180° ruleMotion blurFlicker guidance
Video calculator
Video Shutter Speed Calculator
Choose your frame rate and shutter angle to calculate an ideal video shutter speed, compare common camera settings and check artificial-light flicker guidance.
Recommended camera setting
Use a shutter speed of 1/50 secExact mathematical result: 1/50 secExact results
Shutter and motion details
Exposure compared with 180°
The same exposure time as a 180-degree shutter.
No exposure compensation is suggested relative to 180 degrees.
50Hz / 60Hz flicker guidance
The calculator never changes your selected shutter angle automatically. Treat these settings as testable starting points, not guarantees.
Copyable result
Camera setup summary
Calculating…
Video shutter guide
Choosing shutter speed for video
What shutter speed should I use for video?
A 180° shutter is a conventional starting point. At 25 fps this gives 1/50 sec. Different angles are valid creative choices for softer or sharper motion.
What is the 180-degree shutter rule?
It keeps the exposure open for half of each frame interval. “Double the frame rate” refers to the shutter-speed denominator: 25 fps corresponds to about 1/50 sec.
How is shutter angle calculated?
Exposure time equals shutter angle divided by 360 × frame rate. In reverse, shutter angle equals 360 × frame rate × exposure time.
Should shutter speed always be double the frame rate?
No. The 180° convention often looks natural, but wider angles add blur and narrower angles make motion crisper. Choose deliberately for the scene.
How do shutter speed and frame rate affect motion blur?
At a fixed frame rate, a faster shutter or smaller angle records less movement in each frame. A slower shutter or wider angle records more movement.
How can I reduce flicker under artificial lighting?
Under 50Hz lighting, 1/50 and 1/100 sec are useful starting points; under 60Hz, try 1/60 or 1/120 sec. LEDs, screens and dimmers may use different PWM frequencies, so test the actual light.
Do I need an ND filter for video?
In bright conditions, ND filtration can let you retain the aperture and shutter angle you want without overexposing. The needed strength depends on scene brightness, aperture and ISO.
Reference table
Common 180° shutter combinations
| Frame rate | Exact 180° shutter | Common camera setting |
|---|---|---|
| 24 fps | 1/48 sec | 1/50 sec |
| 25 fps | 1/50 sec | 1/50 sec |
| 30 fps | 1/60 sec | 1/60 sec |
| 50 fps | 1/100 sec | 1/100 sec |
| 60 fps | 1/120 sec | 1/120 sec |
| 120 fps | 1/240 sec | 1/250 sec |
FAQ
Video shutter questions
Is 172.8° useful at 24 fps?
Yes. At 24 fps it produces exactly 1/50 sec, which can be a useful 50Hz-lighting starting point while remaining close to 180° motion blur.
Does a flicker-safe shutter speed guarantee no flicker?
No. Mains frequency is only one factor. LEDs, screens, dimmers and PWM-controlled fixtures can cycle at other frequencies, so always test the actual setup.
Are my settings uploaded or stored?
No. Every calculation runs locally in the browser and the tool does not upload or store your inputs.
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