Video Timestamp Calculator
Add or subtract video timestamps, or find the gap between two, and see the frame number and HH:MM:SS:FF timecode at 24, 25, 30 or 60 fps.
Video & Audio
17 tools
Tools in this category
Audio File Size Calculator
Estimate audio file size from bitrate and duration, or from sample rate, bit depth and channels for WAV. One minute of CD audio is 10.58 MB.
Audio Bit Rate Calculator
Work out uncompressed PCM audio bit rate from sample rate, bit depth and channel count, plus WAV file size for any duration. CD audio is 1,411.2 kbit/s.
Audio Duration Calculator
Work out how long an audio file plays from its size and bitrate, or from WAV sample rate, bit depth and channels. 4.8 MB at 128 kbps is 5:00.
Video Timecode Calculator
Add or subtract two HH:MM:SS:FF timecodes at 24, 25, 30, 48, 50 or 60 fps and see the result as timecode, total frames and seconds.
Video Resolution Calculator
Rescale any video frame size by width or height while keeping its aspect ratio, with even-pixel rounding, megapixels and the common name like 720p or 4K UHD.
Video Crop Calculator
Find the largest centred crop of a video frame for 9:16, 1:1, 4:5 or 2.39:1, with even pixel sizes, x/y offsets and a ready FFmpeg crop string.
Video Bitrate Calculator
Work out the video bitrate that fits a clip into a set file size: enter size in MB, GB, MiB or GiB, the running time and audio kbps.
Video File Size Calculator
Estimate a video's file size from its video and audio bitrates and running time. Shows MB, GB and GiB, e.g. 8 Mbps for one minute is 60 MB.
Video Duration Calculator
Find a video's running time from its file size and bitrate, or from frame count and frame rate. A 1 GB file at 8 Mbps runs 16 min 40 s.
Video Frame Rate Calculator
Work out playback speed, slowdown factor, frame count and timeline length when footage shot at one frame rate is conformed to another, e.g. 120 to 24 fps.
Video Aspect Ratio Calculator
Reduce any video resolution to its aspect ratio and find the matching width or height for a resize, e.g. 1920×1080 is 16:9 and 1280 wide needs 720 tall.
Cents Calculator Music
Find the interval in cents between two frequencies, with the ratio, semitone count and nearest named interval. A 3:2 fifth comes out at 701.96 cents.
Interval Calculator Music
Name the interval between two spelled notes: quality and number, semitones, inversion, cents and the equal-tempered ratio. C4 to G4 is a perfect fifth.
Frequency Counter Music
Paste a list of notes such as C4 E4 G4 to count how often each pitch occurs and see its frequency in Hz, with A4 set to 440, 432 or 442 Hz.
Beat Counter
Paste beat times as seconds or minutes:seconds and get the tempo in BPM, the beat count, bars, and how steady the gaps are, beat by beat.
Delay Calculator (Music)
Turn a song tempo into delay and reverb times in milliseconds for every note value, straight, dotted or triplet. At 120 BPM a quarter note is 500 ms.