Google-sheet IF function not working

I need a formula in Google spreadsheet that will:

• +1 when the value is >=5,
• +2 when the value is >=10,
• +3 when the value is >=15,
• +4 when the value is >=20,
• +5 when the value is >=25

The formula I am currently using is:

=IF(F7>=5,H7+1,IF(F7>=10,H7+2,IF(F7>=15,H7+3,IF(F7>=20,H7+4,H7))))

This formula is working for the +1 when the value is >=5, but when the value is >=10,15,20,or 25 it is still only adding +1.

Please Help!