WPM to CPM Converter
Convert any words-per-minute score into characters per minute while optionally tailoring the word length assumption and accuracy factor. The result lets you compare certification benchmarks, scope transcription projects, and configure speech-to-text or subtitling tools that request CPM.
Average word length varies by language and context, so treat this as a benchmark rather than a certification score.
Examples
- 72 WPM with the default 5 characters ⇒ 360.00 characters per minute
- 90 WPM with 97% accuracy ⇒ 436.50 characters per minute
FAQ
Why do calculators use five characters per word?
It is the long-standing standard in typing tests and textbooks because large language samples show an average close to five keystrokes per word.
Can I adjust the multiplier for my writing style?
Yes. Sample a few hundred words of your own text, count the characters, and multiply your WPM by (your characters per word ÷ 5) for a tailored CPM.
Does accuracy or error rate change the CPM?
The formula measures raw speed. If you want an accuracy-adjusted CPM, multiply by your accuracy percentage before reporting the value.
Is punctuation and whitespace included?
Yes. Spaces, punctuation, accented letters, and numbers all count because each is a keystroke that affects throughput.
How do I convert CPM back to WPM or CPS?
Divide the CPM result by 5 to estimate WPM, or divide by 60 to show characters per second for live captioning.
What training improves both WPM and CPM?
Combine daily accuracy drills, ergonomic posture, and targeted burst practice. The stronger your accuracy, the easier it is to sustain high CPM without fatigue.
Additional Information
- Formula: CPM = WPM × characters per word × accuracy factor.
- If you skip the optional inputs, the calculator defaults to 5 characters per word and 100% accuracy, mirroring certification scoring rules.
- To reverse the calculation instantly, pair this page with the CPM to WPM converter linked below.