How the closet pack count is worked out
Moisture and moth packs sold for closets print the volume one pack covers on the packaging, usually as a figure in cubic feet. This tool measures the closet from its inside width, depth and height, then divides that volume by the coverage figure you type in and rounds the count up. Add the date you first placed them and your own replacement interval, and it also returns the replacement date and the time left from the reference date.
How the math runs
Volume comes from the inside dimensions with the door closed, converted to cubic feet and snapped to one decimal before the division. The formula used appears on screen, so it is clear where the rounding up happened. Dates are built from year, month and day components separately, so month ends and leap years do not drift. Figures are current as of October 2026.
Limits and disclaimer
No officially recommended coverage volume or replacement interval is offered here, and no authoritative humidity range for clothes storage has been confirmed. Figures in this area are widely repeated but are common practice rather than a published standard. Take both numbers from the packaging. Follow the product sheet and the manufacturer's guidance first, and note that shelves and garments are not deducted from the volume.
Frequently asked questions
It uses the volume one pack covers exactly as printed on the packaging and works the count out from that figure. No officially recommended coverage figure is offered here.
No authoritative source has been confirmed for an indoor humidity range suited to storing clothes. Humidity ranges are therefore left out, and only volume, pack count and dates are worked out.
It is the inside space with the door closed, measured across the width, the depth and the height and multiplied together. Space taken up by shelves and clothes is not deducted.