Hand Drying Footprint Calculator

A hand dryer uses electricity; paper towels consume trees and energy to make and transport.

How the Math Works

The Hand Drying Footprint Calculator uses simple emission factors to compare environmental impacts. For paper towels, each sheet generates approximately 4 grams of CO2 equivalent through manufacturing, transportation, and disposal. For electric hand dryers, each 20-second use produces roughly 4 grams of CO2 (calculated by multiplying the dryer's power consumption by typical usage duration and grid emission factors). The calculator normalizes these values to per-use comparisons, allowing direct comparison between the single-use paper towel and the shared electric dryer.

Practical Applications

To use this calculator, first determine your paper towel consumption by counting sheets used per hand-drying event, then multiply by 4 g CO2 per sheet. For electric dryers, note the 20-second average usage time and apply the 4 g CO2 per use factor. You can scale these calculations based on your specific usage patterns - for example, if you use 2 sheets per wash, that's 8 g CO2 per event. Compare this to the dryer's consistent 4 g CO2 per use to evaluate which option creates lower emissions in your specific context.

Day-to-Day Use

This calculation helps you make informed choices about hand drying methods in public spaces, offices, or restaurants. By understanding the environmental cost of each option, you can advocate for more sustainable practices or adjust your personal habits accordingly. If you're choosing between facilities, you can quickly assess which offers the greener option. The calculator also helps businesses evaluate their sustainability efforts and communicate their environmental impact to customers, potentially influencing decisions about facility upgrades or policy changes.

Worked example

10 uses x 3 sheets a day is about 44 kg CO2/year for paper vs ~1.9 kg for a dryer.

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