Private bathroom
Estimate a visible premium for a private full bath or half bath, then copy an explanation that keeps the bathroom assumption separate from room size.
One common way to calculate this is to start with a room-size split, then add a fixed monthly premium for the room with meaningful private bathroom access.
The premium should stay visible because it is an agreement assumption, not a hidden formula. In this calculator, the added premium is offset across the other rooms so the displayed totals still add back to the total rent.
A private full bath usually has more value than a private half bath because it includes shower or bath access. A half bath may still matter, but the premium is often lower.
Use different dollar amounts when the rooms have different bathroom setups. If the bathroom is attached to the room, larger, newly renovated, or rarely used by guests, the group may agree to a higher premium.
A bathroom premium may need to be reduced if guests, other roommates, or common-area traffic regularly use that bathroom. The same applies if it is inconvenient, very small, or not meaningfully private.
Keep those details in the explanation so roommates can discuss the assumption directly instead of arguing about a mysterious final number.
There is no universal amount. A fixed monthly premium is usually easier to explain than hiding the bathroom value inside square footage. Start with a small visible amount, then adjust if the group agrees the bathroom has more or less value.
Bedroom square footage and bathroom access are different assumptions. Keeping the premium separate makes it easier to explain why a room pays more.
If the bathroom is meaningfully private and only one room uses it, a premium may make sense. The exact amount should still be an agreed assumption, not a hidden rule.
If other people regularly use it, the bathroom may not be fully private. Consider reducing the premium or treating it as a shared feature.
Usually yes. A half bath can still add convenience, but a full bath normally has more value because it includes bathing or shower access.
Share the total rent, the base split, the bathroom type, the monthly premium, and a note that the result is a discussion aid based on entered assumptions.