Cannabis Grow Tools & Calculators

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Light. Data. Growth. Smarter cultivation starts here.

Your Digital Cannabis Growing Toolbox

Free tools to dial in your lighting, airflow, nutrients, and more. Built for beginners and pros alike — no signups, no spreadsheets, just smarter growing.

Whether you're cultivating in a grow tent, closet, or commercial facility, these free cannabis grow tools help you plan with precision. From calculating PPFD and DLI to optimizing light coverage and airflow, the GrōHaus digital toolbox makes data simple — and results better.

Smarter tools. Simpler growing. Better results. Explore your digital toolbox below.
Grow Tools

Lighting Tools

Calculate DLI, PPFD, and grow light wattage for any space or stage.

Best for planning light coverage & intensity

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Environmental Tools

Dial in your BTU, CFM, and VPD to optimize grow room climate.

Best for airflow, temp, humidity

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Growing Tools

Generate nutrient schedules and find the right pot size for your grow.

Best for feed planning & container sizing

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Propagation Tools

Clone timers, seed soak calculators, and germination tracking.

Best for early-stage success

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Harvest Tools

Dry/cure planners, yield estimators, and harvest timing guides.

Best for post-grow planning

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Nutrient Monitoring

EC/PPM converters, pH targets, and flush tracking tools.

Best for feed tracking & water quality

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Grow Journal Tools

Cycle tracking, grow logs, and printable task planners.

Best for long-term success

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Strain Selector

Find the right strain for your grow style, setup, and goals.

Best for personalized planning

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No data collection. No account required. Just free tools designed by growers, for growers.

CREATE A CUSTOM GROW SETUP IN MINUTES

Use the Grow Setup Wizard to build your ideal tent setup. Answer a few quick questions and get a personalized equipment list tailored to your space, experience, and goals.

Launch the Grow Setup Wizard →
Grow Checklist Get the Free Home Grow Checklist →
Cannabis Learning Center Visit the Learning Center →

Cannabis Grow Calculators FAQ

Q: Who are these tools for?
A: Home growers, tent growers, and commercial cultivators alike. If you're managing light, space, or environment — these tools are for you.
Q: Are these tools accurate?
A: They’re built using horticultural standards, proven formulas, and real grower feedback. We balance precision with ease of use.
Q: Are these calculators free?
A: 100% free. No signups, no spam. Just smarter growing.
Q: Can I use these tools for vegetables or houseplants?
A: Absolutely. Just adjust the target PPFD or DLI range based on your crop type.

Smarter Growing Starts Here

At GrōHaus, we believe every grower deserves smart, simple tools. Our free cannabis grow calculators help you understand and optimize your lighting, environment, and grow tent planning — no complicated spreadsheets required.

Whether you're dialing in PPFD, calculating DLI, or planning your next grow light upgrade, this toolbox is here to help you grow better, faster, and more confidently.

Explore the GroHaus Cannabis Growing Learning Center

Whether you’re just starting out or looking to optimize your grow, the GroHaus Cannabis Growing Learning Center has you covered — from seed to harvest and beyond. Discover expert guides, supply checklists, lighting advice, nutrient tips, and much more.

Visit the Learning Center