San Marcos, TX
Loading weather...
My Store: San Marcos
Open Today 7am-7pm
Find Stores

McCoy's Building Supply

  1. Shop Products
  2. DIY Center
  3. Pro Center

HOME > CALCULATORS


DIY Project Calculators

Trying to decide how much siding you should buy? How much insulation will you actually need for you attic? Don’t just guess! McCoy’s has great tools for estimating your project materials, so you don’t waste time making extra trips for more supplies or spend your hard-earned money on materials you don’t need. At McCoy’s, we do everything we can to help you get in, get out, and get back to building.

Siding Calculator

 

Adding siding to your house is a big job. You can make it easier by using our calculator to help you determine how many square feet of siding you need to get the job done.
Try it Out

CompareFertilizer_LP

Grass Seed Calculator

 

Do you have a new lawn or our overseeding? Use our calculator below to determine how much grass seed you need for the best lawn in the neighborhood.
Try it Out

RoofHealth_LP

Roofing Calculator

 

Do you need to add roofing shingles to your detached garage? Or maybe you are building a nice dog house for Rover. Use our calculator below to determine how many shingles you need for your small DIY project. We recommend contacting a professional roofer when adding to your home or other complicated roof structure.
Try it Out

FencePickets_LP

Picket Fencing Calculator

 

Building a new fence on your property can add character as well as security for your home. Use our calculator below to determine how many fence pickets you need to enhance your curb appeal.
Try it Out

T-Post_LP

T-Post & Ranch Fencing Calculator

 

As any rancher knows, a good fence is vital in any operation, small or large. To avoid chasing those runaways, use this calculator to determine how many t-posts and how much wire you will need.
Try it Out

Pavers Calculator

 

Ready to add a concrete paver patio? Use a quick calculation to get a rough estimate of how many pavers you will need for your project.
Try it Out

FertilizerCalculator_LP

Fertilizer Calculator

 

Fertilizer provides soil with crucial nutrients that promote plant growth. Determine how much fertilizer you need based on your desire nitrogen percentage.
Try it Out

Mulch_LP

Mulch Calculator

 

Mulching your lawn or garden can add protection from temperature drops and weeds. Use our calculator below to help determine how much you will need to cover your lawn or garden.
Try it Out

Cement_LP_header

Concrete Calculator

 

Are you working on a small DIY project that requires a concrete slab? Use this calculator to determine the amount of dry mix you need. Note: We suggest you consult a professional if you need concrete for a building foundation.
Try it Out

JM-Insulation_LP

Insulation Calculator

 

If you have existing insulation and it’s in good shape (you just don’t have enough of it) there’s no need to remove it. Blow-in insulation can be added on top of existing insulation to get the R-value you desire. Use the calculator to determine how many bags of blow-in insulation you will need for your project.
Try it Out

*We offer these calculators as a convenience to help estimate your project needs. Actual needs may differ based on other project-specific details.