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Gardening Tools

Soil, seeds, spacing and watering math. 20 free tools, no sign-up.

Raised Bed Soil Volume CalculatorEnter bed length, width and fill depth to get the cubic feet, cubic yards and bags of soil to fill a raised garden bed.Garden Bed Soil Mix CalculatorSplit a raised bed fill into compost, topsoil and aeration by percent to see the cubic feet of each ingredient for a balanced blend.Seed Spacing CalculatorEnter bed size and the spacing between plants and rows to find how many plants fit and how many seeds to sow at your germination rate.Triangular Plant Spacing CalculatorCompare offset staggered planting versus square grid to fit more plants in the same bed and see the extra plants gained.Compost Carbon to Nitrogen Ratio CalculatorEnter browns and greens by weight with their carbon to nitrogen ratios to blend a compost pile near the ideal 30:1 target.Plant Watering Amount CalculatorEnter your garden bed area and target inches of water per week to find gallons needed and how long to run a hose or sprinkler.Greenhouse Heater Size CalculatorEnter greenhouse dimensions, inside and outside temperatures to find the BTU per hour and watts of heater you need to hold your target.Square Foot Garden PlannerEnter your grid of one foot squares and a crop to see plants per square and total plants for a Mel Bartholomew style raised bed.Fertilizer NPK Rate CalculatorEnter your bag analysis, target pounds of nitrogen per 1000 sq ft and area to find pounds of product to apply and the P and K it supplies.Seed Starting Date CalculatorEnter your last spring frost date and weeks to start indoors to find the exact sow date and transplant date for your seedlings.Frost Free Planting Date CalculatorEnter your last spring and first fall frost dates to find the safe planting window and the length of your growing season in days.Vegetable Harvest Yield EstimatorEnter number of plants and expected yield per plant to estimate total harvest in pounds and pounds per square foot of garden bed.Potting Soil Bag CalculatorEnter pot size and shape and how many pots to fill to find total quarts and bags of potting mix you need.Rain Barrel Capacity CalculatorEnter your roof catchment area and rainfall to see the gallons a storm collects and how many barrels it takes to store the runoff.Drip Irrigation Flow CalculatorEnter number of emitters and their flow rate to find total gallons per hour, run time for a watering goal and daily water use.Soil pH Amendment CalculatorEnter current and target soil pH and bed area to estimate pounds of lime to raise pH or elemental sulfur to lower it.Tree Spacing CalculatorEnter your plot size and the spacing between trees and rows to find how many fruit or shade trees fit and the trees per acre.Cover Crop Seed Rate CalculatorEnter your plot area and the seeding rate in pounds per acre or per 1000 sq ft to find the pounds of cover crop seed to buy.Garden Fence Material CalculatorEnter the perimeter of your garden and post spacing to find the number of posts, gates and total fencing length you need to buy.Grow Light Coverage CalculatorEnter your grow area and target PPFD or watts per square foot to estimate the light wattage and coverage for seedlings and indoor plants.

Free gardening tools: raised bed soil volume, seed spacing, plant watering, fertilizer NPK, frost date, drip irrigation and grow light coverage calculators. All 20 tools are free, run entirely in your browser, and need no sign-up.

Frequently asked questions

Are these gardening tools free?

Yes. Every gardening tool on yourhack.ai is completely free, with no sign-up and no usage limits.

Do these gardening tools work on mobile?

Yes. They run in any modern web browser on phone, tablet or desktop. There is nothing to install.

Is my data private?

Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.

How many gardening tools are there?

There are currently 20 free gardening tools here, and we add more regularly.

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