Free Garden Calculators
Calculate soil volumes, plant spacing, fertilizer rates, and more. Simple, accurate, and free garden planning tools.
Choose a Category
🌍 Soil Calculate soil volume, raised bed fill, topsoil, compost, and mulch quantities for your garden projects. 5 tools 🌱 Plants Plan plant spacing, seed quantities, planting depths, garden layouts, and find your USDA growing zone. 5 tools 🧪 Fertilizer Calculate fertilizer rates, NPK ratios, lawn fertilizer needs, compost tea, and soil amendments. 5 tools
Popular Tools
🌍 Soil Volume Calculator Calculate the volume of soil needed for garden beds, pots, and plantin... 🌍 Raised Bed Calculator Calculate how much soil, compost, and amendments you need to fill a ra... 🌍 Topsoil Calculator Calculate how many cubic yards or tons of topsoil you need to cover a ... 🌱 Plant Spacing Calculator Calculate how many plants fit in a garden bed based on area size and r... 🌱 Seed Calculator Calculate how many seeds you need based on garden area, plant spacing,... 🌱 Planting Depth Guide Find the correct planting depth for common vegetable seeds based on se... 🧪 Fertilizer Calculator Calculate how much fertilizer to apply based on garden area and desire... 🧪 NPK Ratio Calculator Decode fertilizer NPK numbers and calculate actual nutrient amounts pe... 🧪 Lawn Fertilizer Calculator Calculate how much lawn fertilizer to buy and apply based on your lawn...
About GardenCalc
GardenCalc provides free, accurate garden calculators for soil, plants, and fertilizer. Whether you are filling raised beds, planning plant spacing, or calculating fertilizer rates, all results are instant with no sign-up required.
Why Use GardenCalc?
- Accurate Garden Math: Based on proven horticultural formulas
- All Garden Types: Works for raised beds, in-ground gardens, and lawns
- Fertilizer Ready: NPK ratio and application rate calculators included
- Instant Results: No sign-up, no loading, just answers
- Free: No registration, no fees, no limits