Ecology & Environment

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Hand Dryers vs. Paper Towels Calculator.

Compare use-phase dryer emissions with paper-towel lifecycle emissions using explicit factors.

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Results update as you type.

Results update automatically as you type.

How to Use

Scenario arithmetic only: every lifecycle or resource factor is entered explicitly; no regional defaults are used.

Use Cases

Make an informed purchasing decision

When choosing between installing hand dryers or stocking paper towels, use this calculator to evaluate the emissions impact based on your specific energy source and paper product lifecycle.

Example: Compare a high-efficiency dryer (0.01 kWh/use) with recycled paper towels (lifecycle factor 1.0 kg CO₂e/kg).

Frequently Asked Questions

How does the calculator compare hand dryers and paper towels?
You input the number of hand-drying uses, dryer energy per use (kWh), electricity factor (kg CO₂e/kWh), towels per use, mass per towel (g), and paper lifecycle factor (kg CO₂e/kg). The calculator estimates total emissions for each method and shows which has lower emissions.
What is the electricity factor?
The electricity factor (kg CO₂e/kWh) represents the carbon dioxide equivalent emissions per kilowatt-hour of electricity, which varies by region and energy mix. It is used to convert dryer energy consumption into emissions.
What does the paper lifecycle factor include?
The paper lifecycle factor (kg CO₂e/kg) accounts for emissions from raw material extraction, manufacturing, transportation, and disposal of paper towels. It is multiplied by the total mass of towels used to estimate paper towel emissions.

Tips & Common Mistakes

Tips

  • Use realistic values for dryer energy per use (typically 0.01–0.05 kWh) and electricity factor (check your local grid).
  • For paper towels, consider the actual mass per towel (often 3–10 g) and lifecycle factor (varies by recycled vs. virgin pulp).
  • Run multiple scenarios with different inputs to see how sensitive the comparison is to changes in energy and paper factors.
  • Remember that this calculator focuses on carbon emissions; other environmental impacts like water use or waste may also influence your decision.

Common Mistakes to Avoid

  • Using the same electricity factor for all regions without checking local grid emissions.
  • Forgetting to convert towel mass from grams to kilograms when using the lifecycle factor (kg CO₂e/kg).
  • Assuming all paper towels have the same lifecycle factor; recycled paper often has lower emissions than virgin paper.

Last updated: August 13, 2026