See where your bill drops each month fast. Adjust rates, usage, and upgrades in seconds. Save smarter with totals, charts, downloads, and guidance included.
| Scenario | Electricity (kWh, rate) | Gas (therms, rate) | Water (gal, rate) | Reductions | Baseline bill | New bill | Monthly savings |
|---|---|---|---|---|---|---|---|
| Apartment efficiency tune-up | 380 @ 0.16 | 22 @ 1.25 | 1800 @ 0.006 | Elec 10%, Gas 6%, Water 5% | $118.40 | $108.50 | $9.90 |
| Family home upgrades | 720 @ 0.18 | 55 @ 1.40 | 3200 @ 0.007 | Elec 15%, Gas 10%, Water 8% | $258.70 | $228.10 | $30.60 |
| Water-focused savings | 410 @ 0.17 | 28 @ 1.30 | 5000 @ 0.007 | Elec 5%, Gas 5%, Water 20% | $171.60 | $152.30 | $19.30 |
Utilities often behave like subscriptions plus usage charges. This calculator separates variable usage from fixed fees so you can see what efficiency changes can actually influence. For example, reducing 450 kWh by 12% lowers only the energy portion, not the fixed connection charge. That distinction prevents overestimating savings. Use recent bills to reflect seasonality accurately.
A small rate difference can outweigh a large usage change. If electricity is 0.17 per kWh, a 50 kWh reduction saves 8.50 before surcharges and tax. Add a 5% surcharge and 10% tax and the same reduction becomes about 9.82. Entering your bill’s extras makes comparisons realistic. If rates are tiered, use a blended rate from your bill.
When you enter an upgrade cost, the tool estimates simple payback using gross monthly savings. If you amortize the cost across months, it also shows net savings after that monthly allocation. This helps compare options like insulation, efficient lighting, or leak fixes using the same monthly lens. For gas users, even a 3 to 8 therm reduction can matter when winter rates spike.
Try conservative, expected, and aggressive reductions for each utility. A water‑focused scenario might cut 20% of 5,000 gallons, while energy efforts may deliver 5% to 15% depending on behavior and equipment. Save outputs as CSV to track scenarios and share them with stakeholders. Keep one scenario with zero reductions as a baseline for rate‑increase planning.
Prioritize changes with high savings and short payback. Next, revisit inputs quarterly because usage and rates drift. The chart highlights which utility drives your savings, guiding where to measure progress. Pair the estimate with actual meter readings to confirm that savings persist over time. If you enter emission factors, you also get avoided CO₂, useful for sustainability reporting.
Use a blended rate. Divide the billed energy charge by total usage for the month, then enter that average rate. Keep fixed customer charges in the fixed fields so savings aren’t overstated.
No. The reduction percentages apply only to usage-based portions. Fixed monthly charges and other fees remain unchanged unless your provider specifically reduces them.
Start with small ranges. Behavior changes may save 3%–8%, while equipment upgrades can reach 10%–20%. Compare against past months to avoid using an unusually low or high period.
If you add an upgrade cost and amortize it across months, the calculator subtracts that monthly allocation from savings. This helps you judge affordability while still tracking payback.
Yes. Enter each utility’s usage, rate, and fixed charge. If a utility isn’t applicable, set its usage and fixed charge to zero so totals remain accurate.
They are estimates based on the emission factors you provide. Update factors for your region or supplier mix. Use the avoided CO₂ figure to compare scenarios and support sustainability reporting.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.