Real-time and historical CO2 levels

Atmospheric CO2 Levels Graph

This graph features atmospheric CO2 levels that combine measurements from as far back as 800,000 years up to the present day. The graph is customizable and can be resized, printed, or pasted into your website. This is a free service, but we do ask for a donation if you find this useful. This is a project of the 2 Degrees Institute, a non-profit organization.

A graph for researchers and educators

Key features

Real-time and Historical data

CO2 levels are updated daily with data directly from NOAA's science lab on the slopes of Moana Loa volcano on the Big Island of Hawaii. Atmospheric carbon dioxide measurements have been collected here daily since 1959. Pre-1959 data comes from ice core data taken from Antarctica. Learn more about the data sources.

Free CO2 Levels Graph

This interactive graph is free to use on your website. Simply choose your color theme and then copy and paste 2 lines of code. Data and source code is hosted on our servers so you do not have to worry about using up your server's bandwidth. New CO2 measurement data is updated automatically, every day.

Zoomable and Printable

View atmospheric CO2 levels over a span of thousands of years or zoom to specific time periods. Use your fingers to pinch and zoom on a handheld device or use a mouse with a computer. Export the chart to PNG, JPG, PDF or SVG format with the click of a button or print the chart directly from the web page.

Customizable and Responsive

Choose from 4 color themes to match your website's look and feel. Customize the width and height of your graph or have it fill your entire screen. The carbon dioxide levels graph is responsive and can automatically resize to fit whatever device or screen size it is being viewed on.

Real-time and historical CO2 data combined.

Data Sources

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