Monthly Heating Gas Budget Calculator
Monthly Heating Gas Budget Calculator. Estimate costs from entered consumption. Enter your values and view the result.
Monthly Heating Gas Budget Calculator
Estimate costs from entered consumption.
Use the calculation engine below to model your exact costs with custom fuel prices, distances, and vehicle efficiencies:
Monthly Heating Gas Budget Calculator: inputs
Adjust sliders or enter exact figures
Monthly Fuel Budget
Real-Time Visual Breakdown
Comparing your expense against alternative vehicle classes
Price Fluctuation Stress Test
See how unexpected gas price surges would impact your monthly budget
How Monthly Heating Gas Budget Calculator Works
This tool works by converting entered heating consumption, measured per heating degree day (HDD), into monthly therms and costs across the heating season.
- Step 1
Enter heating consumption
Type therms used per HDD, taken from past bills divided by past HDD totals.
- Step 2
Enter base usage
Add the monthly therms for water heating and cooking, which run all year.
- Step 3
Enter monthly HDD
Use local HDD values from a weather service for each month.
- Step 4
Read the monthly budget
The calculator shows therms and cost per month and a level monthly payment for the year.
Monthly Heating Gas Budget Calculator Formula
The formula multiplies HDD by heating consumption, adds base usage, and prices the result.
Monthly Therms = (HDD × Therms per HDD) + Base Therms
Monthly Cost = Monthly Therms × All-In Rate + Fixed Charge
Level Payment = Annual Cost ÷ 12
- HDD
- = heating degree days: daily degrees below 65°F (18°C), summed for the month
- Therms per HDD
- = home-specific heating consumption
- All-In Rate
- = supply plus delivery per therm
Worked Example
- A home uses 0.15 therms per HDD and 15 base therms per month. January has 1,150 HDD.
- January therms = 1,150 × 0.15 + 15 = 187.5 therms (5,495 kWh).
- January cost = 187.5 × $1.25 + $12.50 = $246.88.
- Across the year, the level payment is $113.59 per month.
Monthly Heating Gas Budget Calculator Conversion Table
The table shows sample heating-season months for a cold climate, at 0.15 therms per HDD, 15 base therms, $1.25 per therm, and a $12.50 fixed charge.
| Month | HDD (°F) | HDD (°C) | Therms | kWh | Monthly Cost |
|---|---|---|---|---|---|
| Oct | 350 | 194 | 67.5 | 1,978 | $96.88 |
| Nov | 650 | 361 | 112.5 | 3,297 | $153.13 |
| Dec | 1,000 | 556 | 165.0 | 4,836 | $218.75 |
| Jan | 1,150 | 639 | 187.5 | 5,495 | $246.88 |
| Feb | 950 | 528 | 157.5 | 4,616 | $209.38 |
| Mar | 750 | 417 | 127.5 | 3,737 | $171.88 |
| Apr | 420 | 233 | 78.0 | 2,286 | $110.00 |
The 5 non-heating months (May to Sep) use 15 therms each and cost $31.25 per month. The annual total is $1,363.13.
What is a Monthly Heating Gas Budget Calculator?
A Monthly Heating Gas Budget Calculator is a household planning tool that estimates monthly natural gas heating costs from entered consumption.
Heating bills swing 5 to 8 times between summer and January. HDD values track how cold each month is, and a home’s therms per HDD track how much gas that home burns for each degree of cold. The Monthly Heating Gas Budget Calculator combines the 2 to forecast each month.
The level payment figure matches the budget billing plans many utilities offer, which spread the annual cost evenly across 12 months.
What are the uses of a Monthly Heating Gas Budget Calculator?
There are 4 main uses of the Monthly Heating Gas Budget Calculator, including winter budgeting, budget billing checks, and insulation decisions.
Budget for winter
Save ahead for December through February bills.
Check budget billing
Compare the utility’s level payment with your estimate.
Value insulation
Lower therms per HDD to see the saving from upgrades.
Test thermostat settings
Estimate savings from a lower winter setpoint.