Everyday hand drying footprint problems come down to one relationship between hand drying frequency (customers), customers, towels used, towels used (customers), towels used (staff), towels used, towels used (customers), towels used (staff), number of staff, hand drying frequency (staff), time per dry, time per dry (customers), time per dry (staff), times per dry, time per dry (customer), time per dry (staff), time per dry, time per dry (customers), time per dry (staff), how many times are you washing your hands?, workdays in a year, carbon footprint and carbon footprint 😀. This calculator turns those numbers into carbon footprint, trees needed to absorb it and total towels per year, with the working shown so you can check the result rather than simply trust it.
What Is the Hand Drying Footprint Calculator?
The hand drying footprint calculator works out carbon footprint, trees needed to absorb it and total towels per year from hand drying frequency (customers), customers, towels used, towels used (customers), towels used (staff), towels used, towels used (customers), towels used (staff), number of staff, hand drying frequency (staff), time per dry, time per dry (customers), time per dry (staff), times per dry, time per dry (customer), time per dry (staff), time per dry, time per dry (customers), time per dry (staff), how many times are you washing your hands?, workdays in a year, carbon footprint and carbon footprint 😀.
Biological relationships are usually approximations rather than exact laws, so the output is best treated as an estimate with a sensible range around it.
How the Hand Drying Footprint Calculation Works
The calculation applies the relationship as published, step by step, so each intermediate value can be checked against the underlying theory.
Keep the units consistent throughout. Mixing a percentage with a proportion is the single most common source of an answer that is out by a factor of a hundred.
Assumptions Worth Knowing
Any relationship used here assumes a constant rate, a representative sample, or a stable population. Real populations rarely meet those conditions for long, so treat the answer as a guide.
Where the inputs are field measurements, a single misread value can shift the result noticeably. Measure carefully and record what you used.
A Worked Example
Working through an example, with hand drying frequency (customers) set to 10, customers set to 5, towels used set to 2, the calculator returns total towels per day of 5,100, and total towels per year of 51,000, and trees saved (from logging for paper towels) of 2.04. Substitute your own figures and the same steps produce the same kind of answer.
Frequently Asked Questions
What do I need to work out carbon footprint?
Enter hand drying frequency (customers), customers, towels used, towels used (customers), towels used (staff), towels used, towels used (customers), towels used (staff), number of staff, hand drying frequency (staff), time per dry, time per dry (customers), time per dry (staff), times per dry, time per dry (customer), time per dry (staff), time per dry, time per dry (customers), time per dry (staff), how many times are you washing your hands?, workdays in a year, carbon footprint and carbon footprint 😀. The calculator then works through the relationship and reports carbon footprint, trees needed to absorb it and total towels per year.
What does the hand drying footprint actually calculate?
It takes hand drying frequency (customers), customers, towels used, towels used (customers), towels used (staff), towels used, towels used (customers), towels used (staff), number of staff, hand drying frequency (staff), time per dry, time per dry (customers), time per dry (staff), times per dry, time per dry (customer), time per dry (staff), time per dry, time per dry (customers), time per dry (staff), how many times are you washing your hands?, workdays in a year, carbon footprint and carbon footprint 😀 and converts them into carbon footprint, trees needed to absorb it and total towels per year using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter hand drying frequency (customers)?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Why does a small change in one value move the answer so much?
That happens when an output depends on a ratio, because dividing by a small number magnifies any change in it. Check the units first, then check whether the value you entered is in the range the relationship was designed for.
Can I use this for a quick estimate as well as a precise answer?
Yes. The calculator is built for quick checks, so round your inputs to a sensible number of significant figures and the result will be just as useful. If you need more precision, keep the same method and add digits to the inputs rather than adjusting the method itself.