Raised Bed Soil Calculator
Find the exact cubic feet of soil mix your bed needs.
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Free gardening tools & calculators that do the math for you
Measure, plan and plant with confidence. Accurate calculators and no-fluff guides to help you grow more — without the guesswork.
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- Glossary Terms
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- Updated for 2026
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The calculators gardeners reach for again and again — no signup, no email, just answers.
Popular Popular Plant Spacing Planner
Fit the right number of plants in every square foot.
Use ToolPopular Frost Date Calculator
First & last frost dates for your hardiness zone.
Use ToolWatering Needs Calculator
How many gallons your garden bed needs each week.
Use ToolNew Compost Ratio Calculator
Dial in the ideal green-to-brown compost balance.
Use ToolMulch Depth Calculator
Bags of mulch needed for any area at any depth.
Use ToolFertilizer NPK Calculator
Turn a soil test into pounds of nutrients per bed.
Use ToolGarden Yield Estimator
Predict your harvest from your planting plan.
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Every tool grouped the way you actually think about the garden.
Soil & Raised Beds
Soil volume, blends, bed dimensions and drainage.
19 toolsPlant Spacing
Square-foot layouts and companion spacing.
10 toolsWatering & Irrigation
Drip flow rates, run times and rainwater catchment.
16 toolsFertilizer & Nutrients
NPK, soil pH and organic dosing calculators.
13 toolsPlanning & Yield
Season planners, succession sowing and harvest math.
20 toolsIndoor & Hydroponics
Grow light, nutrient solution and reservoir sizing.
18 toolsLawn & Turf
Seed rates, sod counts and sprinkler run times.
10 toolsSeeds & Propagation
Germination tests, sowing density and potting mixes.
14 toolsLandscaping & Hardscape
Rock tons, pine straw bales and material coverage.
22 tools
Deep dives
View all guidesLatest Guides & Buying Advice
Research-backed reads that turn tool results into a plan you can actually use.
6 Best Raised Bed Kits of 2026, Compared Without the Hype
Six real kits ranked on verifiable specs, professional tests and long-term owner feedback — no invented lab results.
Mar 4, 20269 min readRead moreHow Deep Should Soil Be for Vegetables? A Zone-by-Zone Guide
Root depth charts for 40+ crops, plus the exceptions that trip up new gardeners every spring.
Feb 21, 20268 min readRead moreDrip Irrigation Sizing: Emitters, Zones & Run Times
A plain-English walkthrough to design a system that waters evenly without a pressure headache.
Feb 8, 202611 min readRead moreCompost vs. Fertilizer: What Your Beds Actually Need
When to feed the soil and when to feed the plant — with a decision tree you can reuse every season.
Jan 29, 20268 min readRead more
Growing guides
View all plantsPopular Plants to Grow
One plant per page — when to plant it, how much sun and water it wants, when to harvest and what to do when something goes wrong.
Tomato
Solanum lycopersicumThe garden's king fruit-vegetable: plant deep after frost in full sun, water on a steady rhythm, and choose determinate or indeterminate to match how you want to harvest.
Fruit Vegetables & Squash7 min readGrowing GuideBell Pepper
Capsicum annuumThe warmth-obsessed summer fruit: set bell peppers out only when nights hold above 55°F, keep moisture even, and leave the fruit on the plant until it changes color.
Fruit Vegetables & Squash7 min readGrowing GuideLettuce
Lactuca sativaThe cool-season salad baseline: sow shallow in light, keep growth uninterrupted with steady water and nitrogen, and harvest outer leaves before summer heat turns the plant bitter.
Leafy & Stem Vegetables7 min readGrowing GuideGarlic
Allium sativumThe autumn-planted bulb: set garlic cloves pointy-end up six weeks before hard frost, mulch deep, cut the scapes, and dig when the lower leaves brown.
Root, Bulb & Tuber Vegetables7 min readGrowing Guide
Plain English
View all termsGardening Terms, Explained
The vocabulary behind every seed packet, label and calculator answer — defined once, properly, then put to work.
Annual
nounA plant that completes its entire life cycle, from seed to seed, in a single growing season, then dies.
Botany & Plant Basics7 min readFull DefinitionSoil pH
nounA 0-14 measure of how acidic or alkaline the soil solution is, and therefore how much of each nutrient a plant root can actually reach.
Soil & Compost7 min readFull DefinitionHardiness Zone
nounA map band showing the average annual extreme minimum winter temperature of a place, used to judge whether a perennial plant can survive your coldest nights.
Light, Climate & Zones7 min readFull DefinitionN-P-K
nounThe three numbers on a fertilizer bag: the percentage by weight of nitrogen, phosphate and potash, listed in that order and never as the elements alone.
Fertilizer & Nutrients7 min readFull Definition
Why Chlorova
Built for gardeners who want it right the first time
Free & Accurate Tools
Every calculator is engineered on published horticultural formulas and stays 100% free — no trials, no paywalls.
Advice You Can Trace
Guides lean on extension research, published product specs and documented owner feedback — so recommendations hold up in real beds, not just on paper.
Regularly Updated for 2026
Data, pricing and product picks are reviewed on a rolling schedule so nothing goes stale on you.