Exposure Calculator is an iOS application for photographers to convert and calculate different exposure settings.

Longtime Exposures:
Exposure Calculator helps you to find the correct settings for your longtime exposures.
If your camera doesn't have a timer for longtime exposures, just use Exposure Calculator's built-in timer.

Shutter, Aperture, ISO:
No matter which parameters you want to use: Exposure Calculator calculates the remaining target value for you.

ND Filters:
Exposure Calculator helps you to find the correct settings when using ND filters.

Built in timer for calculated exposure times greater than 2 seconds.

Push Notifications:
For very long exposure times, ExpoCalc can remind you with a push notification that the timer approaches the end.

You can configure Exposure Calculator to meet the capabilities of your camera. Choose which ND filters you own and let Exposure Calculator display only those to keep the list clear. Choose between multiple color themes, dark and light mode.

What’s New

Version 2.9

Fixed a calculation bug on some ND filters

Ratings and Reviews

3.1 out of 5
9 Ratings

9 Ratings

mrdisco ,

gets you close

I am doing long exposure photography where I add a ton of ND filters, and need to calculate the new exposure time. This gets me close but there are a number of shortcomings: no partial f-stops like f9, no limited shutter speeds, and it would be nice if it had an ability to add x% to the total exposure time to compensate for ND over 10 stops. In an app market where the competition is terrible to non-existent, it's about as good as you're going to get, which is about a 3 star app

BigBadChewbacca ,

Fantastic Field App!!

This app is wonderful for calculating long exposures using ND filters. It is not data dependent so you can use it when in remote areas and I have found it to be 100% accurate after using it for a few months now.
I use it for landscapes, cityscapes, and astro-photography.
You simply select which ND filter you own from the settings tab then select which ones your using for the shot and it does all the math for you. No stop limit, and you can also select color themes which is nice depending on if you’re shooting during day or night.

Aorr ,

Perfect for what I was looking for

This app is perfect for large format cameras. Take a reading using a light meter, or even a digital camera. See what the exposure is that you get, input it into the app and then adjust your aperture to get the new shutter speed you’ll be shooting at. Easy and very customizable.


Mario Zimmermann
11.6 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, German

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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