Sustainability Calculators 2026 - Carbon, ESG, Repair vs Replace
Popular Sustainability Calculators
What makes the sustainability category useful
This category groups calculators that solve closely related real-world tasks, so you can move from a quick estimate to a more specific planning tool without restarting the process.
Estimate personal annual carbon footprint from travel, energy, diet, and shopping habits
Score ESG performance against environmental, social, and governance benchmarks
Compare total cost of ownership (TCO) across new, refurbished, and circular alternatives
Decide whether to repair, refurbish, or replace electronics and appliances
See the CO2 equivalent and dollar impact for each scenario side by side
Personal climate action
Estimate your annual CO2 footprint and identify the highest-impact changes you can make.
Procurement and TCO
Compare circular total cost of ownership for IT and equipment refresh decisions.
Repair vs replace choices
Decide between fixing an existing item or buying new based on cost and CO2 footprint.
All Sustainability Calculators
Carbon Footprint Calculator
Estimate your annual CO2 emissions and environmental impact.
ESG Score Calculator
Assess your Environmental, Social, and Governance (ESG) impact.
Circular TCO Calculator
Compare Linear vs Circular total cost and find your payback period.
Repair vs Replace Calculator
See whether repairing or replacing is cheaper per year of use.
Solar Payback Calculator
Find your exact solar payback period and 25-year ROI.
EV Total Cost of Ownership Calculator
Compare EV vs gas TCO with fuel, maintenance, and residual.
Heat Pump Payback Calculator
Find heat pump payback after federal credit and rebates.
Refurbished vs New Tech Calculator
Compare refurbished vs new on TCO and CO2 saved.
Buy vs Rent vs Subscribe Calculator
Find the cheapest of buy, rent, or subscribe over your usage period.
Carbon Tax Offset Calculator
Calculate carbon tax savings and ROI of an emissions reduction investment.
Related Articles
All articles
EV vs Gas TCO 2026: When Electric Actually Pays Off
Stop comparing EVs and gas cars on sticker price. The 2026 TCO model nets out the federal credit, fuel, maintenance, and residual value to give years to parity.
Read article
Repair vs Replace: The 2026 Decision Rule That Saves Money
Stop guessing whether to repair or replace. Use the 2026 cost-per-year rule with operating costs, resale value, and embedded carbon to decide in under a minute.
Read article
Solar Payback Blueprint 2026: True ROI Math for Homeowners
Stop using flat-rate solar payback math. The 2026 blueprint includes rate inflation, panel degradation, the 30 percent federal credit, and exact months to break-even.
Read article
Circular TCO vs Circular Savings: Payback Blueprint 2026
Compare linear ownership costs against circular savings with a practical 2026 model. Calculate annualized cost, lifetime savings, and payback months for sustainable investments.
Read articleCategory FAQ
What is the average personal carbon footprint?
The global average is about 4 tonnes of CO2 per person per year. The US averages 16 tonnes, the UK around 10 tonnes, and India around 2 tonnes. Net-zero pathways aim to bring everyone to 2 tonnes per person by 2050.
How is an ESG score calculated?
ESG scores combine weighted metrics across environmental (carbon, water, waste), social (labour, community, diversity), and governance (board, ethics, transparency) categories. Scores typically range 0 to 100, with 70 plus considered strong.
When is repair cheaper than replacement?
Repair usually wins when the fix costs less than 50 percent of a new unit and adds at least 2 years of useful life. A $200 phone screen repair on a $900 phone is worth it; a $500 motherboard repair on a 6-year-old laptop usually is not.
What is circular total cost of ownership?
Circular TCO adds the residual or resale value, repair costs, and end-of-life recycling credits to the standard purchase plus running cost calculation. A refurbished laptop at $600 with $300 resale at year 4 often beats new at $1,200 with $200 resale.
How much CO2 does flying produce?
A short-haul economy flight emits roughly 0.15 kg CO2 per passenger per km. A 2 hour 1,500 km flight equals about 225 kg CO2 per passenger. Long-haul economy averages 0.10 kg per km, but the total trip emits much more.
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