Tools in This Collection
Carbon Footprint Calculator
Estimate annual CO2 emissions from transport, energy, and lifestyle
Energy Reducer Calculator
See how LED bulbs, smart thermostats, and appliance upgrades cut your bill
Food Waste Calculator
Quantify the cost and impact of household food waste
Time-of-Use Rate Calculator
Save 30-50% by shifting appliances to off-peak hours
UK Energy Bill Calculator
Estimate UK household electricity and gas costs
Generator Runtime Calculator
Estimate how long your generator runs on propane or gasoline
Home Energy Management Tools
Understanding your household's environmental impact starts with putting numbers to your daily choices. The average US household emits about 16 metric tons of CO2 per year — from driving, home heating, electricity, and food. These tools help you measure your impact and identify where changes will have the most effect.
Calculate Your Carbon Footprint
The Carbon Footprint Calculator tallies annual CO2 emissions across transportation, home energy, diet, and purchasing. Most people are surprised by the relative weight of each category — a single cross-country flight can equal months of driving. Use it as a baseline, then identify which category to tackle first.
Reduce Energy Costs
The Energy Reducer Calculator shows exactly how targeted changes affect your monthly electricity bill. Switching 30 incandescent bulbs to LEDs saves about $75/year. A smart thermostat adjustment of 2°F saves another 5-8% on heating costs. These stack — and the calculator adds them up.
Households on variable-rate electricity plans can save 30-50% by shifting high-draw appliances (dishwasher, laundry) to off-peak hours (typically 9pm-7am). The Time-of-Use Rate Calculator shows the cost difference for your specific rate schedule.
Food Waste and Generator Tools
The Food Waste Calculator quantifies the dollar and environmental cost of food thrown away — the average US household wastes about $1,500 of food per year. The Generator Runtime Calculator estimates how long a portable generator runs on a given fuel load: propane generates roughly 2 hours per gallon at half load, gasoline about 1.5 hours per gallon.
Frequently Asked Questions
What is the average US household carbon footprint?
The average US household emits about 16 metric tons of CO2 equivalent per year. This includes transportation, home energy (electricity and gas), diet, and purchases. The global average is about 4 tons per person — about one-quarter the US figure.
How much can time-of-use electricity rates save me?
Shifting high-draw appliances like dishwashers, laundry, and EV charging to off-peak hours (typically 9pm-7am) can save 30-50% on those loads. The savings depend on your utility's peak versus off-peak rate differential, which the Time-of-Use Calculator handles automatically.
How long does a generator run on one tank of fuel?
It depends on the fuel type and load. A propane generator produces about 2 hours per gallon at half load. A gasoline generator produces about 1.5 hours per gallon at half load. Reducing the load (running fewer appliances) significantly extends runtime. The Generator Runtime Calculator gives estimates for any fuel and load combination.