Cryptocurrency Footprint Calculator

Cambridge CCAF & Digiconomist Blockchain Energy Metrology

Cryptocurrency energy consumption is determined by the underlying consensus mechanism:

• Proof-of-Work: Miners solve SHA-256 cryptographic puzzles using ASIC computers, consuming gigawatts of electrical power to secure the decentralized ledger:

• Bitcoin (BTC): ≈ 700 kWh per on-chain transaction

• Bitcoin Cash (BCH): ≈ 18 kWh per transaction

• Dogecoin (DOGE): ≈ 0.12 kWh per transaction

• Proof-of-Stake: Validators stake crypto tokens instead of running energy-intensive mining hardware, cutting electrical consumption by 99.95%:

• Ethereum (ETH PoS): ≈ 0.03 kWh per transaction

• Cardano (ADA): ≈ 0.00065 kWh per transaction

• Solana (SOL): ≈ 0.00051 kWh per transaction

Carbon Intensity Factors

• Global Average Grid: 440 g CO_2/kWh

• US Average Grid: 390 g CO_2/kWh

• Coal-Heavy Grid: 820 g CO_2/kWh

• 100% Renewable Hydro/Solar: 20 g CO_2/kWh

How to Use This Calculator

Enter your Number of Transactions (e.g. 1), Cryptocurrency & Consensus Network — choose from Bitcoin (BTC / Proof-of-Work: ~700 kWh/tx), Ethereum (ETH / Proof-of-Stake: ~0.03 kWh/tx), Solana (SOL / Proof-of-History: ~0.0005 kWh/tx), Electricity Grid Carbon Intensity — choose from Global Average Grid (440 g CO2 / kWh), US National Average Grid (390 g CO2 / kWh), Coal-Heavy Mining Grid (820 g CO2 / kWh), and Transaction & Mining Benchmark — choose from Custom Volume, 1 Bitcoin Transaction (700 kWh / 308 kg CO2), 10 Bitcoin Transactions (7,000 kWh / 3.08 t CO2). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Conversion factors used in this calculator:

1 Visa transaction = 0.00149 kWh

1 km in gasoline passenger car =

Worked Example

Switching from Bitcoin to Ethereum slashes carbon emissions by 99.995%, reducing the footprint of 100 transactions from 30.8 metric tons of CO2 to just 1.3 kg of CO

2.

Understanding Your Result

For financial decisions, validate your result against your specific tax situation, current interest rate environment, and applicable regulations — these change frequently and vary by jurisdiction. A calculated estimate is a useful starting point; for decisions involving significant capital (more than one month's income), consult a certified financial planner (CFP) or CPA. Financial projections beyond 3–5 years carry increasing uncertainty — model a conservative, base, and optimistic scenario to understand the range of outcomes.