A tiny plot.
A precise plan.
Free calculators for the decisions that happen before anything grows—soil volume, seed count, spacing, water, timing and protection.
Do the garden math
before the garden work.
Every tool shows its formula, assumptions and practical limits—because a useful result should be easy to check.
Raised bed soil
Calculate cubic feet, cubic yards, liters and bags of soil for any rectangular raised garden bed.
Plant spacing
Estimate how many evenly spaced plants fit in a rectangular garden bed.
Seed starting date
Find an indoor seed-starting date by counting weeks before your last frost date.
Garden water
Convert inches of weekly water over a garden area into gallons.
Rainwater harvest
Estimate gallons captured from roof area, rainfall and system efficiency.
Fertilizer
Calculate fertilizer product needed from area, nitrogen target and the bag's nitrogen percentage.
How much soil
does that bed hold?
Measure the inside of the frame, choose a fill depth, and get bulk volume plus whole bags instantly.
Your bed
Your soil plan
Use this as a planning estimate. Verify product labels, local conditions and supplier packaging before buying or applying materials.
One garden.
Five kinds of decisions.
Move from physical space to sowing, watering, landscape care and season extension without losing the assumptions.
Soil, compost, mulch and container-volume calculators for beds and pots.
5 tools + guide↗02Seeds & spacingPlant counts, germination checks, seed quantities and calendar tools for sowing plans.
5 tools + guide↗03Water & irrigationWater-volume, runtime, drip-flow and rain-catchment calculators for efficient irrigation.
4 tools + guide↗04Lawns & landscapeSeed, fertilizer, lime and fabric calculators for outdoor coverage projects.
4 tools + guide↗05Season & shelterSuccession dates, protective fabric and preliminary greenhouse calculators.
4 tools + guide↗Measure.
Adjust.
Grow.
- 01
Measure the real space
Use inside bed dimensions, treated area, actual emitter counts or tested flow.
- 02
Expose the assumption
Spacing, bag size, germination, application rate and efficiency stay editable.
- 03
Verify locally
Use packet, product-label, soil-test and extension guidance before acting.
Make the next garden
decision measurable.
Twenty-two free tools. No account. No mystery math.
Open the tool library →