Utility Bill Splitter & Estimator
Split household bills fairly using tiered pricing logic. Supports progressive rates for electricity, water, and gas.
Rate Structure
About
Sharing a living space requires transparent financial agreements, especially regarding utilities. This tool helps roommates and tenants accurately estimate and split the cost of electricity, gas, and water based on meter readings. Unlike simple splitters that just divide the total by the number of people, this estimator applies "Tiered Pricing" logic found in most modern energy contracts.
Tiered pricing means the first block of energy is cheaper than the subsequent blocks. For example, the first 100 kWh might cost $0.10, but everything above that costs $0.15. This calculator accurately computes the weighted average cost before splitting it among roommates. It eliminates arguments by providing a clear, math-based breakdown of the total owed.
Formulas
The Total Cost C is calculated using a piecewise function based on usage u and the Tier Limit L.
The Split Amount S per person is simply the Total Cost divided by the number of people N.
Reference Data
| Utility | Unit | Avg Base Rate $ | Avg Tier 2 Rate $ | Tier Threshold |
|---|---|---|---|---|
| Electricity | kWh | 0.12 | 0.18 | > 500 kWh |
| Natural Gas | Therm | 1.10 | 1.45 | > 50 Therms |
| Water | m3 | 1.50 | 2.20 | > 15 m3 |
| Internet | Month | 50.00 | N/A | Flat Rate |
| Trash | Month | 25.00 | N/A | Flat Rate |
| Sewer | HCF | 4.50 | 5.10 | > 10 HCF |