Garden Tools & Calculators
Free calculators and planners for every stage of a garden project — from your hardiness zone and plant spacing to sod, paving and tree protection.
- 13 free tools
- Feet or metres
- No sign-up to calculate
- Save plans with a free account
Plan your planting
Start with your climate, then work out what goes where and what grows well together.
Soil, lawn & feeding
Order the right amount of soil, mulch, seed, sod and fertilizer — first time.
Build it
Cut lists and material take-offs for raised beds, patios, paths and walls.
Trees
Protect roots on a building site, size a planting pit, check a tree over, and price the work.
Why gardeners use them
From measurements to a shopping list
Measure one raised bed with a tape. Three calculators turn it into everything you need to buy — down to the screws.
- Answers you can order. Bags, boards, rolls and pallets — not just square feet.
- Feet or metres. Most measuring tools take either and convert as you switch.
- Built on published guidance. Tree tools name the standard behind each result.
- Free, and it keeps your work. No account to calculate. Sign in to save or send to a Workspace.
Shopping list
One 4 × 8 ft (1.2 × 2.4 m) raised bed
- 2×6 boards, 8 ft (2.4 m)
- 7
- 4×4 post, 8 ft (2.4 m)
- 1
- 3″ (76 mm) deck screws
- 24
- 4″ (102 mm) structural screws
- 24
- Base layer — wood chips
- 0.36 yd³ (0.28 m³)
- Raised bed mix, 2 cu ft (57 L) bags
- ~10
- Plants 12 in (30 cm) apart
- 45
Pressure-treated pine, ±20% regional range. Soil priced separately.
After the numbers
Plan Beyond the Calculators
Your saved plans connect to the rest of Plant Reference — design garden layouts in Workspaces and keep up with seasonal care using Maintenance Plans.
About Plant Reference