Shutter Speed Calculator — Freeze Motion or Blur It Creatively
Calculate the right shutter speed to freeze fast action, avoid camera shake, or achieve smooth motion blur. Covers the 180-degree rule for video too.
A bird in flight, a kid on a swing, a car doing 60mph — shutter speed is what decides whether you get sharp detail or a smear. Get it right and you freeze the moment perfectly. Use it intentionally and you can make flowing water look like silk.
Find the right speed for your situation with the shutter speed calculator on CalcHub.
What Shutter Speed Controls
Shutter speed is simply the duration the camera sensor is exposed to light — expressed in fractions of a second (1/60, 1/500, 1/2000) or full seconds (1s, 2s, 30s) for long exposures.
Fast shutter speeds freeze motion. Slow speeds record motion as blur, which is sometimes a problem (shaky hand, unexpected movement) and sometimes exactly what you want (silky waterfalls, light trails, intentional panning).
The Reciprocal Rule for Handheld Shooting
The classic rule: to avoid blur from camera shake when shooting handheld, your shutter speed should be at least 1/(focal length). Shooting a 200mm telephoto? Stay at 1/200s or faster. On a 35mm lens, 1/35s is the minimum — most photographers round up to 1/50s.
Image stabilization buys you additional stops, typically 3–5 stops on modern lenses. With good IBIS, 1/15s on a 200mm lens can be achievable — though that still won't freeze a moving subject.
Shutter Speed by Subject
| Subject | Recommended Speed | Notes |
|---|---|---|
| Still subjects, tripod | Any speed works | Limited by noise and diffraction |
| Walking person | 1/250s+ | Freezes most movement |
| Running/sports | 1/500–1/1000s | Freeze action |
| Birds in flight | 1/1600–1/3200s | Fast wingbeats need speed |
| Moving cars | 1/1000s+ to freeze | Slower for panning effect |
| Flowing waterfall | 1/4s–2s | Creates silk effect |
| Light painting | 10s–30s+ | Need sturdy tripod |
| Star trails | 15 min–several hours | Very dark locations |
The 180-Degree Rule for Video
Video has its own shutter speed convention: the 180-degree rule. For natural-looking motion blur in video, set your shutter speed to double your frame rate.
- Shooting 24fps → 1/48s (use 1/50s in practice)
- Shooting 30fps → 1/60s
- Shooting 60fps → 1/120s
When Motion Blur Is Your Friend
Panning shots — following a moving subject while using a slower shutter speed — keep the subject sharp while blurring the background into horizontal streaks. It implies speed in a still image more effectively than a frozen shot. Try 1/30–1/60s for cars, 1/100–1/200s for cyclists. Takes practice, but the results look amazing.
Long exposures at night turn headlights into light trails and smooth out busy city streets into ghostly stillness. A 20-second exposure can make a crowded plaza look empty.
My photos are sharp on the screen but blurry when I zoom in — what's wrong?
Usually one of two things: camera shake (fix with faster shutter or a tripod) or focus error (shallow depth of field where focus landed slightly off). At very high zoom, even great photos show some softness — judge sharpness at 100% crop, but keep in mind print sharpness is what matters for the final output.
How do I shoot a sharp photo in very low light?
It's a balancing act. You need a fast enough shutter to avoid shake, but low light demands slower speeds. Widen aperture first (go to your lens's widest), then raise ISO, then consider whether you can use a tripod or lean against a wall to stabilize. The exposure calculator helps find the right combination.
What is bulb mode?
Bulb mode holds the shutter open as long as you press the release button — used for very long exposures beyond 30 seconds (typically the camera's maximum timed exposure). Essential for astrophotography and extended light painting.
Related Calculators
- Exposure Calculator — balance aperture, shutter speed, and ISO together
- Depth of Field Calculator — see how aperture changes focus range
- Time-Lapse Calculator — find interval for smooth time-lapse sequences