Olympic Games Sustainability Calculator
Sustainability at a mega-event spans ecological, social, and economic questions that cannot be captured by one physical unit. This calculator treats them as a…
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Calculator Group: Sustainable Living & Resources
Plug-in Hybrid Economy Calculator
Uses the 20 published 2017 PHEV presets plus short/long trip distributions to estimate battery/gas distance, combined MPGe, monthly operating cost, savings versus a regular…
Tap Water Calculator
The price difference between tap and bottled water can be surprisingly large once a daily habit is projected across a household and a full…
Tree Benefits Calculator
Uses trunk circumference to estimate DBH and biomass, then reports modeled carbon/CO₂, oxygen, water evaporation, and energy-cost savings for eight tree types.
Water Demand Calculator
Water systems are designed for more than an average day. Utilities need to account for normal per-capita demand, an additional allowance, maximum-day conditions, and…
Books vs e-Books Calculator
The climate comparison between paper books and an e-reader depends heavily on how much the device is actually used. A device has a manufacturing…
Car vs. Bike Calculator
Estimates cycling time/life-gain equivalent, CO₂ and NOₓ avoided, tree equivalents, commute-time difference, and car costs avoided over a chosen horizon.
Cigarette Butts Cleanup Calculator
Cigarette butts are individually tiny but can dominate litter counts in heavily polluted areas. This calculator approaches the problem from a cleanup crew’s point…
Drip Faucet Calculator
A faucet that drips only a few times each minute can look harmless because each drop is tiny. Over days and weeks, however, the…
Global Plastic Policy Calculator
Applies a selected or custom plastic-policy scenario to regional waste generation and reports waste avoided and remaining.