Most Popular
Plant Spacing Calculator
Calculate how many plants you need for any garden bed, hedgerow, or bulb planting. Supports square, triangular, and offset grid patterns with a live visual preview of your layout.
Free Garden Tools
Garden Tools & Calculators
Free, professional-grade calculators for plant spacing, soil volume, mulch coverage, and more. No sign-up required.
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Soil & Mulch Calculator
Calculate how much soil, mulch, compost, or gravel you need for any project. Results in cubic yards, bags, and wheelbarrow loads with cost estimates.
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Fertilizer Calculator
Calculate exactly how much fertilizer your lawn or garden needs. Select your plant type, choose your fertilizer product, and get precise application rates in pounds and bags.
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Grass Seed Calculator
Calculate how much grass seed you need for a new lawn or overseeding. Choose your grass type and get precise coverage in pounds and bags.
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Sod Calculator
Calculate how many sod rolls or pallets you need. Factor in waste, choose your grass type, and get cost estimates for your lawn project.
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Tree Protection Zone Calculator
Calculate Tree Protection Zones (TPZ) using US (ANSI A300), Australian (AS 4970), and UK (BS 5837) standards. Essential for construction planning near trees.
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Tree Soil Volume Calculator
Calculate the minimum soil volume your tree needs to thrive based on mature canopy size, soil type, and rooting depth. Results in cubic feet, yards, and meters.
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Tree Risk Assessment Checklist
Walk through a guided 6-category visual assessment of your tree's health and structural condition. Get risk ratings based on ISA guidelines.
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Tree Service Cost Estimator
Estimate tree removal, pruning, and stump grinding costs. Business mode calculates minimum job pricing based on overhead, crew size, and profit margin.
Why Gardeners Choose Our Calculators
Built by gardeners, for gardeners. Professional results without the complexity.
100% Free
No sign-up, no paywall. Every calculator is free forever.
Mobile Friendly
Works perfectly on phones, tablets, and desktops.
No Data Collected
Your calculations stay in your browser. Nothing is tracked.
Professionally Accurate
Formulas vetted against industry standards and horticultural guides.
More Tools Coming Soon
We're building planner boards, plant lists, and more garden design tools. Check back soon!
Garden Planner
Plan your garden layouts and track your planting schedule. Organize beds, borders, and botanical projects.
Plant Lists
Create and manage custom plant lists for your garden projects, wish lists, and shopping trips.