은행가의 반올림

은행원 반올림(반짝수)은 동점 편향이 중요한 반복 계산을 위해 설계되었습니다.

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반올림 계산기
숫자를 입력하고 반올림 환경설정을 선택하세요.
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📋 작동 방식

작동 방식

1

단계 1

Round normally when the deciding digit is not an exact tie.

2

단계 2

On exact ties at 5, check the kept digit parity.

3

단계 3

Choose the even outcome to finish rounding.

📊 예

실제 사례

Examples focus on tie-value parity decisions.

입력 대상 방법 결과
2.5 가장 가까운 정수 반 짝수(뱅커) 2
3.5 가장 가까운 정수 반 짝수(뱅커) 4
6.25 가장 가까운 10분의 1(1dp) 반 짝수(뱅커) 6.2
팁

일반적인 실수

출력을 검증할 때 자주 발생하는 반올림 오류를 피하세요.

  • Assuming every tie rounds upward.
  • Ignoring odd/even parity of the kept digit.
  • Applying Half Even logic to non-tie digits unnecessarily.
  • Using Half Up in workflows that require bias reduction.
❓ FAQ

자주 묻는 질문

Why is this called banker's rounding?
It is widely used in finance and statistics to reduce cumulative rounding bias.
Does Half Even always round ties down?
No. Ties round to the nearest even outcome, which can be up or down.
When should Half Even be preferred?
Prefer it when repeated rounding should not drift systematically upward or downward.
Can Half Even be used for large numbers?
Yes. It works for all supported place values.