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Shelf Life Calculator

Date & Time

Expiry date · days remaining · expiring/expired check

Quick Answer

Shelf Life Calculator: Expiry date · days remaining · expiring/expired check. Shelf Life Calculator uses standard date & time formulas to compute accurate results instantly.

Use by
Jul 15, 2026 (Wed)
Total shelf life 181 days
Total shelf life181 days
Elapsed—
Remaining—
Shelf life used—

Calculation steps

  1. 1Production date: 2026-01-15
  2. 2Expiry = production + 6 months (calendar month; month-end rolls back)
  3. 3Total shelf life = 2026-07-15 − 2026-01-15 = 181 days
ItemTypical shelf lifeAfter openingStorage tip
巴氏鲜奶7 天开封后 24 小时内全程 2-6℃ 冷藏
常温纯牛奶6 个月开封后 24 小时内常温避光保存
鲜鸡蛋30 天—大头朝上冷藏
真空大米12 个月开封后 3 个月内吃完阴凉干燥防虫
口红 / 唇膏未开封 3 年开封后 12 个月（12M）避免高温暴晒
罐头食品24 个月开封后冷藏 2-3 天胀罐、漏罐即弃
Shelf life is the manufacturer's guaranteed period under stated storage — not an absolute spoilage line. Cosmetics show a PAO (period-after-opening) jar icon like 6M/12M/24M once opened. "Expiring soon" thresholds vary: this tool flags remaining ≤ max(7 days, 10% of total). Calendar months roll back on month-end overflow (Jan 31 + 1 month = last day of Feb).

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How to Use

  1. Pick dates or a mode: select start/end dates or switch modes in the Shelf Life Calculator.
  2. Instant calculation: results appear immediately with day/week/month equivalents.
  3. Solve both ways: change any field and everything updates — forward or reverse.
  4. Check the context: read the solar-term/holiday/rule notes on this page.

Key Points

  • Shelf Life Calculator is a free online date & time tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Expiry date · days remaining · expiring/expired check.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Shelf Life Calculator formula

Shelf Life Calculator uses standard date & time formulas to compute accurate results instantly.

FAQ

How do I use the Shelf Life Calculator?
Open the page and fill in the input fields — results update automatically. Expiry date · days remaining · expiring/expired check.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on standard calendar arithmetic. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Shelf Life Calculator[EB/OL]. https://www.yijiansuan.com/en/c/date/shelf-life

Results provided by this tool are for reference only and do not constitute professional advice.