Hobby and Craft

  • Bowl Segment Calculator
    Calculate miter angle, segment angle and segment length for segmented bowl turning rings. Enter segment count and ring radius to get exact saw angles.
  • Angle Cut Calculator
    Calculate the offset (rise) and diagonal cut length for a given run and cut angle. Free angle cut calculator for carpentry, trim, and metalwork.
  • Miter Angle Calculator
    Calculate the miter angle for any corner. Enter the corner angle and get the exact cut angle for each board plus the miter saw setting.
  • Hoop House Calculator
    Calculate the arc length of a semicircular hoop and the total cover material (sq ft) needed for your hoop house or high tunnel by width and length.
  • Epoxy Calculator
    Calculate how much epoxy resin you need for a surface by length, width, thickness and number of coats. Get gallons, fluid ounces and liters instantly.
  • Log Weight Calculator
    Estimate the weight of a log or round timber from its diameter, length and wood density. Free calculator using the cylinder volume formula.
  • Fire Glass Calculator
    Estimate how many pounds of fire glass you need for your fire pit or fireplace based on its length, width, and the glass depth you want.
  • Board Foot Calculator
    Calculate board feet of lumber from thickness, width, and length in inches. Get total board footage and cost for any number of boards instantly.
  • 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.
  • 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.
  • 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.
  • Bulb Spacing Calculator
    Calculate how many flower bulbs you need from bed area and spacing. Supports square and triangular (staggered) planting layouts with instant counts.
  • 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.
  • 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.
  • Potting Soil Calculator
    Calculate how much potting soil you need for round or rectangular pots and planters. Get total liters, cubic feet and dry quarts for any number of containers.
  • 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.
  • Plant Spacing Calculator
    Calculate how many plants fit in a garden bed based on spacing and area. Supports square and triangular (hexagonal) planting layouts.
  • Pine Straw Calculator
    Estimate how many pine straw bales you need for your landscape beds. Enter bed size and mulch depth to get bales and estimated cost.
  • Compost Calculator
    Calculate how much compost you need in cubic yards and cubic feet from your garden bed area and desired application depth.
  • CO₂ Grow Room Calculator
    Calculate the cubic feet of CO₂ needed to enrich your grow room to a target ppm. Enter room dimensions, target and ambient CO₂ levels.
  • Roofing Calculator
    Calculate actual sloped roof area from footprint and pitch (rise/run), with roofing squares, shingle bundles needed, waste buffer, and material cost.
  • 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.
  • Tile Calculator
    Calculate the exact number of tiles and boxes for any floor, wall, or backsplash. Accounts for grout gap, supports independent metric/imperial units for tile and surface, with a 5–10% overage recommendation and optional cost estimate.
  • Mulch Calculator
    Calculate exactly how much mulch you need — in cubic feet, cubic yards, or cubic meters — plus weight, bags required, and total cost. Supports rectangle, circle, triangle, or pre-computed total area, with bulk or bag pricing.

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