Photography Calculators
Last updated: September 2026
Magnification Ratio Calculator
Calculate the magnification ratio of a lens at a given subject distance — the ratio of subject image size on the sensor to actual subject size.
Field of View Calculator
Calculates the horizontal angle of view in degrees for any focal length and sensor width combination.
Golden Hour & Blue Hour Calculator
Find when the evening sun drops to a chosen golden-hour angle for any latitude and date.
ND Filter Exposure Calculator
Calculate the correct long-exposure shutter speed when using one or more stacked ND filters.
Exposure Equivalents Calculator
Find equivalent camera settings that produce the same exposure value when you change aperture, shutter speed, or ISO.
Exposure Value Calculator
Computes the Exposure Value (EV) at ISO 100 from aperture and shutter speed, giving a single number that represents the total light reaching the sensor.
Timelapse Interval Calculator
Determine the interval between shots needed to turn an event of any length into a timelapse clip of the length you want.
Studio Lighting Ratio Calculator
Determine the exact fill light power needed to achieve a target lighting ratio in studio photography.
Hyperfocal Distance Calculator
Finds the closest focus distance at which a lens keeps everything from half that distance to infinity acceptably sharp.
Macro Magnification Calculator
Compute the image magnification ratio for macro photography from focal length, focus distance and extension tube length.
Panorama Calculator
Calculate how many shots you need to cover a panorama, given your lens, sensor, and desired overlap.
Long Exposure Time Calculator
Calculates the correct long-exposure shutter speed when stacking ND filters, accounting for reciprocity failure.
Exposure Calculator
Find the equivalent shutter speed when you change aperture, keeping overall exposure constant.
Golden Hour Calculator
Calculate the start time of golden hour — the period of warm directional sunlight just before sunset — by subtracting 60 minutes from your local sunset time.
Print Size Resolution Calculator
Calculates the uncompressed file size in megabytes required to print an image at a given size, DPI, and color depth.
Camera Storage & File Size Calculator
Estimate what percentage of a memory card a session will fill based on your camera's megapixels and number of photos (RAW files assumed).
Timelapse Calculator
Calculate the shooting interval between frames for a timelapse sequence.
Studio Lighting Calculator
Determines the fill light power needed to achieve a desired lighting ratio in a multi-light studio setup.
Depth of Field Calculator
Estimates the total depth-of-field range in millimeters from focal length, aperture, and subject distance, assuming a full-frame sensor.
Pixels to Inches Converter (DPI-based)
Convert between pixels and inches at a chosen DPI/PPI.