How Long Will One Smoke Session Stay in Your System?

Most people are occasional weed smokers, while some are regular smokers. Whichever category you belong to, knowing how long will one smoke session stay in your system becomes crucial when preparing for a drug test.

Cannabis, marijuana or as most people call it, weed, decomposes into different metabolites when someone smokes or ingests it. One of the primary metabolites that enter the body from smoking cannabis is tetrahydrocannabinol (THC), which produces a “high” effect on smokers. Interestingly, after smoking marijuana, THC and other metabolites can remain in your system for long, even after the effects wear off.

If you are wondering how long does weed stay in your system, then this article is for you. Here, we’ll explore how long THC and its byproducts last in your body after smoking. We’ll also show you how to get rid of THC from your system to pass a drug test. Let’s proceed.

How Long Does Weed Stay in Your System?

Cannabis users going for a drug test often ask: how long does weed stay in your system? How long weed stays in your system depends on many factors, including the frequency of use, the amount of weed you smoke per time, and your body fat.

For regular cannabis users, passing a drug test could be hard since there will be higher THC levels in their system. On the other hand, only lower levels of THC will be detected in occasional smokers. Also, the detection time depends on the type of drug test, whether urine, saliva, hair, blood, or sweat.

Notably, THC is detectable in your hair for several days and weeks, while saliva has the shortest detection window. The table below shows the detection window for different marijuana drug tests.

Drug Test Sample

THC Detection Window


Can be detected for up to 90 days


It is detectable for approximately 3-24 hours and up to 7 days for heavy/frequent users.


Detectable for up to 24 hours after use. Some highly precise saliva tests can detect weed for up to 72 hours after use


Detectable for 3 to 4 days


Detectable for 3-30 days after use based on frequency of use.

Riding your body off toxins to pass a drug test may seem like a daunting task. If you are not a regular smoker, you ask questions like: If I smoke once, will it show? Often time you wonder: How long does weed stay in your system after a couple of puffs? Your concern is not out of place, given how THC binds to fat molecules in the body.

But not to worry. Getting rid of THC from your body is easier and faster with specialized detox products such as Toxin Rid or Detoxify Mega Clean. You can also apply home remedies and some do-it-yourself methods to remove marijuana from your system.

How Long Will One Smoke Session Stay in Your System?

The effects of one session of smoking may wear off after one to three hours, but how long weed stays in your system depends on many factors. Some notable determinants include individual metabolic rate, genetics, body mass index, and so on.

Here are some factors that can influence your body’s ability to eliminate THC.

  • Individual metabolic rate

How fast your body’s metabolism is can affect your THC levels. Some individuals are born with a slow metabolism, while others have a fast body metabolic rate. Underlying illnesses like renal (kidney) or liver disorders may also affect drug metabolism and clearance.

For slow metabolizers, THC may take a longer time to clear from the body. But for fast metabolizers, their genetic makeup allows their body to break down drugs faster than others. This means such a person can get rid of THC faster from their system than others.

  • Body mass index (BMI) and Its Impact on drug elimination

Body mass index is an estimate of a person’s total body fat. Studies have shown that fat people retain drugs for longer than lean people. THC is fat-soluble, meaning it can bind with fat molecules when it enters the body.

Those THC molecules can passively diffuse back into the blood from the fat tissues, thus increasing the elimination half-life. So, marijuana stays longer in the system of people with more body fat.

  • Hydration levels and their role in THC elimination

Hydration plays an important role in drug metabolism. Drinking lots of water may help the kidney to flush THC metabolites out of the body through urine and sweat. However, if you are dehydrated, your body may retain more THC.

  • Physical activity and its impact on THC metabolic rate

THC elimination may be faster in physically active cannabis users. Exercise helps burn fat and can also increases thyroid function, which boosts metabolism. Your level of physical activity can indirectly affect the rate at which your body’s THC clearance.

Exercising may not significantly change your THC metabolic rate. However, exercising right before taking a drug test might increase your likelihood of testing positive for THC. Research shows that exercise may trigger your fat cells to release THC into the blood.

