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Round money amounts to the nearest cent (2 decimal places)
• Look at the third decimal place
• If 5 or more, round up
• If less than 5, round down
• Result always shows 2 decimal places (cents)
• $19.995 → $20.00
• $5.344 → $5.34
• $12.125 → $12.13
• $99.999 → $100.00
Enter an amount to see the result
| Original | Rounded |
|---|---|
| $19.995 | $20.00 |
| $5.344 | $5.34 |
| $12.125 | $12.13 |
| $99.999 | $100.00 |
| $3.142 | $3.14 |
| $49.995 | $50.00 |
Tax Calculation
$25.00 × 8.75% tax = $2.1875 → $2.19
Tip Calculation
$47.50 × 18% tip = $8.55 → $8.55
Gas Purchase
12.456 gallons × $3.299 = $41.076 → $41.08
Bill Split
$89.75 ÷ 4 people = $22.4375 → $22.44
In U.S. currency, cents are the hundredths place. One cent = $0.01. When rounding to the nearest cent, we keep exactly 2 decimal places.
Example: $19.995 has three decimal places. We need to round to two.
Look at the third decimal place (thousandths):
• If it's 5, 6, 7, 8, or 9: Round up (add 1 cent)
• If it's 0, 1, 2, 3, or 4: Round down (keep current cents)
Example: $19.995 - the third digit is 5, so round up to $20.00
Cash registers and payment systems can only handle whole cents. Calculations involving percentages (tax, tips, interest) often produce fractions of cents that must be rounded.
Proper rounding ensures accurate financial transactions and accounting.
Look at the third decimal place. If it's 5 or higher, round up by adding one cent. If it's 4 or lower, round down by keeping the current cents. For example, $5.344 becomes $5.34 (round down), and $5.345 becomes $5.35 (round up).
$19.995 rounds to $20.00. The third decimal place is 5, so we round up. The cents (99) plus 1 equals 100, which becomes a full dollar, carrying over to make $20.00.
Physical currency only exists in whole cent denominations. Calculations involving percentages (sales tax, tips, interest rates) often produce fractional cents that can't be paid. Rounding ensures all money amounts are practical for real transactions.
Most banks use standard rounding (round half up) for interest calculations. Daily interest often produces fractional cents that are rounded to the nearest cent when credited to your account monthly or quarterly.
Most retailers follow standard mathematical rounding rules: round up if the third decimal is 5 or more, down if less than 5. However, some countries have specific regulations for cash transactions.
Gas prices like $3.299 per gallon round normally when calculating your total. If you buy 10.5 gallons at $3.299/gal = $34.6395, which rounds to $34.64 (the amount you pay).