Hobby and Craft

  • Grass Seed Calculator
    Calculate how much grass seed you need for your lawn. Enter length, width, and seeding rate to get pounds of seed required for seeding or overseeding.
  • Sod Calculator
    Free sod calculator: enter your lawn length, width, waste %, and roll coverage to find total square feet, square yards, and rolls of sod needed.
  • Vegetable Seed Calculator
    Calculate how many vegetable seeds you need based on row length, seed spacing, and number of rows — with optional germination-rate adjustment.
  • Vegetable Yield Calculator
    Estimate your total vegetable harvest. Multiply the number of plants by the average yield per plant to plan your garden crop output in kg.
  • Tree Age Calculator
    Estimate the age of a tree from its trunk circumference or diameter and the species growth factor. Free, instant, non-invasive tree age calculator.
  • Tree Spacing Calculator
    Calculate trees per acre and total trees from row spacing and tree spacing. Free planting density calculator for orchards, forestry, and vineyards.
  • Concrete Calculator
    Calculate concrete volume, weight, and bag count for slabs, columns, and tubes. Supports mixed metric/imperial units, quantity multiplier, and 40/60/80-lb bag sizes.
  • Roofing Calculator
    Calculate actual sloped roof area from footprint and pitch (rise/run), with roofing squares, shingle bundles needed, waste buffer, and material cost.

Categories