Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Plumbing
Plumbing Fixture Unit Calculator
Add up the drainage fixture units (DFU) for every toilet, sink, shower, bathtub, and appliance in a building to find the correct supply and drain pipe sizes per plumbing code. Essential for new construction, additions, or remodels.
Fill in the required fields to see your result.
Plumbing
Pipe Expansion Joint Calculator
Calculates how much a pipe will elongate or contract due to a temperature change, accounting for the thermal expansion coefficient of steel, copper, or aluminum. Essential for sizing expansion joints and loops in piping systems.
Fill in the required fields to see your result.
Key differences
| Plumbing Fixture Unit Calculator | Pipe Expansion Joint Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 5 | 3 |
| Result | Total Fixture Units (FU) | Expansion (inches) |
| What it does | Add up the drainage fixture units (DFU) for every toilet, sink, shower, bathtub, and appliance in a building to find the correct supply and drain pipe sizes per plumbing code. Essential for new construction, additions, or remodels. | Calculates how much a pipe will elongate or contract due to a temperature change, accounting for the thermal expansion coefficient of steel, copper, or aluminum. Essential for sizing expansion joints and loops in piping systems. |