How Much Weed to Use for Edibles: The Complete Ratio Guide
How many grams of cannabis you need per cup of butter or oil, for every dose target and batch size — with a step-by-step ratio calculator walkthrough.
Editorial Notes
BatchCraft Editorial Team
Chaady Research Desk
Content is written for educational recipe-planning use and cross-checked against the calculator, recipe gallery, and process guidance already published on the site.
Updated 2026-05-08
Recipe and planning pages are designed to work with the BatchCraft calculator workflow, including serving-size assumptions, prep notes, and batch-planning helpers.
The Short Answer: It Depends on Your Target Dose
There is no single universal ratio because "how much weed" depends on three things: (1) the THC% of your source material, (2) your target mg per serving, and (3) how many servings you want from the batch. The same 7 grams of flower will produce very different results depending on whether it is 15% or 25% THC.
The formula: (target mg per serving × number of servings) ÷ (THC% × 10 × decarb efficiency × infusion efficiency) = grams of source material needed. The BatchCraft calculator automates this — but this guide explains the math so you understand what you are doing.
Quick Reference: Grams Per Cup of Butter or Oil
These tables assume standard 20% THC flower, Conservative efficiency (42% overall), and typical recipe usage of 1 tablespoon of infused fat per serving.
| Desired mg/serving | Grams per cup of fat | Servings per batch | Total mg in batch |
|---|---|---|---|
| 5 mg (microdose) | 3–4g | 16 tbsp | ~80mg |
| 10 mg (standard) | 6–8g | 16 tbsp | ~160mg |
| 15 mg (moderate) | 9–12g | 16 tbsp | ~240mg |
| 25 mg (strong) | 15–18g | 16 tbsp | ~400mg |
| 50 mg (very strong) | 28–35g | 16 tbsp | ~800mg |
These are rough estimates. Your actual potency depends on source THC%, real efficiency, and serving size in your recipe. Use BatchCraft to calculate exact numbers for your specific batch.
How Material Type Changes the Ratio
Different cannabis products have wildly different concentrations, which dramatically affects how much you need per batch.
| Material | Typical THC% | Grams needed for 10mg × 24 servings | Notes |
|---|---|---|---|
| Trim | 3–7% | 25–50g | Economical but requires much more material |
| Shake / B-buds | 8–12% | 12–20g | Good value for large batches |
| Mid-grade flower | 12–18% | 8–14g | Most common home grow scenario |
| Top-shelf flower | 20–28% | 5–9g | Most common dispensary flower |
| Kief | 25–50% | 3–6g | Cleaner flavor, less plant matter |
| Concentrate (BHO/wax) | 60–80% | 1.5–3g | Small amounts, very potent |
| Distillate | 90–99% | 0.5–1g | No decarb needed, extremely concentrated |
Real Batch Examples with the Math
Example 1: You want to make 24 brownies at 10mg each using 20% dispensary flower and a slow cooker (standard efficiency ~64%).
- Total mg needed: 24 × 10mg = 240mg
- THC available per gram: 20% × 10 = 200mg/g
- After decarb (85%) and infusion (75%): 200mg × 0.85 × 0.75 = 127.5mg/g effective
- Grams needed: 240 ÷ 127.5 = ~1.9g of flower
- Round up to 2.5g to account for variation
Example 2: You want 48 gummies at 5mg each using kief at 35% THC, Conservative efficiency.
- Total mg needed: 48 × 5mg = 240mg
- THC available per gram of kief: 35% × 10 = 350mg/g
- After decarb (70%) and infusion (60%): 350 × 0.70 × 0.60 = 147mg/g effective
- Grams needed: 240 ÷ 147 = ~1.6g of kief
- Use BatchCraft to verify these numbers before cooking
The Saturation Point: Can You Use Too Much?
Yes. Carrier fats have a maximum binding capacity for cannabinoids — beyond the saturation point, excess THC simply does not bind and is lost in the plant matter during straining. For butter, this is roughly 35–45mg of cannabinoids per gram of fat. For coconut oil and MCT, the limit is similar.
For most home recipes, you will never approach saturation with flower — you would need to add 70+ grams of 20% flower to a single cup of butter to approach this limit. With concentrates or distillate, it is possible. If your math suggests very high source amounts relative to fat, split across multiple carrier batches.
The Right Tool: BatchCraft Calculator
Manual ratio math is useful to understand but error-prone in practice. The BatchCraft calculator walks you through every variable — source material type, grams, THC%, carrier type, efficiency settings, number of portions, and target mg per serving — and gives you an estimated mg per serving and total batch output before you start cooking.
It also warns you if your planned serving exceeds safe recreational thresholds (amber at 50mg, red at 100mg per serving). Use it every batch, especially when changing materials or recipe formats.
Frequently Asked Ratio Questions
Common questions about weed-to-butter and weed-to-oil ratios.
How Much Weed Per Cup of Butter?
For a standard dose of 10mg per serving (16 servings per cup of butter), you need approximately 6–8g of 20% THC flower using standard efficiency. For a lighter 5mg dose, use 3–4g. For a stronger 20mg dose, use 12–15g. These are estimates — use the BatchCraft calculator with your exact source material concentration and efficiency settings for a precise calculation.
Can You Put Too Much Weed in Butter or Oil?
Yes. Carrier fats have a maximum binding capacity for cannabinoids — called the saturation point — beyond which excess THC is simply lost during straining. For butter or coconut oil, this is roughly 35–45mg of cannabinoids per gram of fat. With typical flower (20% THC), you would need about 70+ grams per cup of butter to approach saturation, which is well beyond any practical home recipe.
How Much Weed Do I Need for 50 Gummies at 10mg Each?
For 50 gummies at 10mg each (500mg total) using 20% flower and standard efficiency (64% overall): 500mg ÷ (200mg/g × 0.64) = approximately 3.9g of flower. Round up to 4.5g to account for real-world variation. Always use the BatchCraft calculator for precise numbers — enter your exact source concentration, carrier amount, and efficiency preset.
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Safety Shortcut
If you are reading about dose mistakes or a batch that feels too strong, use the dedicated safety page instead of guessing your next step while stressed.