# Rent Split Calculator

URL: https://speedycalculator.com/calculators/everyday-life/rent-split/
Last updated: 2026-10-25

> The rent split calculator divides rent between roommates either equally or in proportion to bedroom size, so people with larger rooms pay a fair share more.

## Inputs

- Total rent
- Your room size (m², ft², cm², in², yd², acre, ha)
- All bedrooms combined (m², ft², cm², in², yd², acre, ha)
- Number of roommates
- Share of rent for common areas (%)

## Results

- Your share
- Equal split

## Formula

```
Share = rent × (shared share ÷ people + private share × room area ÷ total room area)
```

## Explanation

Splitting by room size is a common way to keep shared housing fair. Shared spaces are split equally.

### How to use the Rent Split Calculator

- **Total rent**
- **Your room size**
- **All bedrooms combined**
- **Number of roommates**
- **Share of rent for common areas**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Part of the rent covers shared areas and is split equally; the rest is split by bedroom area.

### Tips

- Use the figures from your own bills and product labels – prices and appliance ratings vary widely.
- Look at yearly totals: small daily costs add up and make it easier to compare options.
- Round quantities up to whole packs, rolls or bulbs when you shop.
- Re-check the numbers when prices change; most results scale directly with the unit price.

### Common mistakes to avoid

- Confusing watts (power) with watt-hours or kilowatt-hours (energy).
- Comparing prices without bringing them to the same unit first.
- Ignoring one-off costs such as installation, delivery or replacement parts.

### Inputs explained

FieldWhat to enterTotal rentAmount in your currencyYour room sizeUnits: m², ft², cm², in², yd², acre …All bedrooms combinedUnits: m², ft², cm², in², yd², acre …Number of roommatesA numberShare of rent for common areasIn %

### What each result means

- **Your share** = [Total rent]×([Share of rent for common areas]÷100÷[Number of roommates] + (1 - [Share of rent for common areas]÷100)×[Your room size]÷[All bedrooms combined])
- **Equal split** = [Total rent]÷[Number of roommates]

### Example values

How the main result changes when **Total rent** changes and everything else stays at the example values above:

Total rentYour share1,2004401,8006602,4008803,0001,1003,6001,3204,8001,760

## Worked example

Inputs — Total rent: $2,400; Your room size: 14 m²; All bedrooms combined: 36 m²; Number of roommates: 3; Share of rent for common areas: 40 %.

Results — **Your share = $880.00**; Equal split = $800.00.

## FAQ

**What share for common areas?**
Many groups use 30–50%; agree on it together.

**Should private bathrooms count?**
Add a premium for en-suite rooms if everyone agrees.

**What formula does the Rent Split Calculator use?**
Share = rent × (shared share ÷ people + private share × room area ÷ total room area).