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Hndy Tools

Money Change Calculator

Find the minimum number of banknotes and coins needed to make change

Calculator
Finance
$
$

About This Tool

The Money Change Calculator finds the optimum minimum number of banknotes and coins needed to make any amount of change. Using a greedy algorithm, it starts with the largest available denomination and works down to the smallest, ensuring the fewest total pieces. This is the same logic used by cash registers and ATMs worldwide.

You can use this tool in two ways: enter a purchase amount and the amount tendered to calculate the change due, or enter a change amount directly. The calculator supports 9 currencies: USD, EUR, GBP, CAD, AUD, MXN, PHP, NZD, and BRL. You can also disable specific denominations to match what bills and coins you actually have available.

For other financial tools, use our Tip Calculator Based on Hours Worked to distribute tips fairly, our Checkbook Balance Calculator to reconcile your accounts, or our Salary to Hourly Calculator to understand your true wage.

All calculations happen entirely in your browser — no data is sent to any server. Your financial information remains completely private.

Frequently Asked Questions (FAQ)

How does the change calculator work?
The calculator uses a "greedy algorithm" to find the minimum number of banknotes and coins for any change amount. Starting from the largest available denomination, it uses as many as possible without exceeding the remaining balance, then moves to the next smaller denomination. This guarantees the fewest total bills and coins for standard currency systems.
What currencies are supported?
Currencies supported include USD (US Dollar), EUR (Euro), GBP (British Pound), CAD (Canadian Dollar), AUD (Australian Dollar), MXN (Mexican Peso), PHP (Philippine Peso), NZD (New Zealand Dollar), and BRL (Brazilian Real). You can also disable specific denominations to match what you have available in your cash register or wallet.
What happens if I disable certain denominations?
If you disable denominations and the calculator cannot make exact change, it rounds the amount to the nearest multiple of the smallest remaining denomination and shows an adjustment note. This simulates real-world scenarios where certain coins or bills are unavailable.
How do I use the purchase mode?
Select "Calculate Change" mode, enter the purchase amount and the amount tendered by the customer. The calculator subtracts the purchase from the tendered amount to determine change due, then computes the optimal bill and coin breakdown. For quick calculations without a purchase, use "Enter Change" mode to input a change amount directly.
Is this useful for retail or restaurant staff?
Yes. This calculator works as a cash register change maker for retail stores, restaurants, bars, and any business handling cash. Our Tip Calculator Based on Hours Worked can also help with tip distribution. For broader financial tracking, use our Checkbook Balance Calculator.
Is my data secure?
All calculations happen entirely in your browser. No financial data is sent to any server. Your currency preferences, purchase amounts, and change calculations remain private on your device.

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