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Reusable vs Disposable Calculator

Compare the total cost and environmental impact of switching from disposable to reusable items over time.

Choose an Item

Customize Inputs

Reusable Item
Disposable Item

How It Works

Cost Model
  • Reusable total: (upfront cost / lifespan * years) + (maintenance cost * years). Replacement purchases are prorated over the analysis period.
  • Disposable total: cost per unit * units per year * years.
  • Break-even: the month at which cumulative reusable cost falls below cumulative disposable cost.
Environmental Model
  • Reusable CO2: (upfront CO2 / lifespan * years) prorated over replacements. CO2 to produce is amortized across its entire lifespan.
  • Disposable CO2: CO2 per unit (g) * total units / 1000 kg.
  • Waste: weight per unit (g) * total units / 1000 kg.
  • Tree equivalent: 1 tree absorbs roughly 21 kg CO2 per year; shown as CO2 avoided divided by 21.
Default values are representative averages. Actual figures vary by brand, usage habits, and local waste systems. Use custom inputs for precise estimates.

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