What This Tool Can Do
This tool helps you:
- Calculate single discounts (e.g., 30% OFF)
- Calculate double discounts (e.g., 30% OFF + 10% tax-free)
- See the final price and total savings instantly
Discount Calculator
This discount calculator helps you instantly calculate sale prices, tax-free savings, and combined discounts. Perfect for shopping in Japan where multiple discounts (store sales + tax-free) are common. Free to use, no signup required.
Free & No Signup Required
About Discount Calculations
Discount calculation determines the final price after applying percentage reductions. In Japan, you'll often encounter multiple discounts:
- Store sales: 30% OFF, 50% OFF promotions
- Tax-free shopping: ~10% savings for tourists
- Member discounts: Additional reductions with loyalty cards
Final Price = Original × (1 - Rate1/100) × (1 - Rate2/100)
🛍️ Calculate Discount
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Final Price
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Total Savings
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Total Discount Rate
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Results will auto-calculate as you type.
How the Calculation Works
This tool uses sequential discount calculation:
- First discount is applied to the original price
- Second discount is applied to the already-discounted price
- This method reflects real-world shopping scenarios
💡 Example Calculation
Q. A ¥10,000 item is 30% OFF, plus 10% tax-free. What's the final price?
A. Enter "10000" for original price, "30" for first discount, and "10" for second discount. Result: ¥6,300 (you save ¥3,700, total 37% off!).
📝 使い方
- Enter the original price
- Enter the first discount rate (%)
- If there's a second discount, enter it too
- Results are calculated automatically
Frequently Asked Questions
Q. Is this tool free to use? +
Yes, all features are completely free. No registration or app installation required.
Q. Is my data saved? +
No, your input and calculation results are not saved to any server. All processing happens in your browser, so your data stays completely private.
Q. Can I use this for commercial purposes? +
Yes, you can use this tool freely for both commercial and personal purposes.
🔗 関連する計算ツール
❓ About This Tool
Q. How do I calculate double discounts?
A. Apply the first discount, then apply the second discount to the reduced price. For example, 30% off then 20% off a $100 item: $100 × 0.7 × 0.8 = $56.
Q. What is the difference between 50% off and buy one get one free?
A. Both are equivalent if you buy 2 items. However, if you only buy 1 item, 50% off saves you more.
Q. How much do I save with a 20% discount?
A. Multiply the original price by 0.2. For example, 20% off a ¥10,000 item saves you ¥2,000.
このツールについて
本ツールは一般的な計算式に基づいて自動計算を行うものです。正確性には配慮していますが、端数処理や特殊なケースでは結果が異なる場合があります。重要な判断をされる際は、必ずご自身で再確認いただくか、専門家にご相談ください。
最終更新日：2026年3月