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Free Cannabis Dosage Guide

THC Dosage Calculator — How Much THC Should You Take?

Not sure how much THC to take? Use our free THC dosage calculator to find your ideal dose for flower, edibles, concentrates, or tinctures. Whether you need an edible dosage calculator or a guide for smoking, this tool adjusts for your tolerance, body weight, and desired effect.

  • 4 product types — flower, edibles, concentrates & tinctures
  • Adjusts for tolerance level & body weight
  • Practical output — grams, puffs, drops, or mg
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Cannabis Dosage Calculator

Get a personalized dosage recommendation based on your product, tolerance, and desired effect.

Universal THC dosage scale

1–2.5 mg

Microdose

2.5–5 mg

Low

5–15 mg

Moderate

15–30 mg

Strong

30 mg+

Very Strong

These ranges apply to all product types. Beginners should start low and go slow — stay in the green zone. Most regular consumers find their comfort level between 5–15 mg. Not medical advice — individual responses vary.

How It Works

How our THC dosage calculator determines your ideal dose

This calculator uses published dosage guidelines from cannabis researchers including MacCallum & Russo (2018) to produce a personalised starting dose. It factors in your chosen product type, THC percentage, tolerance level, body weight, and desired intensity — then converts the result into practical units you can actually measure.

For flower, the output is puffs and grams. For edibles, milligrams. For concentrates, visual size comparisons. For tinctures, drops and millilitres. The goal is to make how much weed to smoke — or eat, dab, or drop — as straightforward as possible.

The recommended THC dose for beginners always errs on the low side. You can always increase your dose on your next session, but you cannot undo a dose that is too high. This “start low, go slow” principle is the foundation of responsible cannabis use.

4

Product types supported

5+

Personalisation factors

Free

No sign-up required

Research

Based on published guidelines

Getting the Right Dose

Why cannabis dosage matters more than you think

Cannabis affects everyone differently. The same 10 mg edible that relaxes one person can cause anxiety in another. Getting your THC dosage right is the difference between a great experience and a bad one — and finding the right THC dose for beginners is especially critical.

Unlike alcohol, where a “standard drink” is well understood, marijuana dosage varies wildly across products. A gram of 15% flower delivers 150 mg of total THC, but the bioavailability of smoking is only 20–30%. Meanwhile, edibles undergo first-pass metabolism in the liver, converting THC to the more potent 11-hydroxy-THC — producing a stronger and longer-lasting effect at the same milligram dose.

This is why a cannabis dosage guide needs to account for product type, THC percentage, consumption method, and individual tolerance — not just milligrams alone.

Sources: Huestis (2007) — Chemistry & Biodiversity; MacCallum & Russo (2018) — European Journal of Internal Medicine

THC Dosage Chart

How much THC should you take? A guide by product type.

Every cannabis product delivers THC differently. Here’s a weed dosage chart before individual factors are applied.

Flower smoking / vaping

Inhaled cannabis takes effect within 1–5 minutes and lasts 1–3 hours. You absorb roughly 20–30% of the total THC content per puff, making it easy to dose gradually. For joint dosage specifically, a typical 0.3–0.5 g joint at 20% THC contains 60–100 mg total, but only 12–30 mg is absorbed.

Beginner1–2 puffs (3.5 mg)
Moderate tolerance3–5 puffs (7–12 mg)
High toleranceFull session (15–30 mg)

Based on 20% THC flower.

Edibles gummies, baked goods, drinks

Edibles are processed through the liver, producing 11-hydroxy-THC — a more potent metabolite. Onset takes 30 min–2 hours and effects last 4–8 hours. THC edible dosage is the #1 cause of uncomfortable cannabis experiences. Use our edibles potency calculator to dial in homemade recipes.

Beginner2.5 mg THC
Moderate tolerance5–10 mg THC
High tolerance15–30 mg THC

Never redose within 2 hours.

Concentrates dabs, shatter, wax

Concentrates contain 60–90% THC — several times stronger than flower. Even a rice-grain-sized dab delivers 15–25 mg of THC. Not recommended for beginners.

BeginnerRice grain (2.5 mg)
Moderate toleranceSmall pea (5–10 mg)
High toleranceFull dab (15–30 mg)

Effects are immediate and intense.

Tinctures & Oils sublingual drops

Held under the tongue, tinctures absorb through sublingual blood vessels in 15–45 minutes — faster than edibles, slower than smoking. Typical potency is 10 mg THC per ml. Hold under tongue for 60 seconds before swallowing. See our time to peak calculator for precise onset timing.

Beginner5 drops / 0.25 ml (2.5 mg)
Moderate tolerance10 drops / 0.5 ml (5 mg)
High tolerance20 drops / 1 ml (10 mg+)

Best absorption with sublingual hold.

Key Variables

What affects your ideal cannabis dosage

Two people can take the same dose and have completely different experiences. Here are the main factors that determine how much weed you should take.

Tolerance Level #1 Factor

Regular cannabis use builds tolerance rapidly. A daily user may need 2–3x the dose of an occasional user. Tolerance resets after 2–4 weeks of abstinence.

