How this calculator works
This calculator divides a bill between people by percentage share instead of splitting it evenly. Use it when people ordered different amounts, earn different incomes, or agreed to cover different shares of rent, a trip or a gift.
Each person pays the total multiplied by their percentage as a decimal. For the split to be complete, everyone's percentages should add up to 100%.
Worked example: a $180 dinner split 50%, 30% and 20%
- Person A: 180 × 0.50 = $90.
- Person B: 180 × 0.30 = $54.
- Person C: 180 × 0.20 = $36.
- Check: 90 + 54 + 36 = 180. ✓
The shares are $90, $54 and $36.
Quick reference: shares of a $1,000 bill
| Share | Amount |
|---|---|
| 10% | $100 |
| 20% | $200 |
| 25% | $250 |
| 33.33% | $333.30 |
| 40% | $400 |
| 50% | $500 |
Common mistake
Shares that don't add up to 100%. If they total 90%, someone has to cover the missing 10%. The calculator warns you when the shares don't add up.
Questions people ask
- Why is the total off by a cent?
- Each share is rounded to the nearest cent. Three equal shares of $100 come to $33.33 each, which adds up to $99.99, so one person can pay the extra cent.
- How do I split a bill by income?
- Divide each person's income by the combined income to get their share. If one earns $3,000 and the other $2,000, the shares are 60% and 40%.
- How do I split an even share?
- Divide 100 by the number of people. For four people, each share is 25%.
Learn more
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