Travelmath provides an online carbon emissions calculator to help you find the CO2 footprint of any flight. You can enter airports, cities, states, countries, or zip codes to compute the CO2 emissions between any two locations. The approximate carbon emissions are shown in pounds, kilograms, and metric tonnes. You can view the effects of radiative forcing and other variables on the measure of carbon dioxide equivalents (CO2e). Formulas are based on the UK DEFRA specifications for domestic, short haul, and long haul international flights. Carbon emissions due to airline travel can impact climate change, so it's important for us to look for eco-friendly ways to help the environment and leave a greener world for the next generation.