Garden & Water Utilities
Practical calculators for compost inputs, seed layouts, irrigation use, rainwater storage, pool geometry, pond planning and garden beds.
Compost C:N Ratio Calculator
Blend editable brown and green material ratios.
Irrigation Zone Flow Calculator
Add emitter flow and estimate water per run.
Rainwater Tank Sizing Calculator
Estimate roof harvest and dry-spell storage.
Rainwater Roof Yield Calculator
Roof area, rainfall, coefficient and first-flush loss.
Rain Garden Size Calculator
Size a rain garden and check drain-down time.
Pool Chemical Dosage Calculator
Scale the product label dose to your pool volume.
Garden Bed Soil & Plant Count
Estimate soil volume and a spacing-based plant count.
Seed Spacing & Plant Count
Plan planting stations, seeds to sow and expected establishment.
Irrigation Runtime & Water Use
Estimate application runtime and weekly water use from measured flow.
Combined-Shape Pool Volume
Combine simple measured sections for a freeform pool estimate.
Pond Volume, Liner & Pump
Estimate pond volume, liner footprint and turnover flow.
Lawn Seed PLS & Bags
Bags of grass seed from area, purity, germination and seeding rate.