Photography Tools

Free photography and filmmaking calculators that run entirely in your browser — depth of field and hyperfocal distance, exposure value, ND filter long exposure, field of view, crop factor, print size and DPI, flash guide number, 500-rule star trails, time-lapse, shutter angle, timecode and video bitrate. Nothing is uploaded.

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Depth of Field Calculator

Find hyperfocal distance, near and far focus limits and total depth of field from sensor, focal length, aperture and distance.

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ND Filter / Long Exposure Calculator

Convert a base shutter speed to a long exposure through ND filters — or reverse-solve the base — with stops and ND factor.

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Exposure Value (EV) Calculator

Compute exposure value from aperture, shutter and ISO, adjust for ISO, and list equivalent exposure settings.

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Field of View / Angle of View Calculator

Calculate horizontal, vertical and diagonal angle of view and the scene width and height a lens captures at a distance.

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Crop Factor & Equivalent Focal Length Calculator

Find your sensor's crop factor, the 35mm-equivalent focal length and the DoF-equivalent aperture for any lens.

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Time-lapse Calculator

Solve any time-lapse unknown — clip length, interval, shooting duration or frame count — plus storage from average file size.

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500-Rule / NPF Star Trail Calculator

Find the longest shutter time before stars trail using the 500 rule and the stricter NPF rule for astrophotography.

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Print Size / Megapixel / DPI Calculator

Find the largest print your photo can make at a given DPI, or the megapixels a print needs — in inches and cm.

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Flash Guide Number Calculator

Solve flash exposure with the guide number: required aperture, max flash distance or guide number, adjusted for ISO.

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Shoot Storage / GB per Shoot Calculator

Estimate the storage a photo or video shoot needs — total GB, memory cards and per-file size from shots or bitrate.

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Shutter Angle to Shutter Speed Converter

Convert cine shutter angle to shutter speed and back at any frame rate — with the 180° natural-blur reference.

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Frame Count ↔ Timecode Calculator

Convert between frame counts, SMPTE timecode and duration at any frame rate, with 29.97 drop-frame support.

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Video Bitrate & File Size Calculator

Solve video file size, required bitrate or maximum record time, with codec bitrate references and optional audio.

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