UTELVANI
Fictional worked example

Turn a washer cycle reading into a monthly cost

A couple measures 0.42 kWh for one 70-minute wash cycle. They use the equivalent of 420 W for one hour to enter that measured energy in the calculator.

Open Calculator

Inputs and calculation

Twelve loads using the measured program
Tool inputValue
CurrencyUSD
Power unitW
Power420
Hours per day1
Days or equivalent sessions12
Duty cycle (%)100
Energy price (USD per input kWh)0.28

420 ÷ 1,000 × 1 × 12 × 100% = 5.04 kWh. 5.04 × 0.28 rounds to USD 1.41.

Tool result · USD 1.41

Twelve warmer loads at 0.65 kWh each
Tool inputValue
CurrencyUSD
Power unitW
Power650
Hours per day1
Days or equivalent sessions12
Duty cycle (%)100
Energy price (USD per input kWh)0.28

650 ÷ 1,000 × 1 × 12 × 100% = 7.8 kWh. 7.8 × 0.28 rounds to USD 2.18.

Tool result · USD 2.18

What the comparison shows

Use Days as the count of one-cycle sessions here. The warmer program adds 2.76 kWh across the twelve loads. Water and externally supplied hot water are separate.

Assumptions and limits

The one-hour input represents the measured cycle energy; it is not the cycle’s actual duration. Separate different programs when their cycle energy differs.

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