悟る · vpd calculator
Cannabis VPD Calculator
Vapor Pressure Deficit drives transpiration — the master dial for healthy growth. Enter your room's conditions for a leaf-corrected VPD and the ideal band for your stage.
Enter your room's temp & humidity
Your VPD
1.10 kPa
In the ideal 0.8–1.2 kPa band for vegetative.
A number is a snapshot. Satoru tracks VPD against your strain's proven blueprint all grow long — and warns you before it drifts.
🔗 Embed this calculator free on your site
Paste this where you want it. It stays up to date automatically — no maintenance.
<iframe src="https://growsatoru.com/embed/vpd" width="100%" height="620" style="border:1px solid #e5e7eb;border-radius:16px;max-width:680px" title="Satoru vpd calculator" loading="lazy"></iframe>What is VPD?
VPD (Vapor Pressure Deficit) measures how much more moisture the air could hold — the “pull” on the plant to transpire. Dialing VPD into the right band per stage keeps stomata open, nutrient uptake steady, and mold at bay. It depends on temperature and humidity together, which is why chasing one alone misleads.