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## IF Function

Occasional Visitor

# IF Function

I'm looking to write an equation / function for a lavatory fixture count which will allow calculations below the lowest divisor value.

1 LAV / 40 occupants for the 1st 80 occupants;
1 LAV / 80 occupants thereafter.

This equation will not work if I have less than 80 occupants:

=IF(D26>80,(D26-80)/80+80/40), where cell D26 = number of occupants.

Any suggestions?

# Re: IF Function

= IF( occupants < 80, occupants/40, 1 + occupants/80 )

Since occupants is a single value rather than a list of alternatives, you could also have

= MIN( occupants/40, 1 + occupants/80 )

Either way, to avoid partial fixtures, you will need to round up, giving

= CEILING( IF( occupants < 80, occupants/40, 1 + occupants/80 ), 1 )

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