Calculate.
Discover your personal carbon footprint. It takes just 5 minutes and covers housing, travel and consumption.
Discover your climate impact in 5 minutes
How can I make a real difference?
Commit.
Set your climate goals and track your progress. Join over 2 million people already making a difference.
Contribute.
Go beyond your own footprint. Balance what you can't yet reduce and help fund the solutions our planet needs.
Calculate.
Every journey starts with knowing where you stand.
Calculate your flight emissions
Flying is one of the biggest parts of most people's footprint. Enter your trips, see the real climate cost of your air travel, and discover what you can do about it.
Calculate your car emissions
From daily commutes to weekend drives, your car adds up. See how your trips translate to emissions, and how switching fuel type could change the numbers.
Community Voices
I am a high school Biology teacher, so I LOVE to use this program with my students when we discuss sustainability, pollution, and the Biogeochemical Cycles! The students love seeing their impact and working together to come up with their solutions to make the world a cleaner place!
— Susan, United States
This measurement tool has completely changed how I view my life and business decisions. I can now track how my choices are having a positive effect on my footprint, and it drives me to do more.
— Anna, Canada
I'm proactive when considering the effect my life has on my granddaughter's future. I'm 79 but she is only 13 so I won't be around for much of her adult life and it's important to me to do my best for her future. Completing the Climate Hero carbon calculator gives me an opportunity to see how the way I live my life compares to others and how I can continue to improve my carbon footprint.
— Angela, United Kingdom
Was looking for a new carbon calculator to see my footprint 5 years later, really simple and quick to do. Alongside actions I can do, for the carbon I cannot address there is an easy carbon offset option to help feel part of doing my bit and set up a monthly subscription.
— Heather, United Kingdom
The explanation and guidance to the questionnaire was very simple and easy to do as well as fast! You got the results of your answers immediately in a well structured way. Moreover the whole process actually produced a tangible result that I'm very pleased with.
— Helen, Belgium
Personal carbon footprint was easy to assess. I liked the second part where you set goals to reduce your CF. Great to have something to measure. Keep up the good work - it is so important for each of us to do our share of reducing CO2 emissions
— Phil, New Zealand
The ease of use of the ClimateHero website greatly encourages people to continue the process and contribute to it.
— Chantal, Canada
Love climate hero! The semi yearly updates keep me on track to becoming my own climate hero!
— Jolene, Canada
Lots of very useful and interesting information, and advice given - without judgement!
— Susan, United Kingdom
A great experience with Climate Hero. It was easy, fast and an amazing vibe. They do fantastic work with the environment on our beautiful earth.
— Travenafenton, Australia
4,036,276 tonnes of CO₂ pledged to be reduced
— by people like you. The same as permanently removing 2.7 million diesel cars from the road. Forever.
Contribute
Ready to do even more for the planet?
Use your voice
The fastest way to reduce emissions is to bring others along. Talk to family, friends, and colleagues about the choices that matter, and share the calculator as a great starting point.
Let your money work for the planet
Where your money sits matters as much as where you spend it. Pensions, savings, and investments are quietly shaping the economy. Make sure yours is funding the transition, not working against it.
Balance your emissions
For the emissions you can't yet reduce, fund verified projects that only happen because of your contribution. This is called additionality, and it makes your climate action genuinely count. Not sure where to start? Calculate your footprint first.
Give the gift of climate action
Give someone a month, six months, or a year of climate action in their name. A verified contribution, a certificate, and a gift that does real good in the world.
Community engagement
Trusted by teams, schools and organisations across the world
Real change happens when thousands of small actions add up. Seeing more than 1,000 climate calculations completed by our members is proof that sustainability becomes powerful when people act together.
Maria Bolin
CEO
JAK MedlemsbankJAK passes 1,000+ climate calculations
JAK Medlemsbank is no ordinary bank. As a member-owned bank, their vision is to be the natural choice for anyone who wants to contribute to sustainable development for people, environment, and economy. JAK is also our long-standing partner, having run climate calculations with their members for four years.
That commitment keeps paying off. In 2026 alone, another 195 members calculated their emissions, and JAK members start from an average footprint well below that of a typical individual. For a small bank, that's remarkable engagement, and a sign of how seriously this community takes its impact.
1,023
calculations since start
1,107
tCO₂e committed reduction
= 738
diesel cars removed
Climate projects
Safe Water - Uganda
Today, 81% of Uganda’s population lacks access to clean water, forcing families to boil unsafe water with firewood or coal. This leads to deforestation and increased CO₂ emissions. By investing in clean water solutions, we reduce the need for firewood, protect forests, improve health, and create new opportunities for local communities.
- 90 000
- People with clean water
- €25
- per tonne CO₂e