Free Gardening Calculators & Tools

Solve Your Gardening Problems in Seconds!

At Gardener’s Tool Shed, we build free calculators and tools to help you grow smarter, plan faster, and have more fun in the garden. From soil prep to planting calendars, everything here is 100% free — and built for real gardeners like you.

Our Tools

What’s In Your Shed?

Why Gardeners Love Our Tools

We’re dirt diggers and seed whisperers 🌱—here to turn your garden dreams into leafy reality! Our tools and calculators are your your secret weapon against wilted herbs and sad tomatoes.

✂️ Snip the guesswork with our plant-powered free garden apps
🌿 Grow your confidence (and your zucchini) with tips and interactive garden widgets
🛠️ Tools so easy, even your roses will blush

Because gardening should feel like playing in the soil—not solving algebra!

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Use in the garden with dirty hands!

Science-Backed Formulas

This Is where lab coats and muddy boots collide!

We geek out over ag studies so you don’t have to! Our tools blend university research with real dirt-under-the-fingernails experience – because nobody wants a PhD just to grow killer tomatoes.

100% Free Forever

No paywalls — just tools

Community-Driven Improvements

Created by the world’s rowdiest gardening squad!

We’ve harvested wisdom from 10,000+ green thumbs – because the best tools grow from real dirt, not just drawing boards. Your feedback is the fertilizer that makes our garden grow!

Suggest a tool and we’ll build it!

Need a Calculator Or Tool We Don’t Have?

Make A Suggestion

Turn Trash into Garden Treasure!

Our Most Popular Tools

“Meet your garden’s new best friends – the quirky calculators that turn kitchen scraps into plant superpowers!

🍌 Banana Peel Potassium Calculator – “For when your tomatoes need a smoothie”
☕ Coffee Grounds pH Wizard – “Brew-tifully balanced soil”
🥚 Eggshell Calcium Crusher – “No shells were left un-crunched”
🗑️ Compost Volume Oracle – “Because ‘pile of garbage’ isn’t a measurement”

The Gardener’s Tool Shed: Where food waste becomes garden gold (no alchemy degree required).

More Calculators

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The quiz even veggies can’t beet!

What Vegetable Are You? (The Quiz That’s 100% a-PEEL-ing

Ever wondered if you’re more of a crunchy carrot or a saucy tomato? Maybe a mysterious eggplant? (Okay fine, eggplant is technically a fruit—but we won’t tell if you don’t!)

This highly scientific* personality test will reveal your true vegetable spirit animal. Will you be salad royalty, soup’s secret MVP, or that one weird gourd people pretend to like? There’s only one way to find out…”

What Vegetable Are You?

Pro Tip: *Not actually scientific. Results may include: sudden cravings for farmers’ markets, the urge to photosynthesize, or existential crises about being in the ‘leafy greens’ category.*

Dig Deeper

Learn More with Our Guides

Master the science behind our calculators! Our expert guides break down the ‘why’ behind each tool—perfect for gardeners who love to learn while they grow.