Lawn Spreader Triangle

The Lawn Spreader Triangle calculator computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) that are needed for a triangular lawn based on the manufacturer recommended area of coverage per bag and the length of the three sides of the lawn.

INSTRUCTIONS: Choose units and enter the following:

• (A) Lawn Side A
• (B) Lawn Side B
• (C) Lawn Side C
• (BC) Coverage per Bag

How Many Bags (nB): The calculator returns:

• (n) Number of Bags Needed to treat the lawn
• (A) Square footage of Yard
• (Ac) Area of Yard in Acres

The Math / Science

Few lawns are perfect triangles that be accurately measured by the length of three sides.  However, it's often a reasonable way to start, and one can approximate complex areas by sectioning them.  For more complex lawn size measurements, see below.

Lawns require seed and then regular treatment to have thick grass with few or no weeds. 

Lawn Care Product Coverage

The following table is for reference only and based on the manufacturer's published product coverage information.   Please recommend additions or corrections.

The treatments for lawns often come in the form of bags of treatment (seed, weed killer, fertilizer) from the home improvement store (e.g. Lowe's).  The common practice for the manufactures is to list the square feet covered by the application of one bag.  This calculator will tell you how many bags you need.

The formula for the number of bags of lawn treatment needed is:

  nB = A / BC

where:

• nB = Number of Bags of Lawn Treatment needed
• A = Area of Triangular Lawn (square footage of yard)
• BC = Bag Coverage (how many square feet per bag)

Lawn Spreader Calculators

The Lawn Spread Calculator helps you determin how many bags of product you need.   Spreaders are often used for grass seed, weed and feed, lime and lawn fertilizers. Choose the shape of the lawn from the list below or just use the Lawn Spreader Area if you know the acres, square feet, yards or meters.  Then enter the specifications of your lawn, and the area covered by one bag of product.  The calculator returns how many bags you need.

• Lawn Spreader Rectangle: Computes the number of bags of lawn treatment needed for a rectangular lawn based on the manufacturer recommended area of coverage per bag and the length and width of the lawn.
• Lawn Spreader on an Area: Computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) are needed for a lawn based on the manufacturer recommended area of coverage per bag and the area (square feet, acres, square yards or meters) of the lawn.
• Lawn Spreader Triangle: Computes the number of bags of lawn treatment needed for a triangular lawn based on the manufacturer recommended area of coverage per bag and the length of the three sides of the lawn.
• Lawn Spreader 4 Sided (non-Square): Computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) needed for a four sided lawn based on the manufacturer recommended area of coverage per bag and the length of the four sides and diagonal of the lawn.
• Lawn Spreader 5 Sided:: Computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) needed for a five sided lawn based on the manufacturer recommended area of coverage per bag and the length of the five sides and two diagonals of the lawn.

Lawn Care Calculators

• Mowing Calculator: Estimates the distance walked, area covered, calories burned mowing and time required to mow an area of grass based on mower cutting deck width, speed and whether its a push mower or riding mower.
  • Mowing Triangle: Mowing a triangle shaped area.
  • Mowing Rectangle: Mowing a rectangle shaped area.
  • Mowing 4 Sided non-Squared: Mowing a four sided area that does not have square corners.
  • Mowing 5 Sided: Mowing a five sided area.
  • Calories Burned Mowing Grass: Estimates the calories burned mowing (push or riding) based on person's weight and time spent mowing grass.
• Lawn Spreader Calculator: Functions to estimate the number of bags of lawn product (grass seed, weed killer, lawn fertilizer, lime) are need to for different shaped lawns (below). 
  • Lawn Spreader on an Area: Computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) are needed for a lawn based on the manufacturer recommended area of coverage per bag and the area of the lawn.
  • Lawn Spreader Triangle: Computes the number of bags of lawn treatment needed for a triangular lawn based on the manufacturer recommended area of coverage per bag and the length of the three sides of the lawn.
  • Lawn Spreader Rectangle: Computes the number of bags of lawn treatment needed for a rectangular lawn based on the manufacturer recommended area of coverage per bag and the length and width of the lawn.
  • Lawn Spreader 4 Sided (non-Square): Computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) needed for a four sided lawn based on the manufacturer recommended area of coverage per bag and the length of the four sides and diagonal of the lawn.
  • Lawn Spreader 5 Sided:: Computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) needed for a five sided lawn based on the manufacturer recommended area of coverage per bag and the length of the five sides and two diagonals of the lawn.
• Grass Seed Calculations use SPREADER calculators above with the grass seed specifications from the manufactures. 
• New Sod Calculator: Computes the number of sod pieces needed for an area based on the size of the pieces of sod.
  • New Sod Triangle: Computes the number of pieces of sod needed to cover a triangular shaped area such as a yard or field.
  • New Sod Rectangle: Computes the number of pieces of sod needed to cover a rectangular shaped area such as a yard or field.
  • New Sod 4 Sided: Computes the number of pieces of sod needed to cover a four sided (not squared) shaped area such as a yard or field.
  • New Sod 5 Sided: Computes the number of pieces of sod needed to cover a five sided shaped lawn area such as a yard or field.
  • New Sod Circle: Computes the number of sod pieces required to cover the given diameter of a circle.
  • New Sod Oval: Computes the number of sod pieces required to cover an oval.  It also provides the oval area and perimeter.
• Straw Cover Area Calculator: Computes the number of regular square-bales of straw needed to cover an area such as a field or garden for new grass seed.  The common bales are 2 string square bales of 14"x18"x"36" inches weighing between 40lbs and 60 lbs.
  • Bales of Straw over Rectangle: compute the number of regular square-bales of straw needed to cover new seed on a rectangle area (length by width).  .  
  • Market Price for Bales of Straw: Returns recent market survey on the price of straw bales.