Calculate reusable vs disposable

How it works

Break-even rounds reusable price divided by disposable price per use upward. Reusable unit cost uses the smaller of expected and rated uses, while saving subtracts the reusable purchase from disposable spending over the expected count.

• Cleaning, maintenance, replacements, finance costs, and environmental effects are not included.
• Every price and lifetime assumption remains explicit rather than coming from a product category.

Worked example

											Reusable cost: 25
Reusable uses: 500
Disposable cost per use: 0.2
Expected uses: 300
										

												Break even uses: 125
Reusable cost per use: 0.0833
Disposable total: 60
Saving: 35
											

When to use this

Cafés compare cup charges, households price washable cloths against packs, and event buyers estimate whether durable containers repay their purchase.

Edge cases

• Using an item beyond its rated lifetime does not push displayed reusable unit cost below price divided by rated uses.
• Expected uses beyond rated life do not add a replacement purchase, so the saving can be overstated.
• Washing energy and consumables are absent; the result compares acquisition spending only.