Free garden calculators
Garden math, done in your browser.
Instant calculators for mulch, soil, compost, topsoil, raised beds, and plant spacing. Type your measurements — get cubic yards, bags, and cost on the spot. No sign-up.
- 7
- Free calculators
- yd³ + bags
- Every result, both ways
- $0
- No sign-up, ever
- 100%
- Runs in your browser
Pick a tool
Browse all →Calculators
Compost Calculator
Top-dress or amend a bed — cubic yards, bags, and tons.
Open calculator →Plant Spacing Calculator
How many plants fit — square, triangular, or square-foot grid.
Open calculator →Topsoil Calculator
Order by the yard or the ton, bagged vs bulk.
Open calculator →Mulch Calculator
Stop overbuying — yards, bags, and coverage at your depth.
Open calculator →Raised Bed Soil Calculator
A full mix shopping list: topsoil, compost, and aeration.
Open calculator →Soil Calculator
Garden soil, fill dirt, or a custom depth.
Open calculator →
The why behind the numbers
Not sure how deep to mulch, or how much soil a 4×8 bed needs?
Our plain-English guides explain the formula, the reference numbers, and the common mistakes — so the calculator result actually makes sense.