ClarityHow to use this tool
- Enter total rent, your room area, total private room area, number of tenants, share split equally.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
Input reference and sample values
Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.
| Input | Format and units | Sample |
|---|---|---|
| Total rent | Numeric value. Unit: money. Zero or positive. | 2000 |
| Your room area | Numeric value. Unit: m². Must be greater than zero. | 15 |
| Total private room area | Numeric value. Unit: m². Must be greater than zero. | 40 |
| Number of tenants | Whole numbers only. Minimum: 1. Maximum: 100. | 3 |
| Share split equally | Numeric value. Unit: %. Zero or positive. Maximum: 100. | 50 |
Result for these sample inputs
708.333333 currency units
Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.
The method, explained
Your share = rent × [equal fraction/tenants + (1 − equal fraction) × room area/total room area].
For total rent of 2,000, three tenants, a 15 m² room and 40 m² of total private room area, split 50% equally and 50% by room size. Your share is 1,000 ÷ 3 + 1,000 × 15 ÷ 40 = 708.33, rounded to two decimals.
Understanding your result
Enter total private room area, not the whole apartment including shared spaces. A 100% equal share divides rent evenly; 0% allocates it entirely by room area. This is a comparison method for discussion, not a determination of what any tenant owes.
What to keep in mind
A scenario calculation using your inputs, before unlisted fees or taxes. It is not a quoted product rate or personalized recommendation.
Common questions
Should shared rooms count in the room-area total?
Use only the private room areas being compared. The equal-share percentage is how this model accounts for the shared portion of rent.
Can I use square feet instead of square metres?
The calculation uses a ratio, so it gives the same result if both area values use the same unit. Never mix square feet with square metres.
Will rounded shares always add up exactly?
Rounding individual shares may leave a small remainder. Check the total and agree how to allocate the remaining smallest currency unit.
Methodology maintained by ClarityKit. How these tools are built and checked.