Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Plumbing
Plumbing Fixture Unit Calculator
Calculates total plumbing fixture units (FU) for a building by summing standardized load values for toilets, sinks, showers, and tubs. Use it to size drain, waste, and vent (DWV) or water supply piping per code.
Fill in the required fields to see your result.
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.
Key differences
| Plumbing Fixture Unit Calculator | Plumbing Fixture Unit Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 4 | 5 |
| Result | Total Fixture Units (FU) | Total Fixture Units (FU) |
| What it does | Calculates total plumbing fixture units (FU) for a building by summing standardized load values for toilets, sinks, showers, and tubs. Use it to size drain, waste, and vent (DWV) or water supply piping per code. | 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. |