日期差计算器
Category 效率工具
计算两个日期之间的绝对间隔，以天、周、近似月和近似年表示。
从 2025-01-01 到 2025-01-31，结果为 30 天、4.29 周、0.99 个月和 0.08 年。
日期差计算器
选择两个有效日期后即可查看差值。
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How this tool helps
选择两个有效日历日期。计算器采用无时间的 UTC 日期绝对差，因此交换顺序仍得到相同的非负结果。两个日期边界之间的天数精确；周数用天数除以7，月数除以30.44，年数除以365.25。因此月和年是近似等值，并非日历年月组成差。
如需从出生日期计算完整日历年、月和日，请使用年龄计算器。
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Helpful questions about this tool
日期顺序重要吗？
不重要，使用绝对差。
天数和周数精确吗？
天数精确，周数等于天数除以7。
为什么月数和年数是近似值？
月份和年份长短不同，因此使用30.44天和365.25天的平均值。
包含时间和时区吗？
不包含，工具使用无时间的UTC日期。
How to use 日期差计算器
1
选择第一个日期
输入有效日历日期。
2
选择第二个日期
输入另一个边界日期。
3
查看天数和周数
用于直接间隔及其七天等值。
4
把月数和年数视作估算
它们使用平均长度，而非日历周年。
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