Mask Calculator

Estimate how many days a box of masks lasts.

Box lasts (days) 50

Formula: days = masks ÷ masks per day

Step-by-step with your numbers:

1. Values used:

2. Masks in the box = 50

3. Disposable masks per day = 1

5. Box lasts = Masks in the box x Disposable masks per day = 50 x 1 = 50days

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How long a box of disposable masks will last.

The math behind it

days = box quantity ÷ masks used per day.

50 masks at 1/day → 50 days.

Reusable?

A reusable cloth mask saves far more over time.