Plumbing Calculator
Calculate pipe material costs, fixture rough-in labor hours, and fittings for plumbing projects. Adjust pipe type, quantities, and labor rate to see your total.
Pipe Materials
Fixture Rough-Ins
How to Use This Calculator
- Select your pipe type (copper, PEX, CPVC, or PVC drain)
- Enter the total pipe run length in feet
- Enter the number of fittings (elbows, tees, couplings)
- Enter fixture quantities for each rough-in type
- Adjust the labor rate to match your market
The calculator shows material cost, fittings, labor hours, and total — before markup and overhead. Apply your own markup to get your selling price.
Rough-In Labor Hours by Fixture
| Fixture | Rough-In Hours | Notes |
|---|---|---|
| Toilet | 3.0 | Closet flange, supply, shutoff |
| Bathroom Sink | 2.5 | Supply lines, drain, P-trap |
| Kitchen Sink | 3.5 | Supply, drain, disposal connection, dishwasher hookup |
| Bathtub / Shower | 4.0 | Valve, supply, drain, overflow |
| Water Heater | 4.0 | Supply/return, T&P valve, expansion tank |
FAQ
How do you estimate plumbing labor hours?
Plumbing labor is typically estimated by fixture count. A toilet rough-in takes about 3 hours, a bathroom sink about 2.5 hours, and a kitchen sink about 3.5 hours. Pipe installation adds time based on material — copper runs about 8 linear feet per hour, PEX about 12. Always add 10-15% for unforeseen conditions.
What's the difference in cost between copper and PEX?
PEX is significantly cheaper than copper for both material and labor. PEX material costs $0.75-1.10 per foot vs. $4.50-9.50 for copper. PEX also installs faster because it's flexible and requires fewer fittings. Copper is preferred where code requires it or for exposed runs where appearance matters.
How many fittings should I estimate per pipe run?
A rough rule of thumb is 1 fitting per 5-8 linear feet of pipe, depending on the layout complexity. A straight run in an open basement might need 1 per 10 feet, while a bathroom rough-in with multiple turns might need 1 per 3-4 feet. Count your actual layout when possible.
Should I include waste factor for plumbing materials?
Yes. A 10% waste factor is standard for pipe and fittings. This covers cuts, mistakes, and short pieces that can't be reused. For complex layouts or remodel work, use 15%.
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