  • THC concentration for one smoking session

The concentration of THC you ingest in one smoking session will determine how long weed stays in your system. If the THC concentration is high, then it may take a longer time to metabolize and eliminate it from your system. The concentration of THC in one smoke depends on the marijuana strain. There are different species of marijuana plants, each with varying THC levels.

Will One Puff of Weed Be Detected in Pee Test?

For a negative result in a drug test, your body has to eliminate THC from your system. In case you’re wondering: If I smoke once, will it show up in the urine test? Yes, the likelihood is high.

No matter how small your weed intake, it’s possible to still test positive in a drug test. But as we mentioned earlier, this could depend on various factors, including frequency of use, dose and potency of weed, body metabolism and so on.

An individual metabolic rate determines drug elimination time. If your body’s metabolism is fast and efficient, THC will be eliminated from your system faster.

Again, the dose of marijuana you smoke in one session and the overall potency or concentration of THC in the weed also determines clearance time. Higher dose increases the time taken to digest and eliminate THC and its byproducts from your system. Also, more potent cannabis, with higher THC concentration, may stay longer in your system.

The detection window of various drug tests depends on how often a person smokes cannabis. If you smoke more often, the chances of detecting weed in your pee are high, even many days after the last use.

The table below shows the urine test detection window for different users.


Frequency of Use

Detection Window

Heavy users

1-30 days after use

Chronic users

1-15 days after exposure

Infrequent users

3-5 days after exposure

What’s the Urine Testing Cutoff?

Your urine test will be positive if the THC level in the sample is over 50ng/ml for marijuana testing. If your urine test is negative after one puff of marijuana, it means your THC level is lower than 50ng/ml.

Occasional users will likely test positive for THC beyond 3-4 days after the last use under the 50ng/ml cutoff level. Further, a chronic user will likely test negative far beyond 7 days from last use.

However, with a more sensitive cutoff of 20ng/ml, though less common, the urine test detection window is up to 7 days after exposure for occasional users and 21 days for frequent users. In cases of prolonged or chronic cannabis use, the detection window may be over 30 days after exposure using the 20ng/ml cutoff.

Frequency of use

The detection window for 50ng/ml cutoff

Occasional user

3-4 days after exposure

Heavy user

Up to 7 days after use

Chronic User

Up to 21 days  after withdrawal

Will One Smoke Session Be Detected in the Other Drug Test Types?

Besides frequency of use, dose, and body type, cannabis detection time depends on the type of test.

Hair Test

Among all drug test types, hair testing is the most sensitive. It can detect THC in the body for up to 90 days after withdrawal.

However, hair tests may sometimes show false positive results due to the oil transferred from the skin to the hair. Someone can test positive for THC using hair testing just by coming in contact with a cannabis user. That also means you can test positive in a hair drug test after one smoke session since the hair follicle retains THC for a long.  

Saliva Test

Saliva drug testing can detect weed for up to 24 hours after last use. However, some sensitive saliva tests can detect THC for up to 72 hours after the last intake. Therefore, one session of weed smoking can make you pass a saliva drug test.

Blood Test

On the other hand, blood tests have the shortest detection window. THC cannot be detected in a blood sample beyond 3 to 4 hours after a smoking session. The reason is the high bioavailability of enzymes in the blood that break down THC and actively send it to other parts of the body. This means if you go for a blood drug test within 3 to 4 hours after smoking, you will likely test positive.

Sweat Test

Sweat tests can detect marijuana for 1-4 days after the last intake. A person’s hydration level can affect the THC detection time. Sweat gets more concentrated when a person is dehydrated and will contain a higher level of THC. That means if you are dehydrated, your body will retain THC for longer. This means you will likely test positive if you are dehydrated and run a drug test within 1 and 4 days after smoking weed.

How Long Does It Take to Get One Hit of Weed Out of Your System?

Whether you are a regular or occasional smoker, you may want to know this: How long does it take for one hit of weed to leave your system? THC detox time depends on the approaches used and how much THC in one hit of weed. However, whatever approach you employ to remove weed from your system boils down to increasing your metabolic rate or reducing the THC concentration.

Here are three helpful strategies to get rid of cannabis faster from your body:

  • Withdrawal/abstinence

If you are going for a drug test, it would help to withdraw or abstain from weed smoking for a few days before your test. This will give your body ample time to clear the amount of THC in your system and help you pass the test.

