Sustainability & ESG
42 free sustainability & esg tools in the Calculators & Converters collection — every one runs in your browser with no signup and no uploads.
AI Model Training Carbon Estimator
Estimate the CO2e of training a machine-learning model from hardware, time, and grid intensity
Carbon Inset vs Offset Decision Tool
Decide whether value-chain insetting or market offsetting fits your strategy
CBAM Certificate Quantity & Cost Planner
Plan CBAM certificate purchases and cost for your import declaration
Circular Economy Maturity Assessment
Assess your company's circular economy maturity across design, use, and recovery
Climate Risk TCFD Screener
Screen physical and transition climate risks for TCFD disclosure
CO2 Production During Fermentation
Estimate grams of CO2 produced and residual dissolved CO2 level
CS3D / CSDDD Applicability Checker
Check if your company is in scope for the EU Corporate Sustainability Due Diligence Directive
CSRD / ESG Reporting Checklist
Interactive CSRD double-materiality and ESRS disclosure checklist
Data Centre PUE & Carbon Calculator
Calculate PUE efficiency and CO2 footprint for your data centre or server room
Diet & Food Carbon Footprint Calculator
Estimate annual CO2e from your diet — meat, dairy, plant-based
Embodied Carbon Calculator (Building Materials)
Estimate CO2e from construction materials: concrete, steel, timber, insulation
Extended Producer Responsibility Fee Estimator
Estimate EPR packaging fees across UK and EU markets by material and tonnage.
EU Carbon Removal Certification (CRCF) Eligibility Checker
Check if your carbon removal activity qualifies under the EU CRCF framework
EU Ecolabel Eligibility Checker
Check if your product or service category is eligible for the EU Ecolabel
SFDR Product Classification Checker
Classify a fund as Article 6, 8, or 9 under the EU SFDR
EU Taxonomy Eligibility & Alignment Checker
Check if your economic activity qualifies as environmentally sustainable under EU Taxonomy
EU Deforestation Regulation (EUDR) Checker
Check if your commodities fall under the EU deforestation due-diligence rules
Fermentation CO2 Airlock Bubble Rate Interpreter
Estimate fermentation stage from airlock bubble frequency
F-Gas Quota & HFC Phase-Down Calculator
Calculate F-gas CO2-equivalent and check EU quota phase-down position
Flight Carbon Footprint Calculator
Calculate CO2e emissions for any flight with radiative forcing
Fuel Cost vs CO2 Comparator
Compare petrol, diesel, LPG, and EV on cost and CO2 per mile
Global Plastics Treaty Readiness Checker
Assess your plastic product strategy against the proposed UN Plastics Treaty
Green Lease Clause Scorer
Score a commercial lease against green lease best-practice clauses
Greenwashing Risk Scorer
Score your sustainability claims for greenwashing risk under the EU Green Claims Directive
Internal Carbon Price (ICP) Impact Calculator
Model the P&L impact of an internal carbon price across business units
Simplified LCA Hotspot Identifier
Identify the top carbon and energy hotspots across a product's lifecycle
Nature-Positive Risk Screener (TNFD)
Screen business activities for nature-related dependencies and impacts (TNFD LEAP)
Net Zero Target Pathway Calculator
Build a linear or science-based net zero reduction pathway from base year
Packaging Carbon Footprint Calculator
Estimate CO2e for packaging across plastic, glass, paper, and metal
Packaging Recyclability On-Pack Labelling Checker
Check the correct recyclability label for your packaging material
Plastic Recyclability & SUP Directive Checker
Check your plastic packaging against the EU Single-Use Plastics Directive
Product Carbon Footprint Estimator
Estimate cradle-to-gate CO2e for a manufactured product
Product Ecodesign Scorecard
Score your product against EU ESPR ecodesign criteria
REACH / RoHS Substance Checker
Check if your product is restricted under REACH or RoHS substance rules.
Recycling Rate Estimator
Estimate your household or business recycling rate and CO2 savings
ReFi Tokenised Carbon Credit Equivalence Calculator
Compare traditional vs tokenised carbon credit pricing, verification, and retirement
Right-to-Repair Product Scorer
Score your product's repairability against EU and UK rules
Scope 1 / 2 / 3 GHG Emissions Estimator
Estimate your company's GHG inventory across all three scopes
Scope 2 Market-Based vs Location-Based Emissions Comparator
Compare Scope 2 emissions under the market-based and location-based methods
Tree Equivalent Carbon Calculator
Convert your CO2e into the number of trees needed to absorb it
Waste Hierarchy Optimizer
Find the highest waste hierarchy option for your material under the EU WFD
Water Footprint Calculator
Estimate your personal or product water footprint in litres