Hand Sanitizer Calculator
Estimate hand sanitizer volume and bottle count for your household based on people, days, outdoor time, and usage frequency.
How Much Hand Sanitizer Do You Need?
This calculator estimates total hand sanitizer volume and the number of bottles to buy for your household. It follows CDC guidance of at least 3 ml (0.1 fl oz) per application. Uses per day depend on how often you leave home and how frequently you sanitize. Compare with the COVID-19 Waste Calculator when planning hand-washing supplies.
Formula and Assumptions
Uses per person per day equals outdoor base × usage multiplier. Outdoor bases are 2 (self-isolating), 5 (out a few times weekly), or 10 (daily outings). Usage multipliers are 0.75 (small), 1 (moderate), or 1.75 (extreme). Total volume equals people × days × uses per day × 3 ml. Bottles needed equals total ml divided by bottle size, rounded up.
When to Use Hand Sanitizer
Use alcohol-based sanitizer with at least 60% alcohol when soap and water are unavailable. Apply enough product to cover all hand surfaces and rub for at least 30 seconds. Sanitizer is not a substitute for hand washing after using the toilet or when hands are visibly dirty or greasy.
Frequently Asked Questions
How much sanitizer per use does the CDC recommend?
The CDC recommends at least 3 ml (about 0.1 fl oz) per application — more than half a teaspoon.
What bottle sizes are supported?
Presets range from 1 fl oz (29.6 ml) to 68 fl oz (2 L). You can also enter a custom bottle size in milliliters.
How is outdoor time factored in?
Self-isolating households use a base of 2 applications per day. Going out a few times a week uses 5. Daily outings use 10.
Should babies be included in the people count?
Exclude infants under age 2. Their skin should not contact alcohol-based sanitizers routinely.
Does the result include fluid ounces?
Yes. Total volume is shown in both milliliters and US fluid ounces (1 fl oz ≈ 29.57 ml).
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