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Shower Pan Calculator — Slope, Mortar & Membrane

Calculate shower floor slope, mortar bed, waterproof membrane, and drain materials

Shower Floor

12 sq ft

Membrane

21 sq ft

Materials

$301

Shower Pan Materials

Floor Area
12 sq ft
Slope: 1.6" at walls → 1" at drain
Membrane
21 sq ft
Tile
14 sq ft

Mortar Bed

Mortar (60 lb bags)6
Volume2.6 cu ft

Cost Estimate

Mortar$48
Membrane$63
Drain Assembly$50
Tile + Thinset$90
Materials Total$301
Professional Install$480 – $960

What You'll Need

48 Inch Manual Tile Cutter Heavy-Duty Steel

$160-$1754.6
View on Amazon

16 inch Manual Tile Cutting Machine Porcelain

$100-$1154.5
View on Amazon

Montolit Masterpiuma EVO3 Tile Cutter 36 inch

$680-$7004.6
View on Amazon

JACO ThreadPro PTFE Thread Seal Tape 1/2 x 125ft

$6-$94.7
View on Amazon
SharkBite Push-to-Connect Contractor Kit

SharkBite Push-to-Connect Contractor Kit

$18-$284.6
View on Amazon

Dixon Valve PTFE Industrial Sealant Tape

$3-$64.6
View on Amazon

48 Inch Manual Tile Cutter Heavy-Duty Steel

$160-$1754.6
View on Amazon

16 inch Manual Tile Cutting Machine Porcelain

$100-$1154.5
View on Amazon

Montolit Masterpiuma EVO3 Tile Cutter 36 inch

$680-$7004.6
View on Amazon

JACO ThreadPro PTFE Thread Seal Tape 1/2 x 125ft

$6-$94.7
View on Amazon
SharkBite Push-to-Connect Contractor Kit

SharkBite Push-to-Connect Contractor Kit

$18-$284.6
View on Amazon

Dixon Valve PTFE Industrial Sealant Tape

$3-$64.6
View on Amazon

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Example Calculations

1Standard Residential

Inputs

ProjectMedium home
ScopeStandard

Result

ResultSee calculator

Enter your dimensions for accurate estimates.

2Large Project

Inputs

ProjectLarge home
ScopeFull

Result

ResultSee calculator

Larger projects need proportionally more materials.

Frequently Asked Questions

Q

How does this calculator work?

Enter your project dimensions and specifications to get material quantities, sizing, and cost estimates based on industry-standard formulas.

  • Input dimensions and project specs for accurate results
  • Calculations use standard industry formulas and sizing tables
  • Results include material quantities and cost ranges
  • Adjust inputs to compare different scenarios
Q

How accurate are these estimates?

Material quantities are within 5–10% of actual needs including waste. Cost estimates use national averages and vary 20–30% by region.

  • Material quantities accurate within 5–10% with waste factor
  • Cost estimates based on national averages, vary by region
  • Sizing follows industry standards and building codes
  • Verify with local codes and professional assessment
Q

Should I hire a professional?

Many aspects are DIY-friendly, but electrical, plumbing, and structural work typically require permits and professional expertise.

  • DIY-friendly: material purchasing, basic assembly, surface work
  • Professional recommended: electrical, plumbing, structural changes
  • Always check local codes and permit requirements first
  • Professional install adds 40–60% but ensures code compliance
Q

What building codes apply?

Building codes vary by jurisdiction but generally follow IRC for residential. Check with your local building department for specific requirements.

  • IRC covers most residential construction requirements
  • Electrical work: NEC applies nationwide
  • Plumbing: UPC or IPC depending on jurisdiction
  • Always pull required permits to maintain insurance coverage

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Thinset Calculator — Mortar for Tile

Calculate thinset mortar needed for tile installation. Get accurate estimates for bags required based on tile size, trowel notch size, and coverage area.

Drainage Calculator

Calculate French drain gravel, pipe, and landscape fabric quantities needed. Enter trench dimensions and materials for accurate drainage project estimates.

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Last Updated: Mar 19, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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