Accurate estimates for deck boards, lawn seed, mulch, plant spacing, and irrigation. No sign-up, no fluff — just the numbers you need.
Calculate how many deck boards you need — including waste allowance.
How many pounds of grass seed for your yard? Covers new lawns and overseeding.
Calculate seedCubic yards for bulk delivery or bag count for bagged mulch.
Calculate mulchHow many plants fit your bed? Supports grid and triangular offset patterns.
Calculate plantsHow long to run sprinklers per session based on target depth and soil type.
Calculate run timeGardenCalc.io gives you the same calculations a landscape professional would run — without the jargon. Every tool shows a full breakdown of how the number was reached so you understand exactly what you're buying and why.
Every calculator on this site is completely free to use. No account required, no email address, no ads before you get your answer. Just enter your measurements and get an accurate estimate in seconds.