One gram of kratom powder usually contains about 7–15 mg mitragynine; studies show a broader 7.5–26.6 mg per gram depending on source.
Kratom leaves carry many alkaloids, and the dominant one is mitragynine. The amount in a single gram varies by plant genetics, growing region, harvest timing, processing, and whether you’re looking at plain powder or a fortified extract. The figures below come from peer-reviewed lab work and give you a clear way to estimate milligrams from labels or a certificate of analysis (COA).
Mitragynine Per Gram In Kratom Powder: Typical Ranges
Across published lab data, plain plant material tends to land near the mid-teens (mg/g) with outliers below and above. Commercial samples tested by research groups in the U.S. showed single-digit to low-teens mg per gram, while field work on mature trees in Thailand reported a wider span. Put simply: most plain powders hover near ~1% by weight, yet the leaf itself can present anywhere from ~0.75% to ~2.66% depending on the tree and conditions.
Quick Reference Table (Early Overview)
This table compresses the main lab-backed figures and helps you translate percent to mg per gram. Values reflect ranges observed in studies; brands and lots can differ.
| Material/Form | Mitragynine (% by weight) | Mitragynine (mg per gram) |
|---|---|---|
| Plain Leaf (Thailand field samples) | 0.75%–2.66% | 7.5–26.6 mg/g |
| Plain Powder (commercial lots, lab-measured) | ~0.8%–1.2% common band | ~8–12 mg/g |
| Literature Range For Commercial Leaf Products | ~1%–6% (broad) | ~10–60 mg/g |
How to read this: percent × 10 = mg per gram. So 1.0% means ~10 mg mitragynine in 1 g of powder; 2.0% means ~20 mg per gram.
Where These Numbers Come From
Two reliable data streams inform the table. First, a peer-reviewed plant-science survey of naturally growing trees in Thailand quantified mitragynine between 7.5 and 26.6 mg per gram of dried leaf. Second, a laboratory study of U.S. retail products found commercial powders clustering near the low-teens mg per gram and noted that the literature records commercial leaf between ~1% and 6% by weight. These sources align on one point: the alkaloid content swings with botany and processing, and plain powder often sits near ~1%.
What “Plain Powder” Means
Plain powder refers to dried, milled leaf with no added extract. Extract powders and resins can be much stronger by design. If a jar lists “extract 10%,” that means ~100 mg mitragynine per gram, not the ~8–12 mg/g seen in many plain powders.
Factors That Shift Milligrams Per Gram
Several levers move the mitragynine number up or down. No single lever explains all the swing; think of these as stacked influences.
Growing Region And Light
Field sampling in Thailand linked higher mitragynine with specific environmental conditions, including higher light and certain soil variables. That’s one reason trees from different locations can land in different mg/g bands.
Genetics And Tree Age
Different trees don’t behave the same. The Thai survey tied larger trees with higher per-gram alkaloid yield. Retail products also appear to split into chemotypes with different accompanying alkaloid profiles.
Harvest, Drying, And Milling
Leaf maturity, drying temperature, and storage age can nudge alkaloid content up or down. Milling to a fine powder doesn’t change the total alkaloid present, but it can affect measurement if moisture is uneven.
Product Type (Plain Vs. Extract)
Plain leaf and plain powder reflect the plant’s baseline. Extracts are concentrated by solvents or other processes, and labels often list a percent that directly converts to mg/g. A 20% extract is ~200 mg per gram.
How To Estimate From A COA Or Label
Many vendors post a COA. Here’s a short method to turn that into a per-gram estimate:
Step-By-Step
- Find the mitragynine percentage on the COA or label.
- Multiply that percent by 10 to get mg per gram (1% → 10 mg/g; 1.2% → 12 mg/g).
- Multiply mg/g by your measured scoop or capsule weight to estimate total mg per serving.
Capsules vary in fill. Weigh one on a pocket scale to avoid guessing. Plain powder commonly sits near ~1% in many lots, but always check the current batch when a COA is available.
Worked Examples With Plain Powder
Use these as math templates only. They’re not dosing advice; the purpose here is to help you translate labels into numbers.
Example A: Powder At 1.0%
1.0% × 10 = ~10 mg/g. A 2-gram scoop would carry ~20 mg mitragynine.
Example B: Powder At 1.8%
1.8% × 10 = ~18 mg/g. A 2-gram scoop would carry ~36 mg.
Example C: Powder At 0.9%
0.9% × 10 = ~9 mg/g. A 1.5-gram scoop would carry ~13.5 mg.
Serving Estimates Across Common Potency Bands
This second table helps you scan rough totals across serving sizes using two plain-leaf bands often seen in studies. Pick the column that matches your COA or label best.
| Serving Size (g) | ~8 mg/g Band | ~20 mg/g Band |
|---|---|---|
| 0.5 g | ~4 mg | ~10 mg |
| 1.0 g | ~8 mg | ~20 mg |
| 1.5 g | ~12 mg | ~30 mg |
| 2.0 g | ~16 mg | ~40 mg |
| 2.5 g | ~20 mg | ~50 mg |
Plain Powder Vs. Extracts: Why The Gap Can Be Huge
Plain powder reflects the leaf’s natural range. Extracts can spike the concentration by design. When a label reads “10% mitragynine,” that’s ~100 mg per gram. “45%” would be ~450 mg per gram. If an extract is blended back into plain powder, the final number depends on the ratio. Without a batch-specific COA, you can’t infer the exact mg/g for a blend.
Why One Bag Reads 0.9% And Another Reads 1.8%
Two plain powders from different trees or regions can test very differently. The Thai field study mapped higher alkaloid output to sites with higher light and certain soil traits. A U.S. lab survey also showed two chemotypes across store-bought lots. That’s why a COA tied to the exact batch beats any blanket claim.
Simple Calculator Logic You Can Apply
Use this pocket formula anytime you see a percentage:
- Percent → mg per gram: percent × 10.
- Mg per gram → percent: mg per gram ÷ 10.
- Per-serving mg: mg per gram × grams consumed.
That’s all the math you need to translate labels or COAs into practical numbers you can compare across brands and batches.
Reading Labels And Links That Add Clarity
For background on the plant, chemistry, and safety context, see these authoritative pages. The aim isn’t to send you on a chase, just to anchor the numbers and terminology used here:
- NIDA on kratom describes the main alkaloids and general effects.
- DEA drug fact sheet outlines plant basics and alkaloid names used on COAs.
Putting It All Together
If you’re looking at plain powder with a current COA, a result near the low-teens mg per gram is common. Leaf sampled in the field can run from about 7.5 mg/g up to the mid-twenties. A label that lists 1% translates to ~10 mg/g; 2% translates to ~20 mg/g. Extracts sit in a different league, and the percent on the label tells you the story right away.
Notes On Safety And Variability
This guide explains how to translate label data into mg per gram and shows what peer-reviewed studies measured in leaf and commercial powders. It doesn’t recommend use, dosing, or medical decisions. Laws and rules can vary by location, and product strength can change across batches. When in doubt, consult a licensed clinician and check current regulations where you live.
Sources Referenced In The Ranges Above
Key figures in this article come from peer-reviewed work in plant science and analytical chemistry. One field study on naturally growing trees in Thailand reported 7.5–26.6 mg/g of dried leaf, and a lab survey of commercial powders showed ~8–12 mg/g in tested lots, alongside a broader literature band of ~1–6% for commercial leaf products. For clarity, the article also links to government overviews that define terms and context used by labs and regulators.
FAQ-Style Topics Aren’t Included
This page keeps everything in one flow with no standalone FAQs, so readers get the full answer without detours.