Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Plumbing
Toilet Flush Volume Calculator
Computes the volume of water used per flush by measuring the internal dimensions of the toilet tank. Ideal for identifying water-wasting fixtures, calculating household water consumption, or qualifying for rebate programs.
Fill in the required fields to see your result.
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.
Key differences
| Toilet Flush Volume Calculator | Water Heater Sizing Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 3 | 5 |
| Result | Flush Volume (gallons) | Recommended Tank Size (gallons) |
| What it does | Computes the volume of water used per flush by measuring the internal dimensions of the toilet tank. Ideal for identifying water-wasting fixtures, calculating household water consumption, or qualifying for rebate programs. | 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. |