you go the better. Always pee a few times before testing, never use the first pee of the day. Also catch your pee mid stream. I’m a 6 ft 190 lb male that passed a Labcorp urine test 9 days after last toking. I was smoking about an eighth a week of good buds for months.

    Also I have never seen this written before but if you are a heavy smoker you probably can’t remember your dreams. For years I thought I didn’t dream but when I quit smoking I found out that I had started dreaming again. So basically when I can start remembering my dreams again I know that I should be close to passing a urine test.

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