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HoldingCost

Kids saving goal calculator

Work out how many weeks of allowance you need to save for something you want.

Calculator personal

Logic updated April 2026

This calculator tells you how many weeks it will take to save up for something you really want, based on your weekly pocket money and how much of it you put aside. It's deliberately simple — no interest, no fancy maths. Just clear numbers showing the path from where you are today to having enough.

How this is calculated

Formula 

weeklySavings = weeklyAllowance × savingsPercent / 100 ; weeksToGoal = (goalAmount − currentSavings) / weeklySavings (rounded up)

Step-by-step

  1. Multiply your weekly allowance by the savings percentage to find how much you save each week
  2. Subtract what you already have from your goal to find how much more you need
  3. Divide that gap by your weekly savings to find how many weeks until you reach the goal
  4. Round up to whole weeks because part-weeks don't count — you're either there or not
  5. Convert the weeks into months (52 weeks ÷ 12) so you can think in months too
Rounding mode
ROUND_HALF_UP
Precision
20-digit internal precision (Decimal.js), rounded to 2 decimal places for display
Logic last reviewed

Assumptions & limitations

What this calculator assumes

  • No interest or growth — a child-friendly, linear model
  • Money is saved at the start of each week
  • Weeks are rounded up to whole weeks
  • Months are derived from weeks via 52/12 weeks per month
  • Projection is capped at 260 weeks (5 years)

What this calculator doesn’t account for

  • Doesn't include interest from a savings account (use the pocket money growth calculator for that)
  • Doesn't account for getting extra money on birthdays or holidays
  • Doesn't model weeks when you might save less or more
  • Doesn't track if you spend some of your savings on something else
  • Assumes the goal price stays the same — real items can change in price

Worked example

A child wants to save $150 for a new bike. They get $15 a week in pocket money, already have $30 saved, and decide to put aside half of their weekly allowance.

Input Value
Goal $150
Current savings $30
Weekly allowance $15
Savings percent 50%

Weekly savings: $7.50 — Weeks to goal: 16 — Months to goal: ~4

Each week you save $7.50 (half of $15). You need $120 more ($150 − $30 already saved). $120 ÷ $7.50 = 16 weeks. That's about 4 months. If you saved 75% of your allowance instead, you'd save $11.25 a week, and the goal would arrive in about 11 weeks — about a month sooner.

Frequently asked questions

How do I save up for something I want?

Decide what you want and how much it costs. Then figure out how much you can put aside each week — even a small amount works. Stick to it every week. The calculator shows how long it'll take so you don't have to wonder. The biggest secret to saving is consistency — saving $5 every week is more powerful than saving $20 some weeks and nothing other weeks.

What if it takes too long?

There are three things you can do: save more each week (a bigger percentage of your allowance), find ways to earn extra (extra chores, a small job, selling things you don't use), or pick a slightly cheaper version of what you want. Try changing the numbers in the calculator — you'll see how each lever changes the answer. Saving an extra $5 a week often shaves weeks off the time.

Can I save faster?

Yes — and the calculator helps you see how. Increase the savings percent (save more of each pocket-money payment) and the weeks-to-goal drops. Add bonuses you might get (a gift card, allowance boost) to your current savings. Even adding $20 to your starting balance can shorten the wait by a couple of weeks.

Why is it worth waiting?

Two reasons. First, when you save up for something instead of asking for it, you really know how much it cost — that's a useful skill for life. Second, the wait makes the thing more special when you finally get it. Most adults will tell you the things they saved up for as kids are the ones they remember the longest.

What if I get extra money along the way?

Bonus money — birthday gifts, helping with extra chores, finding coins around the house — all goes straight onto your balance. Add it to your current savings and re-run the calculator. Surprise money usually shaves real time off the goal. Some kids set a rule: 50% of any unexpected money goes straight to the savings goal, the rest is for fun.

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