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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  3,659 Responses to “How Long Does Marijuana Stay in Your System? Infographic”


    I smoked on 4/20 I smoked 1 blunt with my brother and smoked 1 blunt to my self. I’m 6ft 169 pounds and I took a unrine test today and I’m freaking out I walk to work everyday and I drink water on a daily basics and it was mid I even took niacin a couple of times. today makes 34 days since I smoked, will I pass


    Im 5’4 and weigh 130 pounds female. Havent smoked in 20 days and only smoked about once every 1 or 2 weeks will i pass my drug test?


    I weigh 145 and I’ve been smoking for about 5 months straight pretty much. 4/20 I smoked half an ounce with like 5 people. How long do y’all think it will take for me to pass all of the THC out of my system? I get drug tested on July 5 and I smoked May 25. I plan on drinking a ton of water and today I drank a QCarbo20 To try to help flush it out. Really need some reassurance from experienced people. Thank you


      I’m 5’3 130lbs and I smoked once last week and I’m trying to get this job and I was wondering how long will the weed stay in my system


    I was an occasional pot smoker through high school and college I became a regular user after college and soon became a heavy user for many years thereafter. I’m now 54 years old. In good health, 6’1 190 lbs. and have quit smoking altogether weeks ago. It’s day 35 without smoking pot and I’m still testing positive with a home kit. Wondering how long this is going to take me to get clean.


    I started smoking weed in January 2016 and have been hitting it heavy almost every day until May 3rd. I had a drug test just 24 days after on the 27th of May for a job I was applying for. I for sure thought I was not going to pass (being that I am 5’8 250+lbs and not in the 30 day range). However, I just got notified that I freaking PASSED. I did not drink shit tons of water hours before (not really a water drinker at all for that matter), I don’t have a high metabolism, nor did I do anything to try and manipulate the test in any way. Don’t take this as a “phew, I’m good” but a note as to everyone’s bodies react differently. Don’t get too worked up about it, but also don’t be too cocky about it either.


    If I take one hit from a bowl and I haven’t smoked in years I’m 6’1 and and 165lbs how long will it stay in my system


    Hey I haven’t smoked pot in 7 years I just smoked yesterday with a couple of my friends for the first time I take regular piss tests but from what I heard they test for the enzyme that breaks Down the TCH not for the actual thc itself will I be fine if u have a piss test next month at the beginning would I be fine to smoke for 2 days or would I guarantee pass just smoking one also do u know of any good detox kits that guarantee to remove all impurities and if so has anyone tried using it after smoking for a couple of weeks then taking the detox the. Passing a drunk text that was taken to a lab thanks


    I was smoking about a gram a day for 3 months, I stopped the first of June. I have a hair follicle August first. I am 6’3″ 210 pounds. I have been taking biotin ( hair growth) daily, sweat a ton at work, drink plenty of water, and have shaved my head 3 times since June 1. As well as my legs and armpits. My arm hair is too short. I have been letting my hair grow out as of Monday. So I will have 2 weeks growth on my head and 1 month on my legs and armpits. I do not want to chance it


    I was a heavy smoker and last year I went 30 days without smoking and had to take a drug test on the 39th day and passed. I wasn’t testing myself just drinking water everyday…now I have to take a drug test again and I last smoked June 28th prior to that I was smoking heavy everyday for 3months straight cause I’m out on medical leave. Ten days after I smoked I took a home drug test and came out positive. O 5 days after that took another home test and still positive. On the 16th day i took another test and it showed negative. I wasnt to sure about that negative so i was still freaking out.Today makes day 17 and woke up early to catch my morning urine to see what it said. Unfortunately my menstrual cycle came down so when I took the test it showed up positive and the dip strip got all funny looking so I’m not sure if I over did it with so much heavy blood in my urine. Sounds disgusting but hey I’m just sharing. I thought maybe with me being on my cycle that it would interfere and cheat the test and show a negative but that didn’t happen. Guess Im going to have to wait another 5-10 days before I test myself again. I want to be negative by the 29th which makes 30 days. Ughh the worry. Maybe I can be lucky and show up negative on the 24th day like that person who posted already. Let’s pray and im going to continue drinking my water few times a day. Hopefully I Can comment again in 10 dayand give an update.


    The last time i had a spliff was abot 40 fays ago..i took a urine test and failed it..i even been going and been drinking plenty of water..it will show in your dystem up till 3months


    I am 175 pounds 5,6. I smoked once 5 days ago. 2 bong hits and a dab. Will i pass my urine test ?

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