Film & Video Production
Video File Size Calculator
File size of a video from its bitrate and duration, including the audio track.
bytes = (video bitrate + audio bitrate) ×…
Also called video size calculator · mp4 file size
Tech & Media · 10 calculators
Film & Video Production Calculators
Timecode math, frame rate conversion, shooting ratio, footage storage, recording time and render time estimates.
Film & Video Production
Recording Time Calculator
How much video or audio fits on a card or drive at a given bitrate.
seconds = usable bytes × 8 ÷ bitrate in b…
Also called how long can i record · card recording time
Film & Video Production
Video Bitrate Calculator
Bitrate needed for a target file size, or recommended bitrate for a resolution and frame rate.
bitrate ≈ width × height × fps × motion f…
Also called bitrate calculator · target file size bitrate
Film & Video Production
Time to Frames Calculator
Convert a duration to a frame count at any frame rate, with the timecode.
frames = seconds × frame rate
Also called duration to frames · seconds to frames
Film & Video Production
Timecode Calculator
Add, subtract and convert SMPTE timecode, with drop-frame handling.
total frames = (HH×3600 + MM×60 + SS) × f…
Also called smpte timecode calculator · timecode converter
Film & Video Production
Frame Rate Converter
How a clip’s duration and frame count change when converted between frame rates.
retimed duration = source frames ÷ target…
Also called fps converter · pal ntsc conversion
Film & Video Production
Aspect Ratio Calculator
Find the aspect ratio of any width × height, or calculate a missing dimension for 16:9, 4:3, 21:9 and custom ratios.
W : H = (W ÷ GCD) : (H ÷ GCD)
Also called aspect ratio · 16:9 calculator
Film & Video Production
Video Resolution Calculator
Compare video resolutions by pixel count, aspect ratio and the bitrate each needs.
pixels per frame = width × height
Also called resolution comparison · 4k vs 1080p
Film & Video Production
Shooting Ratio Calculator
Footage shot against footage used, with the storage and edit time it implies.
footage shot = final runtime × shooting r…
Also called footage ratio · shoot to edit ratio
Film & Video Production
Render Time Calculator
Estimated render or export time from the render speed ratio, with the finish time.
render time = duration ÷ render speed × p…
Also called export time calculator · encoding time
Key film & video production formulas
| Video File Size | bytes = (video bitrate + audio bitrate) × seconds ÷ 8 |
|---|---|
| Recording Time | seconds = usable bytes × 8 ÷ bitrate in bits per second |
| Video Bitrate | bitrate ≈ width × height × fps × motion factor ÷ 1,000,000 |
| Time to Frames | frames = seconds × frame rate |
| Timecode | total frames = (HH×3600 + MM×60 + SS) × fps + FF |
| Frame Rate Converter | retimed duration = source frames ÷ target frame rate |
| Aspect Ratio | W : H = (W ÷ GCD) : (H ÷ GCD) · H = W × b ÷ a |
| Video Resolution | pixels per frame = width × height |
| Shooting Ratio | footage shot = final runtime × shooting ratio |
| Render Time | render time = duration ÷ render speed × passes × (1 + overhead) |
Film & Video Production questions
What bitrate should I use for 1080p?
About 8 Mbps for good quality streaming, 12–20 Mbps for high-motion content, and 50 Mbps or more for editing masters.
What are the common aspect ratios?
16:9 for HD video and most monitors, 4:3 for older TVs and iPads, 21:9 for ultrawide displays, 1:1 for square social posts, 9:16 for vertical video and 3:2 for many camera sensors.