THC Percentage #2 Factor

A gram of 30% THC flower contains twice as much THC as 15% flower. Always check the label — product potency is the most variable factor in any marijuana dosage calculation.

Consumption Method

How much weed to smoke vs. eat are fundamentally different questions. Smoking delivers THC to the brain in seconds with lower bioavailability. Edibles take 30 min–2 hours but produce a stronger, longer effect. The same mg dose hits very differently depending on method.

Body Weight & Metabolism

Heavier individuals generally need slightly higher doses. Faster metabolisms process THC more quickly, shortening duration but not necessarily reducing intensity.

Set & Setting

Your environment and mood significantly influence how cannabis affects you. The same dose can feel relaxing at home and anxiety-inducing in an unfamiliar setting.

Food & Stomach

Empty stomach intensifies effects and speeds onset. For edibles, a small meal with healthy fats 30 minutes before improves absorption and produces a smoother experience.

Beginner’s Guide

THC dosage for beginners — the “start low, go slow” method

If you’re new to cannabis or returning after a long break, getting the dosage right is the single most important factor in having a positive experience.

1

Start at half the suggested dose

2.5 mg for edibles, 1–2 puffs for flower. You can always take more.

2

Wait before redosing

15 min for flower/vape, 30–60 min for tinctures, full 2 hours for edibles.

3

Increase gradually

Add 1–2.5 mg (edibles) or one puff (flower) until you find your level.

4

Have CBD on hand

CBD can counteract THC’s intensity. If you feel too high, CBD oil takes the edge off.

If you take too much

Cannabis cannot cause a fatal overdose. If you overconsume, the discomfort is temporary and will pass within a few hours. Here’s what to do:

  • ✓ Find a calm, comfortable space
  • ✓ Drink water and eat a light snack
  • ✓ Focus on slow, deep breathing
  • ✓ Chew on black peppercorns — a common remedy backed by terpene science
  • ✓ Take CBD if available — it counteracts THC
  • ✓ Remember: it will pass. Typically 2–4 hours for inhaled, 4–6 for edibles
People Also Ask

Frequently asked questions about cannabis dosage

How many mg of THC should a beginner take?
Most cannabis experts recommend starting with 2.5 mg of THC for your first time. This is considered a low dose that typically produces mild relaxation without significant impairment. If you feel nothing after 2 hours (for edibles) or 15 minutes (for flower), you can try 5 mg on your next session.
Is 10mg of THC a lot?
For a beginner, 10 mg is a strong dose that can produce significant psychoactive effects. For a regular user, 10 mg is moderate and comfortable. In Canada, 10 mg is the standard single serving for commercial edibles — designed for experienced consumers, not first-timers.
How long do edibles take to kick in?
Most edibles take 30 minutes to 2 hours. Gummies and drinks tend to be faster (30–60 min) while baked goods may take longer (60–120 min). The #1 mistake is redosing too early — always wait at least 2 hours before taking more.
Can you overdose on THC?
Cannabis cannot cause a fatal overdose. However, taking too much THC can cause anxiety, paranoia, rapid heart rate, nausea, and disorientation — commonly called “greening out.” These effects are temporary (2–6 hours) and resolve on their own. Proper cannabis dosage prevents this.
How much weed should I put in a joint?
A typical joint contains 0.3–0.5 grams of flower. At 20% THC, that’s 60–100 mg of total THC — but you only absorb 20–30% through smoking, so the effective dose is 12–30 mg. Beginners should share a joint rather than smoking one alone, taking 1–2 puffs and waiting.
Does body weight affect how much THC I need?
Body weight has a moderate effect. Heavier individuals generally need slightly higher doses, but the relationship is not as linear as with alcohol. Tolerance, metabolism, and individual endocannabinoid system sensitivity play a bigger role. Our THC dosage calculator factors in body weight alongside these variables.
What is the difference between THC and CBD dosage?
THC is psychoactive and requires careful dosing. CBD is non-intoxicating and generally well-tolerated even at high doses (25–100+ mg). A 1:1 THC:CBD ratio often feels milder than the same amount of THC alone, as CBD moderates THC’s intensity.
How do I reset my cannabis tolerance?
A “tolerance break” (T-break) of 2–4 weeks is the most effective way to reset. CB1 receptors begin to recover within 48 hours, and most users return to near-baseline sensitivity after 2–3 weeks. You may experience mild sleep disruption and irritability for the first few days. Use our THC detox calculator to track your clearance timeline.
How long does a THC high last?
When smoked or vaped, a THC high typically lasts 1–3 hours, with peak effects around 30 minutes. Edibles produce a longer high of 4–8 hours, sometimes up to 12 hours at high doses. Concentrates fall somewhere in between at 1–4 hours. Duration depends on the dosage, your tolerance, and whether you’ve eaten recently.
Is 5mg of THC enough to feel?
For most people, yes. A 5 mg THC dose is considered a standard low-to-moderate dose. Beginners will likely feel noticeable relaxation and mild euphoria, while regular users may find it subtle. If you’re new to cannabis, 2.5 mg is a safer starting point — you can always take more on your next session, but you can’t take less once it’s consumed.

Content written and reviewed by the Pacific Grass team. Not medical advice.

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