What is the difference between 24 and 23.976 fps?

They differ by a factor of exactly 1000/1001. 23.976 fps is 24 multiplied by 1000/1001, the NTSC pulldown adjustment used to fit film into the NTSC colour standard. The same factor links 30 and 29.97 fps.

How do I convert a frame count between rates?

Divide the frame count by the source fps to get the duration in seconds, then multiply by the target fps. This tool does it for you and shows the duration too.

Is any video uploaded?

No. The tool only does arithmetic on the numbers you type, entirely in your browser.

Frame Rate Converter

Convert between video frame rates and frame counts.

Frame rate converter

Convert between video frame rates, see the rate ratio, and recalculate a frame count so a clip keeps the same real-time duration at a new fps.

Note the NTSC quirk: 23.976 and 24, or 29.97 and 30, differ by exactly the factor 1000/1001 (pulldown). Enter your rates and the answer updates instantly — all in your browser.