Is this tool free to use?

Yes, all tools on OmniDash are 100% free with no signup, no registration, and no hidden fees. Use them as much as you need.

Is my data safe and private?

Absolutely. All processing happens locally in your browser. No data is ever uploaded to our servers, ensuring complete privacy and security.

Does this tool work on mobile devices?

Yes! OmniDash is fully responsive and works perfectly on smartphones, tablets, and desktop computers across all modern browsers.

Shopping

Discount Calculator

Calculate the final price and your total savings after a discount is applied.

How to Calculate Discounts Quickly

Whether you're shopping sales, calculating trade discounts for business, or figuring out tip-plus-discount scenarios, understanding discount math saves you money and prevents you from being misled by misleading "sale" pricing.

Quick Mental Math for Common Discounts

10% off — Move the decimal one place left. $85 → $8.50 off → $76.50
20% off — Find 10%, double it. $85 → $8.50 × 2 = $17 off → $68
25% off — Divide by 4. $80 → $20 off → $60
50% off — Divide by 2. $85 → $42.50
15% off — Find 10% + half of 10%. $80 → $8 + $4 = $12 off → $68

Frequently Asked Questions

How do I calculate a percentage off a price?

Multiply the original price by (1 - discount rate). For 30% off a $120 item: $120 × (1 - 0.30) = $120 × 0.70 = $84. Or: find 30% of $120 ($36) and subtract it from $120 = $84.

How do stacked discounts work?

Stacked discounts (e.g., 20% off then an extra 10% off) don't add up to 30%. You apply them sequentially: $100 → 20% off = $80 → 10% off $80 = $72. The combined discount is 28%, not 30%. Retailers use this to make discounts sound larger than they are.

Welcome to OmniDash

Discount Calculator

How to Calculate Discounts Quickly

Quick Mental Math for Common Discounts

Frequently Asked Questions