Cannabis Grow Calculators
Use practical cannabis cultivation calculators, then read the method, assumptions and limitations behind each result.
Browse by Category
- Environment & Climate
- Lighting
- Airflow & HVAC
- Water & Irrigation
- Soil & Growing Media
- Harvest
- Planning & Budget
- Converters
Environment & Climate
Environment & Climate
VPD Calculator for Cannabis
Calculate leaf-to-air vapor pressure deficit using air temperature, relative humidity and leaf temperature offset.
Environment & Climate
Dehumidifier Capacity Calculator
Estimate daily moisture load and suggested dehumidifier capacity from irrigation data.
Lighting
Lighting
PPFD & DLI Calculator
Convert canopy PPFD and photoperiod into a daily light integral estimate.
Lighting
Grow Light Electricity Cost Calculator
Estimate fixture energy use and cost from actual wattage, schedule, quantity and utility rate.
Lighting
Grow Light Fixture Count Calculator
Estimate fixture count from canopy size and nominal light coverage.
Airflow & HVAC
Airflow & HVAC
Grow Room Ventilation Calculator
Estimate exhaust airflow from room volume, exchange time and an allowance for filters and ducts.
Converters
Converters
EC / PPM Converter
Convert between EC and PPM readings using the 500 or 700 meter scale.
Water & Irrigation
Water & Irrigation
Watering Volume Calculator
Estimate irrigation volume per event and total daily water use for your plants.
Water & Irrigation
Cannabis Dryback Calculator
Track root-zone water use from fully watered, current and dry container weights.
Water & Irrigation
Runoff Percentage Calculator
Calculate runoff percentage from irrigation applied and drainage collected.
Water & Irrigation
Nutrient Solution Mixing Calculator
Convert a product rate in mL/L into the total concentrate needed.
Soil & Growing Media
Soil & Growing Media
Growing Media Volume Calculator
Plan how much soil, coco or other substrate is needed to fill multiple containers.
Harvest
Harvest
Wet-to-Dry Harvest Calculator
Estimate final dry weight from fresh harvest weight and an expected retained percentage.
Harvest
Yield Efficiency Calculator
Compare dry yield with installed lighting power and canopy area.
Planning & Budget
Planning & Budget
Complete Grow Cost Calculator
Estimate total setup and operating costs across a complete grow.
Planning & Budget
Cannabis Grow Timeline Calculator
Estimate a completion date from stage durations through drying and curing.
Planning & Budget
Plant Spacing Calculator
Estimate grid capacity from canopy dimensions and plant spacing.
Try a broader term such as humidity, light, runoff, nutrients, yield or spacing.
