Series MI-13 · 34 instruments catalogued
Ecology
Footprints and flows for the world outside the window.
In Service
31 built and verifiedAI Water Footprint Calculator
Estimate how much freshwater your AI chatbot habit consumes, based on a published per-query water range from a peer-reviewed data-center study.
In service MI-13-002Bag Footprint Calculator
Find out how many single-use plastic bags your reusable bag has actually offset, based on the UK Environment Agency's life-cycle reuse thresholds.
In service MI-13-003Books vs e-Books Calculator
Find out how many paper books you'd need to read to make an e-reader's higher manufacturing footprint pay off, using a widely-cited 2009 life-cycle study.
In service MI-13-004Car vs. Bike Calculator
Compare the full life-cycle CO2 of driving versus cycling the same trips, using European Cyclists' Federation figures, and see your annual savings.
In service MI-13-005Carrying Capacity Calculator
Enter a population's growth rate, current size and carrying capacity to find its instantaneous growth rate under the standard logistic (Verhulst) model.
In service MI-13-006Christmas Tree Footprint Calculator
Find the break-even point where reusing an artificial Christmas tree beats buying a fresh real tree every year, using published life-cycle carbon figures.
In service MI-13-007Cigarette Butts Cleanup Calculator
Turn a cigarette butt cleanup count into the volume it fills and how much water its leachate could render toxic to fish, per published references.
In service MI-13-009CO₂ Breathing Emission Calculator
Find out how much CO2 you and others exhale over any period, using published human-metabolism averages — short-cycle biogenic carbon, not fossil pollution.
In service MI-13-010Cryptocurrency Footprint Calculator
An educational calculator that derives Bitcoin's energy cost per transaction from network energy and transaction count you supply — not a live data feed.
In service MI-13-011Drip Faucet Calculator
Turn a dripping faucet's rate into the gallons and litres it wastes per year, based on the EPA WaterSense reference figure for a leaking tap.
In service MI-13-012Fish Mercury Calculator
Estimate how much mercury a fish serving contains and its share of your weekly safe limit, based on a peer-reviewed seafood mercury survey and EPA/FDA guidance.
In service MI-13-013Flight Carbon Footprint Calculator
Estimate a flight's carbon footprint from distance and cabin class, using the UK Government's 2026 DESNZ passenger-km emission factors.
In service MI-13-015Hand Drying Footprint Calculator
Compare the annual CO2e footprint of paper towels versus an electric hand dryer, based on an MIT life-cycle assessment and your local grid intensity.
In service MI-13-016Hydroelectric Power Calculator
Enter water flow rate, head height and efficiency to estimate the electrical power output of a hydroelectric installation, from micro-hydro to utility scale.
In service MI-13-017Kaya Identity Calculator
Break total CO2 emissions into population, GDP per capita, energy intensity and carbon intensity using the Kaya identity decomposition.
In service MI-13-018Lotka-Volterra Calculator
Evaluate the classical Lotka-Volterra predator-prey ODE system at a population snapshot to find the instantaneous rates of change for prey and predators.
In service MI-13-019Meat Footprint Calculator
Compare beef, lamb, chicken, tofu and more by carbon footprint per 100 g of protein delivered, using the Poore & Nemecek food-emissions dataset.
In service MI-13-020Olympic Games Sustainability Calculator
Score an Olympic Games edition across nine ecological, social, and economic criteria using the composite-index methodology from a Nature Sustainability study.
In service MI-13-021Passive House Savings Calculator
Estimate the annual heating energy and cost savings of building to the Passive House standard, and the payback period on the extra construction cost.
In service MI-13-022Plastic Footprint Calculator
Total up how many kilograms of single-use plastic you go through in a year from bottles and bags, using disclosed order-of-magnitude per-item weight estimates.
In service MI-13-023Plug-in Hybrid Economy Calculator
Enter your electric and gas driving split, prices and efficiency to get a plug-in hybrid's true blended cost per mile, combining both power sources honestly.
In service MI-13-024Reduce Your Plastic Calculator
See how many kilograms of single-use plastic you'd save per year by cutting one item — bottles, bags, or straws — from a current rate down to a goal.
In service MI-13-025Shannon Diversity Index Calculator
Paste the relative abundance of each species in a community to get the Shannon diversity index (H′), the standard measure of biodiversity in ecology.
In service MI-13-027Solar Panel Calculator
Enter panel area, sunlight intensity, cell efficiency and system performance ratio to estimate the real-world power output of a solar array.
In service MI-13-028Solar Panel Wattage Calculator
Enter your daily energy use, local peak sun hours and system efficiency to find the solar array wattage needed to meet that demand off-grid.
In service MI-13-029Tap Water Calculator
Estimate the gallons a WaterSense-labeled showerhead, faucet or toilet saves each year versus a standard fixture, based on EPA WaterSense flow rates.
In service MI-13-030Tree Benefits Calculator
Estimate CO2 absorbed by urban trees or forest acreage over time, using two distinct EPA equivalency figures that are never combined into one number.
In service MI-13-031Vegan Footprint Calculator
Calculate the CO2e saved by following a vegan diet instead of a meat-eating, fish-eating, or vegetarian baseline, using a peer-reviewed dietary emissions study.
In service MI-13-032Water Demand Calculator
Calculate Average Daily, Maximum Daily, and Peak Hour water demand for a population using the standard municipal water-engineering design formula.
In service MI-13-033Wind Turbine Calculator
Enter air density, rotor swept area, wind speed and power coefficient to estimate a wind turbine's electrical power output at that wind speed.
In service MI-13-034Wind Turbine Profit Calculator
Enter annual energy generated, sale price per kWh and operating costs to find a wind turbine's annual profit, the bottom-line economics behind the physics.
In serviceOn the Board
3 catalogued · not yet builtThese sheets are numbered and queued. They are listed for transparency about what this series will contain — they are not links yet, because nothing here ships before its formula is verified twice.
- MI-13-008 COVID-19 Waste Calculator
- MI-13-014 Global Plastic Policy Calculator
- MI-13-026 Smog Calculator