Plan Your Garden With Confidence
Free gardening calculators powered by USDA zone data and agricultural research. Know exactly what to plant, when, and how much.
Garden Calculators
Raised Bed Soil Calculator
Calculate exactly how much soil, compost, and amendments you need for any raised bed size.
Try it →📅Planting Date Calculator
Enter your ZIP code to get personalized planting dates based on USDA zone and frost dates.
Try it →🌱Seed Spacing & Yield Calculator
Plan your garden layout with optimal spacing for maximum yield in your available space.
Try it →🤝Companion Planting Checker
Find out which plants grow well together and which ones to keep apart.
Try it →🧪Fertilizer Calculator
Calculate the right NPK ratio and amount for your plants and garden size.
Try it →💧Watering Schedule Calculator
Get a personalized watering schedule based on your plants, zone, and season.
Try it →Why PlantingCalc?
USDA Zone Data
Planting recommendations based on your hardiness zone and local frost dates.
Precise Calculations
Exact soil volumes, seed counts, and spacing — no more guessing at the garden center.
Grow More Food
Optimize your garden layout and timing to maximize your harvest season.