All Free Online Calculators
Browse the full collection of free calculators for finance, health, math, conversions and everyday decisions. Search instantly or jump straight to a category.
Estimate body fat percentage from tape measurements.
Convert aperture, shutter speed, and ISO into an exposure value.
Near and far limits of acceptable sharpness for any lens setup.
Find the focus distance that keeps everything to infinity sharp.
Crop factor and full-frame equivalent focal length and aperture.
Horizontal, vertical, and diagonal angle of view for a lens and sensor.
Slowest shutter speed you can hand-hold without blur.
New exposure time after adding a neutral density filter.
Compare two exposure settings and see the difference in stops.
New shutter speed that keeps exposure the same after changing aperture or ISO.
Largest print you can make from an image at a chosen quality.
Pixels and megapixels required for a print of a given size.
Pixel size and the aperture where diffraction starts to soften images.
How many photos fit on a memory card and how long it lasts.
How many hours of video fit on a card at a given bitrate.
Slow-down factor and final clip length from frame rates.
Convert between shutter angle, frame rate, and shutter speed.
Frames, clip length, and storage for a time-lapse sequence.
Aperture needed for correct flash exposure at a given distance.
How much light you lose when you move a light farther away.
Reproduction ratio, effective aperture, and exposure loss for close-ups.
How far to stand to fit your subject in the frame.
Ground resolution and image footprint for drone mapping.
Number of photos for a full 360° panorama with overlap.
Longest exposure before stars turn into trails.
Estimate exposure outdoors without a light meter.
Best viewing distance for a print and the resolution it really needs.
Resolution left after cropping in to simulate a longer lens.
Corrected exposure time for long film exposures.
True cost of shooting film including development and scanning.