Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Plumbing
Pipe Friction Loss Calculator
Calculates pressure loss (in PSI) due to pipe friction using the Hazen-Williams equation, given flow rate, pipe length, diameter, and material. Ideal for plumbers and engineers sizing water supply lines.
Fill in the required fields to see your result.
Plumbing
Drainage Pipe Slope Calculator
Calculates the required slope and total vertical fall of a drainage pipe to achieve self-cleaning sewage flow over a given horizontal distance. Essential for plumbers designing gravity-fed drain systems.
Fill in the required fields to see your result.
Key differences
| Pipe Friction Loss Calculator | Drainage Pipe Slope Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 4 | 4 |
| Result | Pressure Loss (PSI) | Required Fall (inches) |
| What it does | Calculates pressure loss (in PSI) due to pipe friction using the Hazen-Williams equation, given flow rate, pipe length, diameter, and material. Ideal for plumbers and engineers sizing water supply lines. | Calculates the required slope and total vertical fall of a drainage pipe to achieve self-cleaning sewage flow over a given horizontal distance. Essential for plumbers designing gravity-fed drain systems. |