Shutter angle
calculator.
Convert shutter angle and frame rate into shutter speed and exposure time — the 180° rule, or any angle you like. For keeping motion blur natural at any frame rate.
180° is the natural-looking default. Narrower angles (90°, 45°) crisp up motion — think the landing sequences — while wider angles smear it.
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Shutter angle, answered.
How do you convert shutter angle to shutter speed?
Shutter speed in seconds is the angle divided by 360 × frame rate. At 24fps
with a 180° shutter that's 180 / (360 × 24) = 1/48 s.
What is the 180-degree shutter rule?
A 180° shutter exposes for half the frame interval, which gives natural-looking motion blur. It's the standard starting point for narrative film and video.
What shutter speed is 180° at 25fps?
180° at 25fps is 1/50 s. At 30fps it's 1/60 s, and at 24fps it's 1/48 s.