Video maths, already worked out

One page per question, each with the number at the top and the reference table it came from underneath. Every value is computed from the same data the calculators use, so nothing here can drift out of step with the tools — and if your numbers are different, the calculator that produced each page is one click away.

Frames in a duration

How many frames a running time holds, and where the last one lands in timecode. Timecode to Frames Converter does it for any value.

How many frames are in 1 second at 24 fps?
24 frames
How many frames are in 1 second at 30 fps?
30 frames
How many frames are in 1 second at 60 fps?
60 frames
How many frames are in 5 seconds at 24 fps?
120 frames
How many frames are in 10 seconds at 24 fps?
240 frames
How many frames are in 10 seconds at 25 fps?
250 frames
How many frames are in 10 seconds at 30 fps?
300 frames
How many frames are in 10 seconds at 60 fps?
600 frames
How many frames are in 30 seconds at 24 fps?
720 frames
How many frames are in 30 seconds at 30 fps?
900 frames
How many frames are in 1 minute at 24 fps?
1,440 frames
How many frames are in 1 minute at 30 fps?
1,800 frames

Duration of a frame count

The same conversion in reverse: how long a number of frames runs on a clock. Frames to Timecode Converter does it for any value.

How long is 100 frames at 30 fps?
3.333 seconds
How long is 240 frames at 24 fps?
10.000 seconds
How long is 300 frames at 30 fps?
10.000 seconds
How long is 500 frames at 24 fps?
20.833 seconds
How long is 1,000 frames at 24 fps?
41.667 seconds
How long is 1,000 frames at 30 fps?
33.333 seconds
How long is 1,000 frames at 60 fps?
16.667 seconds
How long is 5,000 frames at 24 fps?
0:03:28.333 (208.333 seconds)

Aspect ratios in pixels

The delivery dimensions behind each common ratio, from 480p up to 4K. Aspect Ratio Calculator does it for any value.

What is 16:9 in pixels at 1080p?
1920 × 1080 px
What is 16:9 in pixels at 4K?
3840 × 2160 px
What is 9:16 in pixels at 1080p?
1080 × 1920 px
What is 9:16 in pixels at 4K?
2160 × 3840 px
What is 4:5 in pixels at 1080p?
1080 × 1350 px
What is 1:1 in pixels at 1080p?
1080 × 1080 px
What is 4:3 in pixels at 1080p?
1440 × 1080 px
What is 3:2 in pixels at 1080p?
1620 × 1080 px
What is 2:1 in pixels at 1080p?
1920 × 960 px
What is 1.85:1 in pixels at 1080p?
1920 × 1038 px
What is 21:9 in pixels at 1080p?
1920 × 822 px
What is 2.39:1 in pixels at 1080p?
1920 × 804 px
What is 2.39:1 in pixels at 4K?
3840 × 1606 px

Reframing between shapes

What a crop or a pad costs when footage has to change aspect ratio. Aspect Ratio Calculator does it for any value.

How do you convert 1920 × 1080 to 9:16?
Crop 608 × 1080 → 1080 × 1920
How do you convert 1920 × 1080 to 4:5?
Crop 864 × 1080 → 1080 × 1350
How do you convert 1920 × 1080 to 1:1?
Crop to 1080 × 1080
How do you convert 1920 × 1080 to 2.39:1?
Crop to 1920 × 804
How do you convert 3840 × 2160 to 9:16?
Crop 1216 × 2160 → 2160 × 3840
How do you convert 1080 × 1920 to 16:9?
Crop 1080 × 608 → 1920 × 1080

Where these numbers come from

Nothing on these pages is typed in by hand. Frame counts come from the same frame rate table as the frame calculator, including the exact 1000/1001 values behind 23.976, 29.97 and 59.94 fps. Pixel dimensions come from the ratio data behind the aspect ratio calculator , rounded to even numbers because H.264 and H.265 require them in 4:2:0.

That is the point of generating them: a published answer and the tool that computes it are the same arithmetic, so correcting one corrects both. Pages only exist for combinations people actually ask about — there is no page for every possible pairing, because a number without a question behind it is not worth indexing.