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GrowScope
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Free, embeddable, no signup

Free grow calculators

Small, single-purpose tools built on the exact same formulas GrowScope uses internally — not simplified or approximated versions. Use them here, or embed any of them on your own site for free; each one is self-contained and only needs an iframe.

VPD Calculator

Vapor pressure deficit from air temperature and humidity, checked against a stage-specific target range.

How VPD calculators work →

DLI Calculator

Daily Light Integral from PPFD and photoperiod, checked against stage-specific PPFD targets.

How to calculate DLI →

Pot Size Calculator

Estimated height and diameter for a given pot volume — useful for planning headroom and spacing.

Setup essentials guide →

Setup Test

Describe a hypothetical tent and equipment and run a full simulated grow cycle — light, ventilation, heat, humidity, noise, day by day — before you buy anything. This is the real in-app tool, not a simplified web version.