Frame Rate Calculator
Video is a sequence of still frames shown quickly, and many editing tasks come down to converting between duration and frame count. This calculator multiplies a clip's length by its frame rate to give the total number of frames, reports how long a single frame lasts, and converts the duration into minutes. Enter the frame rate your project uses, whether 24 for film, 29.97 for NTSC broadcast, or 60 for smooth motion, and the calculator returns exact counts for editing, rendering, and timeline planning.
Frame rate formula
total frames = duration (seconds) * frame rate (fps)
time per frame (seconds) = 1 / frame rate
time per frame (ms) = 1,000 / frame rate
duration (minutes) = duration (seconds) / 60
Frame count is simply rate times time. The time per frame is the reciprocal of the frame rate, expressed in seconds and milliseconds.
Frame rate facts
- Film is traditionally projected at 24 frames per second.
- PAL regions commonly use 25 frames per second; NTSC regions use 29.97.
- NTSC's 29.97 rate came from adding colour to the original 30 fps system.
- High frame rates such as 120 fps are used to capture slow motion.
- One frame at 24 fps lasts about 41.7 milliseconds; at 60 fps about 16.7 milliseconds.
Frame rate: frequently asked questions
How do I calculate the total number of frames in a clip?
Multiply the duration in seconds by the frame rate in frames per second. A 10-second clip at 24 frames per second contains 240 frames. This calculator multiplies your duration and frame rate to give the total frame count, and also reports the time each single frame occupies.
What are common video frame rates?
Film is traditionally 24 frames per second. Broadcast video is often 25 (PAL regions) or 29.97 (NTSC regions), and many digital formats use 30 or 60. Higher rates like 120 are used for slow motion. Enter whichever rate your project uses; the calculator handles any value.
How long is a single frame?
The duration of one frame is one divided by the frame rate. At 24 frames per second, each frame lasts about 0.0417 seconds, or roughly 41.7 milliseconds. At 60 frames per second, each frame lasts about 16.7 milliseconds. This is the time-per-frame output of the calculator.
Why is NTSC video 29.97 instead of 30?
When colour was added to the original 30-frames-per-second black-and-white NTSC system, the rate was nudged to 29.97 to avoid interference between the colour and audio signals. If your project uses 29.97, enter that exact value rather than 30 for accurate frame counts over long durations.
How do I find duration from a frame count?
Divide the total number of frames by the frame rate to get duration in seconds. For example, 1,440 frames at 24 frames per second is 60 seconds. This calculator focuses on duration-to-frames, but the inverse is a simple division you can do with the same two numbers.
Official sources
- U.S. Federal Communications Commission: Digital television standards.
- Library of Congress: Sustainability of digital video formats.
Reviewed by the CalculatorHub team, edited by James Graham, 16 June 2026. See our methodology.