The 5-string kantele is usually tuned like this:
(The pitch may vary according to the size of the kantele and the player´s preference)

The 10-stringed kantele is usually tuned like this:

Rarely however is the kantele tuned so high. The key-note is determined by the 4th string.
The usual custom is to tune the kantele between a -d2, when the key is D major. The key-note is usually c1-e1 (according to the kantele, its size and the thickness of the strings).
For example.

Tuning of the Perho River Valley kantele to C major (the 36-string kantele):

Here is the same in the minor key:

In the box kantele of the Perho River Valley (20-36 strings) the tuning
is generally raised to a higher pitch (D major).Tunes have been played with
kantele and violin harmonizing best in D major.
Tuning the 36-string kantele diatonically:

Tuning the 38-string concert kantele:

Example of tuning the smaller 29-string kantele:
(Laasanen-model)

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