We can officially convert to Buddhism by reciting the Three refuges below. After that, we work to follow the Buddha and his teachings as carefully as we can.

Buddhaṃ saranaṃ gacchāmi.
Dhammaṃ saranaṃ gacchāmi.
Sanghaṃ saranaṃ gacchāmi.

Dutiyam’pi Buddhaṃ saranaṃ gacchāmi.
Dutiyam’pi Dhammaṃ saranaṃ gacchāmi.
Dutiyam’pi Sanghaṃ saranaṃ gacchāmi.

Tatiyam’pi Buddhaṃ saranaṃ gacchāmi.
Tatiyam’pi Dhammaṃ saranaṃ gacchāmi.
Tatiyam’pi Sanghaṃ saranaṃ gacchāmi.

I go for refuge to the Buddha.
I go for refuge to the Dhamma.
I go for refuge to the Sangha.

For the second time I go for refuge to the Buddha.
For the second time I go for refuge to the Dhamma.
For the second time I go for refuge to the Sangha.

For the third time I go for refuge to the Buddha.
For the third time I go for refuge to the Dhamma.
For the third time I go for refuge to the Sangha

A note on pronunciation: The ṃ is pronounced link an ng. The ā is drawn out.