Updated · Methodology: named formula library
Laundry Cost Calculator
Calculate the cost per load of laundry at home vs laundromat.
Running a 100W appliance 4 hours/day costs approximately $2/month at $0.13/kWh.
Why This Calculation Matters
The Laundry Cost Calculator answers a common everyday math question in seconds, no spreadsheet, no mental arithmetic, no sticky notes.
How to Use This Calculator
- Enter your values in the input fields, each one has a label and help text explaining what to type.
- Results appear instantly as you type; there's no "calculate" button to press.
- Change any input to compare scenarios side by side.
All math happens in your browser. Nothing you type is sent to a server, saved, or shared.
How to Use the Laundry Cost Calculator
Enter the required values in the input fields on the left. Results update instantly on the right as you adjust your inputs.
Understanding Your Results
Review each output value and its description to understand how your inputs affect the outcome. Adjust values to compare different scenarios.
Tips
- All calculations happen in your browser, your data is never stored
- Bookmark this page for quick access
- Try different values to see how results change
Formula
Cost = kWh × rate. kWh = watts × hours ÷ 1000. National average U.S. residential rate is ~$0.16/kWh (2025), but ranges from ~$0.11 (WA) to ~$0.44 (HI).
Worked Example
100W device, 4 hr/day, 30 days, $0.13/kWh
- watts
- 100
- hoursPerDay
- 4
- days
- 30
- rate
- 0.13
- Result
- $1.56/month
100W × 4hr × 30 / 1000 = 12 kWh × 0.13 = $1.56.
When to Use This Calculator
- Answer a quick "how much / how many" question without pulling out a spreadsheet.
- Sanity-check a bill, a quote, or a receipt in seconds.
- Compare options side by side before committing.
Limitations & Common Mistakes
- Results are estimates, real-world outcomes depend on factors not captured in a simplified calculation.
- Always verify critical numbers against an authoritative source or domain expert before acting on them.
Frequently Asked Questions
How does the Laundry Cost Calculator work?
Enter your wattage (w) (default: 100) and any other inputs; the calculator instantly applies its electricity cost formula and shows the result with details. All math runs in your browser; nothing is sent to a server.
Is the Laundry Cost Calculator accurate for home decisions?
It uses standard, documented formulas that match published references. For high-stakes home decisions, verify the result against an authoritative source (industry calculator, professional advisor, or government data). The calculator is a planning estimate, not a substitute for professional judgment.
What inputs does the Laundry Cost Calculator require?
3 inputs: Wattage (W), Hours Per Day, Rate ($/kWh). Each has a sensible default; replace with your own values to get a result tailored to your situation.
Can I bookmark or share the Laundry Cost Calculator?
Yes — the URL is stable: https://www.calcintel.com/calculator/laundry-cost. Inputs reset to defaults on each visit (no input is stored), so screenshot or copy the result if you want to preserve a specific scenario.
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Source: BLS Consumer Price Index, 2026.