Photography Calculators precise. practical. free.
A growing collection of professional calculators for exposure, optics, flash, color and business – built from daily practice and designed to be used right on set, out in the landscape or in the studio.
Every tool runs instantly in your browser. No sign-up, no ads, no hidden limits – just open it and calculate.
The most popular tools.
Four calculators you will reach for most often – from the depth-of-field classic to an honest hourly-rate calculation for self-employed photographers.
Depth of Field Calculator
Optimal aperture for the depth of field you want and the hyperfocal distance.
Exposure Value Calculator
Calculate light values (LV/EV) from aperture, shutter speed and ISO.
Flash Distance
Correct flash distance for macro and close-up photography.
Hourly Rate Calculator
Realistic hourly rate including overhead and profit margin.
Every calculator grouped by discipline.
Six themes, from exposure to business. Every calculator clearly shows what it computes, what inputs it needs and where it helps in practice – plus background explanations of the formulas behind it.
Exposure & Light Values
Calculators for precise exposure metering and light value math
Exposure Value Calculator (LV/EV)
Calculate light and exposure values from aperture, shutter speed and ISO
Extension Factor Calculator
Exposure compensation for extension tubes, filters and converters
Field of View Calculator
Field of view for different focal lengths and sensor sizes
Optimal Aperture Calculator
Optimal aperture for macro photography, accounting for diffraction
Effective Aperture Calculator
Bellows factor and exposure compensation for macro work
Flash Photography
Specialised calculators for flash lighting and light control
Flash Distance for Close-ups
Optimal flash distance for macro and close-up photography
Open Flash Calculator
Number of flashes needed for the open-flash (painting with light) method
Optics & Depth of Field
Calculators for optical math and depth-of-field planning
Depth of Field Calculator
Optimal aperture for the depth of field you want
Magnification Calculator
Magnification ratio from focus distance and focal length
Close-up Lens Calculator
Magnification and depth of field with close-up filters
Depth of Field & Magnification
Combined calculation of depth of field and magnification
Pinhole Diameter Calculator
Optimal pinhole diameter for camera obscura builds
Color & White Balance
Tools for color temperature correction and white balance
Projection & Presentation
Calculators for image projection and presentation planning
Business & Pricing
Calculators for the business side of photography and pricing
Clear, correct, free.
These tools are not marketing add-ons. They grew out of real assignments, are maintained continuously and follow clear mathematical standards. Four points that make the difference.
Formulas built on optical standards.
Every calculation is based on established optical formulas and photographic standards – no guesses, no rules of thumb.
Designed for the field, not just the desk.
Phone, tablet, desktop – every calculator runs smoothly on any device. Ideal for use right where you are shooting.
No login, no install.
Open, enter, calculate. No sign-up, no tracking cookies, no ad interruptions.
By a photographer, for photographers.
Built out of real situations from my own assignments – with clear explanations and notes on how to actually use them.
Where they help in everyday work.
Three genres where these calculators save the most time or push image quality the furthest – with the right tools from the library matched to each one.
Plan hyperfocal, expose cleanly.
- ◆Depth of field calculator for hyperfocal distance
- ◆Exposure value calculator for exposure planning
- ◆Aperture-stops calculator for ND filters
Precision in the close-up range.
- ◆Magnification calculator
- ◆Flash distance for close-ups
- ◆Close-up lens calculator for diopter filters
Bokeh, light & studio setup.
- ◆Depth of field for background blur
- ◆Open flash calculator for studio setups
- ◆Color temperature for mixed-light scenes
Answers to the usual questions.
Photography grounded. Learning with practice.
Calculators are the toolset, the blog goes deeper into the theory and the 1:1 coaching sessions translate everything into your own hands. Pick whatever moves you forward right now.