Extreme money-math: “even plus/minus amount”

Working tirelessly alongside a team of top Caltech scientists, we have cracked the split-bill problem. You can now specify your participation as “even plus/minus amount.”

As any experienced restauranteer can attest, it sounds so simple to say “Jill will cover for Joe, Bob will pay $10 more because he got the lobster, and Joey owes $3.50,” but calculating this frightening mess of shifting averages and combined totals is not just a nightmare, but is also demonstrably impossible. Or so said conventional wisdom.

Our new money-math engine makes this sort of problem a thing of the past. Tell us how you think shared bill ought to be split:

  • Even
  • Evenly, but paying for multiple people
  • Even plus/minus amount (new!)
  • Fixed

…and we’ll do the work for you.

split_plus_minus.png

(Can you identify the obvious falsehood in the above image?)

7 Responses to “Extreme money-math: “even plus/minus amount””

  1. Matt Says:

    So when are we getting the line item interface🙂

  2. Garry Huang Says:

    Falsehood? Hmm. I know! The picture is that of Bill Gates, not Gaurav! hur hur.

    But seriously, nicely done! I think Billmonk might be appearing in the local papers in Singapore soon! Keep your fingers crossed😉

  3. Stephen Mok Says:

    How about splitting by percentage?

    e.g. We buy a group birthday present for someone, but one friend is stinking rich and offers to pay 50% of the whole thing with the rest to be split evenly between the remaining friends.

    This would be very easy to do if I could put in a 50% split for the rich guy and let BillMonk work out what is the even split for the rest.

  4. Arthaey Angosii Says:

    How about fixed amount + another fixed amount?

    This came up when a bunch of us took a friend out to dinner for his birthday. Everyone paid for their own meals separately (a fixed amount, because the meal prices varied quite a bit), plus everyone had added to their total the amount of tax, tip, and the birthday boy’s meal, divided evenly. In order to BillMonk that, we had to open up Excel.😦

  5. Austin Storm Says:

    Boy, and I thought BillMonk already gave me a lot of options! Way to go, guys…

  6. The AV Club Blog » Blog Archive » BillMonk: You Owe Me $ Says:

    […] Today Boing Boing pointed me to an awesome new web service that is so damn useful i can’t even tell you enough to go join. BillMonk is a site that lets you track who owes who for what- it is a wet dream for us at the Beach Haus, because doing the math on bills between four people is crazy annoying. What you do is sign up (very basic info required) and have the people you owe/who owe you sign up too, and it tracks debts, loans, and possessions between you. It even does really crazy splitting math if you want: As any experienced restauranteer can attest, it sounds so simple to say “Jill will cover for Joe, Bob will pay $10 more because he got the lobster, and Joey owes $3.50,” but calculating this frightening mess of shifting averages and combined totals is not just a nightmare, but is also demonstrably impossible. Or so said conventional wisdom. Our new money-math engine makes this sort of problem a thing of the past. […]

  7. Randell Shilt Says:

    This was really an attention-grabbing matter, I am very lucky to be able to come to your blog and I will bookmark this page in order that I could come again another time.

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