The reading behind the result

Make sense of your energy costs.

Understand the rate on your bill, choose better calculator inputs, and see what a change in your routine could save.

Real decisions. Transparent examples.

Each guide separates illustrative numbers from official information and links to a calculator you can use with your own inputs.

Understand your bill

How to Find Your Electricity Rate on Your Bill

Find the right cents-per-kWh rate for an appliance calculator. Separate supply, delivery, fixed fees, and time-of-use charges with a worked bill example.

6 min read · Worked examples Heating costs

How Much Does a 1,500-Watt Space Heater Cost to Run?

See hourly and monthly costs for a 1,500W heater at three example rates, how thermostat cycling changes the math, and when shorter use saves money.

5 min read · Worked examples Appliance decisions

Will Replacing Your Old Refrigerator Actually Save Money?

Use annual EnergyGuide kWh and measured old-fridge energy to estimate refrigerator savings, compare local rates, and calculate a simple replacement payback.

6 min read · Worked examples EV charging

EV Charging Costs: Battery kWh vs. What Your Home Meter Sees

Estimate home EV charging costs without counting losses twice. Learn when to use wall kWh, battery kWh, EPA efficiency, and separate off-peak rates.

5 min read · Worked examples Humidity & comfort

What Does It Cost to Run a Dehumidifier 24 Hours a Day?

Compare 24-hour dehumidifier cost scenarios, distinguish compressor runtime from time plugged in, and turn measured daily kWh into a seasonal budget.

5 min read · Worked examples Energy basics

Watts to kWh: Calculate Energy Use and Electricity Cost

Convert watts, kilowatts, and minutes into kWh with worked examples. Learn why a wattage alone cannot tell you monthly electricity use.

4 min read · Worked examples Understand your bill

Why Is My Electric Bill So High? Compare Days, kWh and Rates

Use a practical bill comparison to separate extra billing days, higher daily energy use, rate changes, and fixed fees before blaming one appliance.

5 min read · Worked examples Rates & savings

Is Time-of-Use Electricity Worth It? Find Your Break-Even Point

Compare peak and off-peak electricity rates with a flat plan, including fixed fees, energy shifting, and the peak-use share where costs break even.

5 min read · Worked examples Cooling costs

Fan vs Air Conditioner Electricity Cost: Compare Watts and Runtime

Compare a fan and air conditioner using explicit wattage, runtime, and cycling assumptions. Understand why lower electricity cost is not equal cooling.

4 min read · Worked examples Kitchen costs

Air Fryer vs Oven Running Cost: Compare the Whole Meal

Compare air fryer and electric oven costs using complete-session kWh, preheating, thermostat activity, and the number of batches needed.

4 min read · Worked examples Kitchen costs

How Much Does It Cost to Run a Dishwasher per Cycle?

Calculate dishwasher cost per wash from kWh, then account for cycle selection, drying, hot-water boundaries, and your monthly number of loads.

4 min read · Worked examples Outdoor equipment

Pool Pump Electricity Cost: Add Up Each Speed and Schedule

Estimate a pool pump’s monthly cost from input watts and hours at each speed. Understand why horsepower and a generic runtime are not enough.

4 min read · Worked examples Energy basics

Standby Power Cost: Calculate the Electricity Used While Idle

Estimate standby and idle electricity costs from measured watts, then avoid counting operating hours twice or confusing capacity with power draw.

4 min read · Worked examples