[betaPhoto]

This chart may help if you can understand how to read it; (The green and red values show 2 example calculations).

Start with an EV, then slide to the right and pick an fStop, then slide up and pick a shutter speed and finally, slide to the left and and you see the needed ISO, also you could go in reverse to find what EV you are shooting in.

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[simico]

Can this be used? If you have Android... Exposure Calculator - Android

I use PHOforPHO on Android

[jolepp]

Thank, comes in very handy.

What is to be considdered as dark or low light situation?

IMO, below EV 3-4 is "low", below that "dark". Rationale being that for something like the k-x / K-5 EV 3-4 is where one can still get decent quality handheld snaps but going below that would need tripod / flash (or >= ISO 6400 ).

[Tommot1965]

You can use my Excel calculator, here:
http://www-user.uni-bremen.de/~wie/EV.xls

thanks for that mate..rep added

[Tommot1965]

This chart may help if you can understand how to read it; (The green and red values show 2 example calculations).

Start with an EV, then slide to the right and pick an fStop, then slide up and pick a shutter speed and finally, slide to the left and and you see the needed ISO, also you could go in reverse to find what EV you are shooting in.

good chart, easy to read, easy to understand..rep added

[GrinMode]

I use PHOforPHO on Android

Thanks for this

[lavascript]

Crap! I've had it wrong! I always use the f1/1sec/ISO100 rule to do figuring in my head if I need to, but I thought that represented EV1. I've been 1EV off all this time.