Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Plumbing
Water Heater Sizing Calculator
Determines the minimum tank capacity (in gallons) your household needs based on occupants, bedrooms, bathrooms, usage pattern, and heater efficiency. Use it before buying or replacing a water heater.
Fill in the required fields to see your result.
Plumbing
Water Pressure Loss Calculator
Calculates friction-induced pressure drop along a water pipe using the Hazen-Williams equation. Use it when designing irrigation systems, fire suppression lines, or building water supply networks where adequate pressure at the endpoint matters.
Fill in the required fields to see your result.
Key differences
| Water Heater Sizing Calculator | Water Pressure Loss Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 5 | 3 |
| Result | Recommended Tank Size (gallons) | Pressure Loss (PSI) |
| What it does | Determines the minimum tank capacity (in gallons) your household needs based on occupants, bedrooms, bathrooms, usage pattern, and heater efficiency. Use it before buying or replacing a water heater. | Calculates friction-induced pressure drop along a water pipe using the Hazen-Williams equation. Use it when designing irrigation systems, fire suppression lines, or building water supply networks where adequate pressure at the endpoint matters. |