However, the period of abstinence required to clean your body of THC completely depends on your frequency of use. A user might ask: If I haven’t smoked in 2 weeks, am I clean? You may be clean of THC if your body’s metabolism is at optimum capacity or if the initial concentration of THC before withdrawal wasn’t too high.

  • Proper hydration.

Drinking plenty of water can make you urinate more frequently, allowing your kidneys to flush out excess THC faster from your system. A good hydration habit may neutralize the concentration of THC in your body, thus making you test negative in a drug test.

  • Exercise

Exercise, though not very reliable, can help speed up metabolism so that your body can break down THC faster. But remember that doing this too near to the test day may increase your chances of testing positive.

While these approaches seem unreliable, your chances of success will be higher if you combine them with detoxification remedies. Detoxification remedies are sure ways to help you flush weed from your system faster before your drug test.

Besides enhancing your body’s detoxification process, some remedies to pass a drug test work by masking THC to prevent detection.

Detox Remedies to Pass a Drug Test

Here are a few detox remedies you can rely on for passing a drug test.

  1. Toxin Rid Pills

Toxin Rid is a highly potent detox remedy that offers detox programs running for 1 to 10 days to help you pass a drug test. With Toxin Rid pills, you don’t have to ask questions like: If I smoke twice a week, how long till I’m clean? It contains natural ingredients that speed up toxin removal from the blood through the kidneys and liver.

  1. Detoxify Mega Clean

Mega Clean is a herbal ready-to-drink detox formula. It is formulated with natural ingredients to help you achieve negative drug test results 48 hours after smoke withdrawal. It supports complete body cleansing by invigorating your circulatory, urinary, and digestive systems to digest and eliminate THC and other toxins.

  1. Human Powdered Urine

In case you need a backup plan for an impromptu drug test, getting a human powdered urine (fake urine) might help. The best synthetic urine kits are made from human urine and mimic real urine to help you cheat your way out of a drug test.

  1. Natural detoxification through healthy habits

Practicing healthy habits can boost your body’s natural detoxification and help you stay clean from THC and its metabolites. The habits include regular exercise, proper hydration (drinking lots of water), sleeping more, and eating antioxidant-rich foods.

If I Smoke Once a Week How Long till I’m Clean?

Detox approaches may differ depending on your frequency of use. For instance, regular or chronic smokers would require more rigorous and long approaches to get THC out of their systems. With a few days of abstinence, drinking plenty of water, and a day Toxin Rid program, you are good to go.

Conversely, regular and chronic smokers would have to abstain for longer, two weeks or more, with a potent detox remedy to achieve undetectable THC levels.

Frequently Asked Questions

How long will one hit of a dab pen stay in your body?

One hit of THC from a dab pen may stay in your system for up to 3 days if you are a heavy smoker. But if you are a light smoker with a fast metabolism, one hit of a dab may leave your body in as short as 24 hours.

How long does one hit from a cart stay in your system?

How long one hit from a cart lasts in your system depends on your frequency of use and body mass index. However, one hit of THC from a cart can remain detectable for 3 to 7 days for regular users.

How long does a cart stay in your system?

How long a THC cart will be detectable in your system depends on the dose you consume, your body fat, etc. But generally, a cart will remain detectable for 2-30 days in most users’ systems.

How long do 4 hits of weed stay in your body?

It will take approximately 7 to 13 days to get THC out of your system if you are not a regular smoker and only smoked 4 hits of weed.

If I smoke twice a week, how long till I’m clean?

If you smoke twice a week, the tendency to test positive for THC depends on the amount of weed you smoke and your body fat. THC may remain in your body after the second smoking session for up to 7 days

Bottom Line

Even though the high effect of weed smoking is short-lived, THC and other cannabis metabolites can remain in your system for several days. However, this depends on several factors, including the user’s body fat and metabolism, potency of the weed, frequency of use and so on.

While knowing how long does weed stay in your system may seem trivial, it often poses a concern when undergoing drug testing for one reason or another. Getting acquainted with weed detection timeframes will help you apply the right detox approach to pass your drug test.

Although we have highlighted several recommendations in this article, it would be best to seek professional advice to know what detox approaches best suit you.

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