Compare your cycling power meter Fit files

Upload multiple Fit files of the same activity and compare your watts for free.

Analyse how well your devices correlate

Our power meter comparison tool:

  • Free to use & no signup required
  • Compare watts, rpm (cadence), power curve and left/right data
  • Zoom into activity segments and get all the stats for your selection
  • Time offsets, power offsets and smoothing at your control
  • Save and reopen comparisons with .ctw files
  • Fast, private and secure - all the analysis on your computer

We loaded up an example below already, so you can have a play 😊

Select your own files 👇 when you are ready


See our How to section for more tips, tricks & descriptions

⚠️ This tool is best viewed on a desktop or tablet. Everything still works on smaller devices, it's just harder to delve in to the details.

Check out our

How To

section for how to get the most out of the tool and some analysis tips

I'm a software developer and cyclist based in the South East of the UK.

Like most keen cyclists I get far too nerdy analysing rides.

I hope this tool helps you fully send your indulgence too.

me

If you found this tool helpful...

Consider helping me cover hosting costs and ongoing upkeep of Compare The Watts


Any contribution is greatly appreciated.

Happy Riding!

Your files your data

We don't upload your files to any server. Compare The Watts does not store your .fit file data. Its shared only with you and your browser ✊

Your browser only reads the file name, power, power LR balance, cadence and time data in your .fit files, all other fields are ignored.

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