Fertilizer Dilution Calculator
Convert fertilizer label instructions into a safer diluted dosage for indoor plants.
Fertilizer Tools
Fertilizer Schedule Calculator
Build a seasonal fertilizing schedule for your plants.
NPK Fertilizer Calculator
Break down any NPK fertilizer into elemental nitrogen, phosphorus, and potassium by weight, and see what target N rate your plants need.
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Frequently asked questions
What are plant calculators?
Plant calculators are interactive tools that help you make plant care decisions based on your plant type, pot size, light, soil, season, symptoms, and care habits.
Are these plant tools free?
Yes, the plant calculators and care tools on this page are free to use.
Can these tools diagnose plant problems?
Some tools can help identify likely causes of common plant symptoms such as yellow leaves, brown tips, drooping leaves, leaf curl, spots, pests, and root rot. They are meant for guidance, not professional diagnosis.
Which tool should I use if my plant is dying?
Start with the Why Is My Plant Dying? tool or the Plant Problem Diagnosis tool. If you already know the main symptom, use a specific tool such as Yellow Leaves Diagnosis Tool, Brown Tips Diagnosis Tool, or Root Rot Risk Checker.
Which tool helps with watering?
Use the Plant Watering Calculator to estimate watering frequency and the Water Amount Calculator to estimate how much water to use.
Which tool helps me choose a plant?
Use Best Plant for My Room Finder, Beginner Plant Finder, Low Light Plant Finder, Office Plant Finder, Balcony Plant Finder, Bathroom Plant Finder, or Pet-Safe Plant Finder.