Compare annual operational carbon emissions for your commute
Trip Details
Car Details
E-bike & Grid Details
Emission Savings Breakdown
How to Use This Tool
Enter the total annual distance you plan to replace with e-bike travel, selecting miles or kilometers as your unit. Input your car’s efficiency: use MPG for gas or hybrid vehicles, or kWh per 100 miles for electric cars. Adjust the e-bike energy use if your model differs from the default 1.5 kWh per 100 miles, then select your local grid carbon intensity from the preset options or enter a custom value. Click Calculate Savings to view your detailed emission breakdown, or Reset to clear all inputs.
Formula and Logic
All calculations use standard, publicly available emission factors for operational (fuel/electricity use) emissions only:
- Gas/hybrid car emissions: (1 / MPG) * 19.6 lb CO2e per mile (1 gallon of gasoline produces ~19.6 lb CO2e)
- Electric car/e-bike emissions: (kWh per 100 miles / 100) * grid carbon intensity (lb CO2e per kWh)
- Annual savings: Total car emissions minus total e-bike emissions for the entered distance
- Percent reduction: (Annual savings / Total car emissions) * 100
- 5-year savings: Annual savings multiplied by 5
Practical Notes
Emission factors vary significantly by region: grid carbon intensity depends on your local energy mix (coal, natural gas, renewables), and car efficiency may differ from EPA estimates based on driving habits and maintenance. This tool excludes lifecycle emissions, including vehicle manufacturing, battery production, and end-of-life disposal, as these vary widely by model and supply chain. For more accurate results, use your own utility provider’s reported grid intensity and your car’s actual fuel efficiency from personal fuel logs.
Why This Tool Is Useful
Switching short car trips to e-bike travel is one of the most impactful individual actions to reduce operational carbon emissions. This tool provides transparent, customizable calculations to support personal sustainability goals, corporate sustainability reporting, and policy advocacy for active transport infrastructure. Detailed breakdowns help users understand exactly how distance, vehicle type, and energy choices impact total savings over time.
Frequently Asked Questions
Do these calculations include manufacturing emissions?
No, this tool only accounts for operational emissions from fuel or electricity use. Manufacturing, battery production, and end-of-life disposal emissions are excluded, as these vary widely by vehicle model and supply chain.
How do I find my local grid carbon intensity?
Check your regional energy provider’s sustainability report or public databases like the IEA Global Energy & CO2 Status Report for region-specific grid emission factors.
Can I use this for non-commute trips?
Yes, enter any annual distance you plan to replace with e-bike travel, including errands, leisure trips, and other short-distance travel.
Additional Guidance
Track your car’s actual MPG over 3-6 months of regular driving for more accurate inputs, as EPA estimates may not reflect your specific driving conditions. If using a custom grid intensity, prioritize data from local environmental agencies over global averages for better precision. Consider that e-bike batteries typically need replacement every 3-5 years, which adds minor lifecycle emissions not captured here. For policy or corporate use, pair these operational savings with lifecycle assessment data to build comprehensive emission reduction reports.