返品期限計算

How to use

1. Select your purchase date from the date picker.
2. Choose a common return window (14, 30, 60, or 90 days) or type a custom number.
3. The return deadline and days remaining appear instantly.

Related tools

• Refund Calculator
• Discount Calculator
• Date Difference Calculator
• Business Days Calculator

よくある質問

Is this tool free?

Yes, completely free with no signup required.

Does my data leave my device?

No. All calculations happen in your browser — nothing is sent to a server.

Does it work on mobile?

Yes. The tool is mobile-first and works on any modern browser.