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Heating and Cooling Calculators

Estimate air-conditioning and space-heating costs, compare system efficiency, and explore potential heat-pump savings using transparent assumptions.

3 calculators Heating and cooling comparisons User-controlled efficiency inputs
72° Indoor
Cooling Load
Heating Load
Efficiency
18 SEER
Monthly Estimate
$85.00
Heating and Cooling Calculators

Air Conditioner Running Cost Calculator

Calculate your AC running costs based on power draw or BTU and SEER ratings.

Best for: Room and central air-conditioning systems
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Heating and Cooling Calculators

Space Heater Cost Calculator

Find out how much it costs to run a space heater per day, month, and year.

Best for: Electric resistance space heaters
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Heating and Cooling Calculators

Heat Pump Savings Calculator

Calculate potential savings from upgrading to a heat pump from traditional heating sources.

Best for: Comparing heat pumps with traditional heating
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Which calculator should I use?

Cooling a single room

Use the AC Running Cost Calculator.

Supplemental winter heating

Use the Space Heater Cost Calculator.

Upgrading home heating

Use the Heat Pump Savings Calculator.

Featured Guides

Guide 7 min read

Heat Pump vs. Furnace Efficiency

Compare the efficiency and operating costs of heat pumps and traditional furnaces.
Guide 5 min read

SEER vs. EER Ratings Explained

Understand the different efficiency ratings for air conditioners and how they impact your bill.
Guide 6 min read

Saving Energy in Winter Months

Practical tips to reduce your heating costs without sacrificing comfort.
Guide 5 min read

Space Heater Safety and Efficiency

Learn how to use space heaters safely and efficiently to supplement your central heating.
HEATING & COOLING QUESTIONS

Heating & Cooling FAQs

Find answers about air-conditioner operating costs, space-heater usage, heat-pump efficiency, electricity rates, and estimated savings.

Learn how heating and cooling estimates are calculated
How do I calculate the cost to run an air conditioner?
You'll need the AC's wattage (or its cooling capacity in BTUs to estimate wattage), the number of hours it runs per day, and your electricity rate. The calculator estimates the daily and monthly cost based on continuous running time, though actual costs may vary depending on the thermostat cycling.
What is a heat pump, and how does it differ from resistance heating?
A heat pump is an energy-efficient system that provides both heating and cooling. Instead of generating heat directly like a furnace, it transfers heat from the outside air (even in cold weather) into your home, making it much more efficient.
How much can I save with a heat pump?
Savings depend on your current heating system, local climate, and energy prices. Homeowners switching from electric resistance heating or oil furnaces often see significant savings, while those switching from cheap natural gas may see smaller financial savings but improve their home's carbon footprint.
What does SEER mean?
SEER stands for Seasonal Energy Efficiency Ratio. It measures the cooling efficiency of air conditioners and heat pumps over an entire cooling season. A higher SEER rating indicates better energy efficiency and lower operating costs.
Looking for a question that is not covered here? Contact DataWisdom.

Transparent calculations and user-controlled assumptions

Formulas are shown clearly
Inputs remain user-controlled
Results are estimates, not guarantees
Limitations are explained on each calculator page

Learn more about our Methodology.