Shared-rent split calculator
Weights make a larger room or private bathroom explicit without pretending there is one universal fair split.
Person A share
800.00
- Person B share
- 960.00
- Person C share
- 640.00
- Equal one-third share
- 800.00
Show the working
- Total monthly rent = 2400
- Person A room weight = 1
- Person B room weight = 1.2
- Person C room weight = 0.8
- total_weight = 1+1.2+0.8 = 3
- Person A share = 2400*1/3 = 800
- Person B share = 2400*1.2/3 = 960
- Person C share = 2400*0.8/3 = 640
- Equal one-third share = 2400/3 = 800
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- person share = total rent x person weight / sum of weights
Agree the weights together; the calculator only applies them consistently.