Allowance Calculator
Short answer
There is no reliable national average allowance to copy, so this calculator works the other way around: you list what the allowance is meant to pay for, it adds it up, and it adds a savings share on top. The number that comes out is defensible, because you can show your teenager exactly where it came from.
$0.00 a week
Nothing here is stored or sent anywhere. Set a category to zero if you keep paying for it yourself.
Why this works backwards from the usual calculator
Most allowance calculators are really lookup tables: pick an age, get a figure. The figures behind them are subscriber data from companies that sell allowance apps, and how much allowance for a teenager takes that apart properly.
This one skips the lookup. You put in what the allowance is expected to pay for, it converts the monthly lines to weekly, and it sizes the savings share so that the percentage you set is the share of the final number. The output has a reason attached, which is the only property that survives a negotiation.
How to use it in an actual conversation
Fill it in with them, not before the conversation. Two things tend to happen when you do.
The first is that the total surprises everyone, usually upward. Small weekly amounts and monthly subscriptions do not feel like money until they are stacked in one column.
The second is more useful. When the fields are on screen and your teenager can see which line produced which number, the request changes shape. They stop asking for a bigger figure and start pointing at a field. Arguing about a field is a solvable problem.
What it looks like
Maya is seventeen, has been driving for a year, and has just taken over her own clothes. The figures here are illustrative. Her parents fill the fields in with her: gas at about twenty dollars a week, food out at about twelve, clothes at sixty a month now that the category has moved to her, one subscription at ten a month, and fifteen dollars a week that is hers with no strings attached. They set the savings share to ten percent rather than fifteen, because the gas line is not optional and there is less slack in this budget than there was two years ago.
The calculator converts the two monthly lines to weekly, adds everything up, and lands a little over seventy dollars a week, which it also shows as roughly three hundred a month. About seven dollars of that weekly figure is the savings line.
Seventy is a much larger number than her parents had in their heads, and none of it is discretionary except the fifteen. That is the useful part. The gas is what it is, and once it is on screen next to everything else, the conversation about whether she drives to school every day becomes a conversation about money rather than about attitude.
The savings share, and why it goes on top
Adding savings on top rather than carving it out of the total is a small structural choice that matters more than it looks.
If you hand over sixty three dollars and then ask for seven of it back, the seven feels like a loss, because the sixty three was already theirs. If the number is seventy and seven of it is labelled as saving from the moment they see it, there is nothing to lose. It is the same arithmetic and it does not feel like the same arithmetic, which is why the calculator grosses the total up rather than slicing it.
You can see what that share turns into over time with the compound interest visualiser. For a teenager, the number at the end is usually the most persuasive thing on this site.
When to run it again
Put a reminder in for the same week every year, and open the tool again any time a category appears or disappears. Passing a driving test, taking over the clothes budget and starting a job all change the answer, and they rarely happen at a convenient moment.
The failure mode is not setting the wrong number. It is setting a reasonable number at thirteen and then never opening the question again, so that a sixteen year old is being funded for a life they stopped living some time ago.
If they get a job, the whole thing changes shape, and it is worth reading why the first paycheck is smaller than expected before you renegotiate, because their idea of what they are about to earn is usually wrong.
Common questions
Why does this calculator not have an "average for my child's age" setting?
Because there is nothing honest to put in it. The published benchmarks are subscriber data from companies selling allowance apps, and the reasons that matters are set out at length in how much allowance for a teenager. This tool is the other half of that argument: a way to build a number instead of copying one.
Should the allowance be tied to chores?
That is a separate decision and a genuinely contested one. See paying kids for chores for both sides. This calculator works either way, because the amount and the conditions are different questions.
What savings percentage should I use?
Ten to twenty percent is a common starting point and there is nothing magic about it. What matters more is that the savings share is included in the number from the start, rather than being asked for out of money the teenager already considers spent.
Does this store anything?
No. It runs in your browser. Nothing is sent anywhere, nothing is saved, and there is no sign-up. Reload the page and it is blank again.