Grade percentage calculator for running. Learn what grade % means, how to spot steep climbs, and why grade matters more than total elevation gain.
Grade is the most useful way to describe how steep a hill feels. Use grade % and climb length to plan pacing and effort.
Every page on this site has a Markdown mirror at the same path with a .md suffix (for example /calculator.md), and honors an Accept: text/markdown request header on the HTML URL. The calculations here are also available as callable tools through a free public MCP server — no account or API key.