How do you split the electricity bill between room tenants?
Split the bill by nights: each tenant pays the share of the bill that matches their share of all tenants' nights combined. A tenant who moved in mid-month pays less. Enter the bill total and each person's nights; shares are rounded to the sen and always add up exactly to the bill.
- Room 1, 30 nights
- RM 133.34
- Room 2, 30 nights
- RM 133.33
- Room 3, 12 nights
- RM 53.33
- Total
- RM 320.00
How does this calculator work?
One person's share = bill total x that person's nights divided by everyone's total nights. Each share is rounded down to the sen, and the leftover sen are given one at a time to the shares closest to rounding up, so the total matches the bill.
Frequently asked questions
By nights is fairer when tenants move in or out partway through the billing period, because someone who stayed half the month pays half a share. Equal shares suit a period when everyone stayed throughout.
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