About These Calculators
Get your garden right the first time. Calculate soil volumes for raised beds, plan seed spacing, figure out fertilizer application rates, and optimize your composting ratios.
Gardening Calculators
18 toolsRaised Bed Soil Calculator
Calculate soil volume needed for raised garden beds
Seed Spacing Calculator
Plan seed spacing and row layout for garden beds
Plant Spacing Calculator
Calculate how many plants fit in a bed with grid or offset spacing
Compost Calculator
Calculate green-to-brown ratio for balanced composting
Fertilizer Calculator
Calculate NPK fertilizer application rate by lawn or garden area
Soil Volume Calculator
Calculate soil needed for raised beds and containers
Irrigation Calculator
Calculate watering schedule and volume for your garden
Compost Ratio Calculator
Calculate green-to-brown ratios for composting
Greenhouse Temperature Calculator
Calculate the expected temperature inside a greenhouse based on outside conditions and design
Garden Watering Schedule Calculator
Calculate optimal watering frequency and amount for your garden based on plants, soil, and weather
Raised Bed Soil Volume Calculator
Raised Bed Soil Volume Calculator — calculate soil volume needed for raised garden beds
Drip Irrigation Flow Calculator
Design your drip irrigation system flow rates
Garden Spacing Calculator
Calculate optimal plant spacing and total plants needed
Compost C:N Ratio Calculator
Balance your compost pile's carbon to nitrogen ratio
Lawn Overseeding Rate Calculator
Calculate grass seed quantity for overseeding your lawn
Grow Light Coverage Calculator
Calculate grow light wattage and coverage for indoor plants
Mulch Volume Calculator
Calculate mulch needed for garden beds and landscaping
Soil Fill Volume Calculator
Calculate soil or fill dirt needed for any project
Frequently Asked Questions
Are these gardening calculators free?
Yes, all 18 calculators are completely free with no signup required. They run entirely in your browser — no data is sent to any server.
How accurate are these calculators?
Our calculators use industry-standard formulas and are regularly updated. However, they provide estimates — always verify critical calculations with a professional in the relevant field.
Can I use these calculators on my phone?
Yes, all calculators are mobile-responsive and work on any device with a web browser. No app download needed.
Do you save my calculations?
No. All calculations happen in your browser. We don't store any of your inputs or results. Your data stays on your device.
Can I embed these calculators on my website?
Select calculators offer embed codes that you can copy and paste into your website or blog. Look for the "Embed This Calculator" section on individual tool pages.