# Rent split calculator for a couple and single roommates

Canonical URL: https://www.evenoutapp.com/tools/rent-split-calculator-for-a-couple
Updated: 2026-10-06

Give the couple a weight from 1 (one person) to 2 (two people) and add it to the number of single roommates. Divide the rent by that total for each single's share, and multiply by the weight for the couple's. On $3,500 with one couple and two singles at 1.5, the couple pays $1,500 and each single $1,000.

Key points:
- Units = couples × weight + singles. A single pays rent ÷ units and a couple pays rent × weight ÷ units.
- Weight 1 is one share per room and weight 2 is one share per person. On $3,500 with two singles, the couple pays $1,166.67, $1,500 or $1,750 at weights 1, 1.5 and 2.
- Each partner pays half of the couple's amount, which at weight 1.5 is 75% of what a single roommate pays.
- The check line adds every payment and equals the rent, with any spare cent handed to one person.

## When should you use this calculator?

Use it when a couple shares a bedroom and the household has not yet agreed how many people that counts as. One setting, the weight of a couple, runs from 1 (the couple is one tenant) to 2 (the couple is two people), and any value in between is a compromise. The reasoning behind each choice is in [how to split rent with a couple](https://www.evenoutapp.com/guides/how-to-split-rent-with-a-couple).

## How does the calculator work?

It turns everyone into units and divides the rent by the total. A couple counts as the weight you choose and each single roommate counts as 1.

1. **Units** = couples × weight + singles.
2. **Each single pays** rent ÷ units.
3. **Each couple pays** rent × weight ÷ units, and each partner pays half of that.
4. **The check** adds every payment and shows that it equals the rent.

Say the rent is $3,500 with one couple and two single roommates, and the weight is 1.5. Units are 1 × 1.5 + 2 = 3.5. Each single pays $3,500 ÷ 3.5 = $1,000. The couple pays $3,500 × 1.5 ÷ 3.5 = $1,500, which is $750 for each partner. The three amounts, $1,500 + $1,000 + $1,000, come to $3,500.

At weight 1.5 each partner pays 1.5 ÷ 2 = 75% of a single roommate's amount. The last line of the calculator shows that percentage for whatever weight you enter.

## What does the weight change?

The weight is the only dial, and it moves money between the couple and the singles. These are the same $3,500 with one couple and two singles at three settings.

| Weight | Couple pays | Each single pays | Couple's share of the rent |
|---|---|---|---|
| 1 | $1,166.67 | $1,166.67 or $1,166.66 | 33.3% |
| 1.5 | $1,500 | $1,000 | 42.9% |
| 2 | $1,750 | $875 | 50% |

At weight 1 the rent does not divide into whole cents, so the amounts are $1,166.67, $1,166.67 and $1,166.66, and they still total $3,500. The calculator shows amounts of $1,000 or more in whole dollars, so it reads $1,167 here. Going from weight 1 to weight 2 moves about $583 onto the couple, which is about $292 off each single roommate.

## What if there is more than one couple?

The same weight applies to every couple. Say the rent is $4,000 with two couples and one single, at weight 1.5. Units are 2 × 1.5 + 1 = 4, so the single pays $4,000 ÷ 4 = $1,000 and each couple pays $4,000 × 1.5 ÷ 4 = $1,500. The calculator takes up to three couples and up to four singles.

## What mistakes should you avoid?

- **Treating an overnight guest like a tenant.** A partner who stays a few nights a week is a different case from a couple who both live there. [Should a roommate's partner pay rent](https://www.evenoutapp.com/guides/should-a-roommates-partner-pay-rent) covers it.
- **Setting the weight after the first bill.** Agree it before anyone pays, and write it next to the rent amount.
- **Ignoring a large income gap.** When incomes differ more than the bedrooms do, use the [rent split calculator by income](https://www.evenoutapp.com/tools/rent-split-calculator-by-income) and enter the couple's combined income as one person.

## How do you record it in EvenOut?

Add the rent to a Household group with both partners and the single roommates as members. Choose Shares in the split picker and type 3 for each partner and 4 for each single roommate, which is the 0.75 to 1 ratio that weight 1.5 gives. The sheet shows $750 under each partner and $1,000 under each single. Set Repeat to Monthly and EvenOut adds each later month with the same payer and split. When the weight changes, stop the repeat and add the new amounts. For other ways to divide the same rent, [how to split rent fairly](https://www.evenoutapp.com/guides/how-to-split-rent-fairly) compares four methods.

## Frequently asked questions

### What weight should a couple count as?

There is no correct number, only the one your household agrees on. Run 1, 1.5 and 2 on your own rent and compare the gaps. If two people use the kitchen and bathroom, a weight nearer 2 reflects that. If they take one bedroom, a weight nearer 1 does.

### How do I charge extra when the couple has the bigger room?

Take the premium off the top first. For a $100 premium on $3,500, enter $3,400 as the rent, then add $100 to the couple's result. At weight 1.5 that is $1,457.14 + $100 = $1,557.14 for the couple, and $971.43 for each single.

### Can the same weight cover rent and bills?

Yes. Enter the rent plus the fixed bills as one total. Costs that rise with use, like electric and water, may deserve a higher weight than a flat internet plan. Run each bill with its own weight and write the weights down.