Shopper calculator
Discount Calculator
Calculate final price, savings, tax, and unit price for percent, fixed, BOGO, and stacked discounts.
Calculator setup
Enter values on the left; results update instantly.
Calculation result
Fill in the inputs to see results here.
Scrape hundreds of webpages in one click with the Thunderbit Chrome Extension. Prefer to hand this job to AI? Use the Thunderbit API or Thunderbit MCP. Want us to run it for you? Use our Web Scraping Service.
Scrape Pricing Data with AIUse Thunderbit to automate website scraping and extract structured pricing data fast. Pull details from pages, subpages, PDFs, and images, then export to Sheets, Airtable, or Notion.
Install fromChrome Web Store
Scrape Pricing Data with AI
Monitor discounts, list prices, and product details across websites with Thunderbit’s AI Web Scraper Chrome extension. Use AI Suggest Fields to capture structured data, scrape pagination, and enrich results by visiting subpages for deeper attributes.
Extract data from webpages, PDFs, docs, and images, then summarize, categorize, and format it into clean tables. Export to Google Sheets, Airtable, or Notion to keep your pricing workflows organized and up to date.
How to Calculate a Discount Using Thunderbit
STEP 1Download and InstallDownload and install the Thunderbit Chrome Extension from the Thunderbit Chrome Extension Download Page. Once installed, log in or create a free account to get started.
STEP 2Open ExtensionOpen the Thunderbit Chrome Extension, then select the Discount Calculator tool. Choose the tab that matches your inputs: use "Original Price + Discount %" if you know the original price and discount percentage, or use "Original Price + Final Price" if you know the original price and the final price. Enter your values using decimals when needed (for example, 100.00 and 12.5).
STEP 3Click the Calculate Discount ButtonClick the "Calculate Discount" button. Thunderbit will validate your inputs and return a text result that includes Amount Saved, Final Price, and Discount Percentage, each formatted to two decimal places, plus a short summary line showing the formula used. Copy the result for sharing, or paste it into your notes, email, or spreadsheet.
Learn how to calculate discounts and final prices from any two price inputs
Calculate a final price from an original price and discount percentage
Enter an original price and a discount percentage to compute the discounted final price and the amount saved. The calculator supports decimal inputs for precise pricing, and returns results formatted to two decimal places for clarity. This is useful for shoppers comparing deals, retail teams validating promotions, and anyone who needs a quick, reliable way to confirm what a percentage discount means in dollars.
Derive a discount percentage from an original price and final price
If you know the original price and the final price, the tool calculates the implied discount percentage and the amount saved. This helps when a store shows only the sale price, when you are auditing receipts, or when you are matching competitor pricing. If the final price is higher than the original price, the tool still computes the result and indicates it reflects a price increase rather than a discount.
Compare promotions and plan purchases with consistent, readable outputs
Use the Amount Saved, Final Price, and Discount Percentage outputs to compare multiple offers side by side, even when one deal is shown as a percent and another is shown as a sale price. Every value is displayed with two decimal places, making it easier to copy into notes, budgets, or product pricing sheets. The included summary line shows the formula used, supporting quick checks and fewer mistakes.
Validate pricing for retail, ecommerce, and internal approvals
Retailers and ecommerce operators can use the calculator to verify markdowns, confirm advertised savings, and sanity-check promotional setups before publishing. Teams can also use it during approvals to confirm that a proposed discount hits the intended final price. Because the tool accepts decimal inputs and returns a clear calculation summary, it supports accurate pricing decisions for both single items and repeated checks.
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What users say about Thunderbit
Taryn W.Growth Strategist@Thunderbit changed how I run competitor research. I click 'AI Suggest Fields,' and it builds a clean table across paginated results—no coding, no CSS. Huge time-saver when analyzing product data from long-tail marketplaces.
Miles T.Sales Development ConsultantI use Thunderbit to grab emails and phone numbers from directories. It extracts clean contact info in one click, and exporting to Sheets or Notion takes seconds. No extra setup, no coding—just usable data ready to work with.
Rhea C.E-commerce AnalystThunderbit helps me monitor SKU data across multiple pages. I scrape the listings, then use Subpage Scraping to pull full product specs, pricing, reviews, and stock. The AI organizes everything into columns I define.
Cassian B.Real Estate AdvisorThunderbit's Scheduled Scraper makes real estate tracking easier. I describe the interval in plain English, and it automatically pulls updated listings, prices, and links without touching the setup again. Simple and very practical.
Dorian B.Content & SEO SpecialistI use Thunderbit's Field AI Prompts to clean and tag scraped blog content. It extracts titles, authors, and even suggests categories. Works great across dynamic sites and subpages—perfect for building structured SEO datasets.
Lina K.Marketplace Operations LeadWe track SKUs from niche stores using Thunderbit. Cloud Scraping handles 50 pages at a time, and for login-required sites, we switch to browser mode. It’s fast, flexible, and doesn’t need ongoing maintenance or manual edits.
Jorge F.Inbound Sales ManagerThunderbit’s AI Autofill is a lifesaver. After scraping contact info, I use it to fill lead forms directly in my browser. I just select the tab, and it fills everything using the scraped row. No manual input needed.
Alina D.Freelance ResearcherI rely on Thunderbit for extracting data from PDFs, image-based sites, and infinite scroll pages. It handles messy formats with AI and delivers ready-to-export tables I can send to Google Sheets or Airtable in seconds.
Taryn W.Growth Strategist@Thunderbit changed how I run competitor research. I click 'AI Suggest Fields,' and it builds a clean table across paginated results—no coding, no CSS. Huge time-saver when analyzing product data from long-tail marketplaces.
Miles T.Sales Development ConsultantI use Thunderbit to grab emails and phone numbers from directories. It extracts clean contact info in one click, and exporting to Sheets or Notion takes seconds. No extra setup, no coding—just usable data ready to work with.
Rhea C.E-commerce AnalystThunderbit helps me monitor SKU data across multiple pages. I scrape the listings, then use Subpage Scraping to pull full product specs, pricing, reviews, and stock. The AI organizes everything into columns I define.
Cassian B.Real Estate AdvisorThunderbit's Scheduled Scraper makes real estate tracking easier. I describe the interval in plain English, and it automatically pulls updated listings, prices, and links without touching the setup again. Simple and very practical.
Dorian B.Content & SEO SpecialistI use Thunderbit's Field AI Prompts to clean and tag scraped blog content. It extracts titles, authors, and even suggests categories. Works great across dynamic sites and subpages—perfect for building structured SEO datasets.
Lina K.Marketplace Operations LeadWe track SKUs from niche stores using Thunderbit. Cloud Scraping handles 50 pages at a time, and for login-required sites, we switch to browser mode. It’s fast, flexible, and doesn’t need ongoing maintenance or manual edits.
Jorge F.Inbound Sales ManagerThunderbit’s AI Autofill is a lifesaver. After scraping contact info, I use it to fill lead forms directly in my browser. I just select the tab, and it fills everything using the scraped row. No manual input needed.
Alina D.Freelance ResearcherI rely on Thunderbit for extracting data from PDFs, image-based sites, and infinite scroll pages. It handles messy formats with AI and delivers ready-to-export tables I can send to Google Sheets or Airtable in seconds.
