About GardenCalc

GardenCalc is a free collection of garden calculators designed to help home gardeners, landscapers, and horticulture enthusiasts plan and manage their gardens with confidence.

Our Mission

We believe every gardener deserves access to accurate, easy-to-use calculation tools without paywalls or sign-up requirements. All our calculators run entirely in your browser.

What We Offer

• Soil volume and raised bed calculators
• Plant spacing and seed quantity calculators
• Fertilizer rate and NPK ratio calculators
• Lawn care and soil amendment calculators

Accuracy

Our formulas are based on established horticultural guidelines from university extension services and standard garden math. Results are estimates and should be verified with soil tests and local expert advice for critical applications.