Split Bill Calculator by Percentage

Give each person a percentage and see what that comes to in money.

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People
2
Each person's percentage

Percentages are scaled to the whole bill, so they do not have to add up to exactly 100.

Largest share

$0.00

Enter the bill and a percentage for each person.

    Tax and tip are split in the same proportion as the bill, so the person paying 70% of the food also carries 70% of the tax and the tip.

    How this page works it out

    Three pictures of the same calculation, using a bill of 84.00 with 8% tax, an 18% tip and a 60/40 split.

    A bill of 84.00 plus 8 percent tax and an 18 percent tip comes to 105.84, which is then divided 60 / 40 A bill of 84.00, with 8% tax and an 18% tip, is 105.84 Bill 84.00 Tax 6.72 Tip 15.12 105.84 Divided 60 / 40 — the proportions apply to the whole 105.84, not only to the food 63.50 42.34 Person 1 · 60% Person 2 · 40%
    Tax is charged on the food and the tip is left on the food, so both belong to the same proportions as the bill. The 60% person carries 60% of all three — that is why the two amounts at the bottom add up to 105.84 and not to 84.00.
    Percentages of 50 and 30 that add up to 80 still produce the same bar, relabelled as 62.5 and 37.5 percent You type 50 and 30 — they add up to 80, not 100 The page applies 62.5% and 37.5% of the bill The bars are identical. The proportions never changed — only the label did.
    Nothing breaks when your percentages miss 100. Each one is divided by the total you entered, so 50 and 30 behave exactly like 62.5 and 37.5. The applied figure is printed next to each name so you can see what actually got used, and a warning line tells you the total is not 100.
    The rounding step: 63.504 and 42.336 are rounded down, leaving one cent which goes to the largest remainder 105.84 divided 60 / 40, rounded to the cent 105.84 × 60% 63.504 → 63.50 105.84 × 40% 42.336 → 42.33 63.50 + 42.33 105.83 105.84 − 105.83 0.01 left over 42.33 + 0.01 42.34 63.50 + 42.34 105.84 ✓
    Rounding each share on its own would leave the column a cent short, and somebody has to absorb that. This page rounds every share down, then hands the leftover cents to the shares with the biggest remainders — so the amounts add back up to the penny. Note that the cent went to the 40% share here, because .6 is a bigger remainder than .4: the rule is largest remainder, not largest share.

    Questions people ask about splitting a bill by percentage

    How do I split a bill by percentage?

    Enter the bill, then give each person a percentage. The page turns those percentages into money. The percentages are scaled to the whole bill, which means two things: 60 and 40 give the same answer as 6 and 4, and your numbers do not have to land on exactly 100 — if they add up to 80, each person's share is still worked out from their proportion of that 80, and the effective percentage is shown next to their name.

    What percentage should each person pay?

    There is no formula, because a percentage split is an agreement rather than a calculation. What the percentage is standing in for decides it: if it stands in for what each person consumed, a rough guess at the ratio of what they ordered is fair enough; if it stands in for what each person can afford, use their share of the combined take-home pay; if it stands in for what each person agreed to, write down what you agreed. The one thing a percentage split cannot do is be exact about consumption — for that you need an itemised split, which is a different calculation.

    Should tax and tip be split by the same percentage?

    Yes, and that is most of the point of splitting by percentage. Tax is charged on the food and tip is left on the food, so both belong to the same proportions as the bill itself. This page applies each person's percentage to the tax and the tip as well as to the subtotal, so the 70% person carries 70% of all three. The common mistake is to split the food by percentage and then split the tax evenly — which quietly moves money from the lighter eater to the heavier one, and the smaller the share, the more it stings.

    What if my percentages do not add up to 100?

    Nothing breaks. The page divides each person's percentage by the total you entered, so the shares are always in the proportion you typed. Enter 50 and 30 and the total is 80, which becomes 62.5% and 37.5% of the bill — the effective figure is printed next to each name so you can see what actually got applied. If that is not what you meant, the warning line above the breakdown tells you the total is not 100, and Set equal puts everyone back on an even split.

    How do I split a bill 60/40?

    Leave People at 2 and type 60 in the first box and 40 in the second. On a bill of 84.00 with 8% tax and an 18% tip the tax is 6.72 and the tip is 15.12, so the amount being divided is 105.84 — and 60/40 of that is 63.50 and 42.34. Those two figures add back up to 105.84 exactly, because the leftover cent from the rounding goes to the share with the biggest remainder rather than being dropped. Note that it went to the 40% person here, not the 60% one: the rule is largest remainder, not largest share.

    How do I split a bill three ways with different percentages?

    Press + once so People reads 3, then enter a percentage in each of the three boxes — 50, 30 and 20 will do to see how it behaves. On a bill of 150.00 with no tax or tip that is 75.00, 45.00 and 30.00. The page also prints the most and the least anyone pays and the gap between them, which is usually the number people actually argue about.

    Why do the amounts not add up to the total exactly?

    Sometimes they will not, on their own, because a percentage of a cent is not a whole cent. This page rounds each share down to the cent and then hands the leftover cents out to the shares with the biggest remainders, so the column adds up to the amount being divided to the penny. The breakdown shows a tick next to "shares added back up" when it matches. Without that step you would get a row of figures that is a cent or two short, and somebody has to pay the difference.

    Is splitting by percentage the same as splitting by income?

    No, although they look alike. Splitting by income is a rule that produces the percentages for you: it divides the bill in proportion to each person's take-home pay, so the numbers are not a choice. Splitting by percentage is the manual version — you decide the numbers and the page does the arithmetic. If you want the income rule to pick the percentages, the income split calculator on this site does that; if you already know the percentages you want, stay here.