Cannabis Grow Yield Calculator

Calculator Inputs

Example Data Table

Formula Used

Gross wet yield

plant count × average wet yield per plant

Gross dry yield

gross wet yield × dry conversion rate

Yield after success rate

gross dry yield × harvest success rate

Expected usable dry yield

yield after success × (1 - trim loss - sample loss - waste loss)

Productivity metrics

dry yield per plant = expected dry yield ÷ plant count

yield per square foot = expected dry yield ÷ canopy area

grams per watt = expected dry yield ÷ light watts

cost per gram = cycle cost ÷ expected dry yield

The conservative and optimistic values use the confidence range percentage. These are planning ranges. They are not guarantees.

How To Use This Calculator

1. Enter the number of plants allowed under your local rules.
2. Add the average wet yield per plant in grams.
3. Set the dry conversion rate.
4. Add success, trim, sample, and waste loss percentages.
5. Enter area, light watts, and cycle cost for efficiency records.
6. Press the calculate button.
7. Review the result section above the form.
8. Use the CSV or PDF button to save a report.

Yield Planning Article

A Practical Estimate

A yield calculator gives a planning estimate. It does not replace legal, safety, or agricultural review. Always use it only where local rules permit cultivation. The tool on this page focuses on records. It turns basic project inputs into dry yield, area productivity, light productivity, and cost efficiency.

Why Yield Planning Matters

Yield planning helps teams compare expected harvest outcomes before a cycle begins. It also helps with budgets. A grow space can look productive, yet small losses can change the final dry weight. Drying shrinkage, trimming, testing samples, crop loss, and general waste all reduce the usable result. Seeing each factor separately makes the final number easier to explain.

Key Inputs To Review

Start with the number of legal plants. Add the average wet weight per plant. Then enter the dry conversion rate. Many crops lose moisture during drying. The calculator also asks for harvest success, trim loss, sample loss, and waste. These fields build a more cautious estimate than a simple plant count formula. Area and light inputs help compare different rooms or tents. Cost inputs show the expense per dry gram.

How To Read The Results

The expected result is the main estimate. The conservative and optimistic values create a range around it. A range is useful because real harvests vary. Plant health, genetics, environment, handling, and measurement methods can all affect the result. The chart compares the range visually. The table gives numbers that can be exported for internal records.

Good Record Habits

Use consistent units for every cycle. Weigh wet material the same way each time. Record drying and trimming losses separately. Keep notes about unusual events. Compare results across many cycles instead of trusting one harvest. This makes trends easier to see.

Responsible Use

This calculator is for lawful planning and documentation only. It does not provide cultivation instructions, legal advice, sales advice, or compliance approval. Rules can vary by country, state, city, license type, and plant count. Check your local requirements before using any estimate for decisions. When in doubt, ask a qualified professional or local authority. Document assumptions clearly, and keep exported reports with dated notes for audits, reviews, and compliance files.

FAQs