Engineering Tools
AC Electricity Cost Estimator
Enter the rated power consumption of your AC unit, daily usage hours, and monthly usage days to instantly estimate AC electricity costs based on Taiwan Power Company rates. Suitable for planning reference for residential, office, and commercial spaces.
Electricity Cost Estimation
Estimation Results
Note: Taiwan Power Company uses a tiered rate structure (higher usage means higher unit price). This tool uses a flat rate for simplified estimation, so actual electricity bills may be higher.
Calculation Method
This tool uses the following formulas for simplified estimation:
Step 1: Daily Energy ConsumptionDaily Energy (kWh) = Rated Power (kW) x Daily Usage Hours (hr)
Step 2: Monthly Energy ConsumptionMonthly Energy (kWh) = Daily Energy x Monthly Usage Days
Step 3: Monthly Electricity CostMonthly Cost (TWD) = Monthly Energy x Unit Rate (TWD/kWh)
Step 4: Yearly Electricity CostYearly Cost (TWD) = Monthly Cost x 12
Note: This tool estimates based on rated power, which is suitable for fixed-speed AC units. Inverter AC units reduce compressor speed after reaching the set temperature, with actual average power being approximately 60~80% of rated value, so actual costs are typically lower than estimated. Taiwan Power Company residential rates use a tiered structure (progressive pricing), where higher usage results in higher unit prices. Therefore, these results are for preliminary reference only.
Frequently Asked Questions
How much does air conditioning cost per month on average?
For example, a 1.2 kW (approx. 1 ton) inverter AC unit running 8 hours per day at an electricity rate of TWD 4.71/kWh would cost roughly TWD 1,360 per month. Actual costs vary depending on the unit's efficiency, usage habits, and the tiered electricity rate structure.
Do inverter air conditioners really save more electricity?
Yes. Once an inverter AC reaches the set temperature, it reduces compressor speed rather than repeatedly starting and stopping. Over extended operation, this can save 30~50% on electricity. This tool estimates based on rated power; the actual average power of inverter units is typically lower than the rated value.
When does the summer electricity rate apply in Taiwan?
Taiwan Power Company's summer rate period runs from June 1 to September 30 each year (4 months). Summer rates are approximately 30~40% higher than non-summer rates, making it the most expensive period for AC electricity costs.
Professional Consultation
Need Professional HVAC Engineering?
Online tools provide preliminary estimates for reference. Actual engineering design requires consideration of many additional professional factors. Contact our engineering team for precise HVAC system planning.