Gold Purity Calculator – Calculate Karat, Pure Weight & Value Free

Spluxly’s free online Gold Purity Calculator is a precise and practical tool designed for jewellers, gold buyers, investors, and anyone who needs to assess the quality and value of a gold item. Enter the total weight of your gold piece in grams, troy ounces, or kilograms, specify the gold purity either in karats (such as 24K, 22K, 18K, 14K, or 10K) or as a direct percentage, and optionally enter the current market price per gram to instantly calculate the monetary value. The calculator returns the purity expressed in both karat and percentage form, the exact weight of pure gold contained in the item, and the estimated market value when a price is provided. All results are displayed in a comprehensive breakdown table alongside a visual purity progress bar that shows the gold content percentage at a glance. Automatic unit conversion handles ounces and kilograms seamlessly. Completely free, no registration required.

How to Use the Gold Purity Calculator Online

Calculating your gold’s purity and value takes just a few seconds. Follow these simple steps:

• Enter Total Weight – Type the total weight of your gold item into the weight field and select your preferred unit from the dropdown: Grams, Troy Ounces, or Kilograms
• Select Purity Input Type – Choose whether to enter gold purity as a Karat value (e.g., 22) or as a direct Percentage (e.g., 91.67%) using the purity toggle
• Enter Gold Purity – Input the karat number or percentage figure that corresponds to your gold item’s purity level
• Enter Market Price (optional) – Type the current gold market price per gram in your currency to calculate the estimated monetary value of your gold
• Click Calculate – Instantly receive purity in both percentage and karat, pure gold weight, market value (if a price was entered), a full breakdown table, and a purity progress bar
• Review the Breakdown Table – View all metrics in detail including total weight, weight converted to grams, purity percentage, purity in karats, pure gold weight, market price, and total gold value

Formula Used

Gold purity and pure gold weight are calculated using the following standard formulas:

Purity Percentage from Karat: Purity (%) = (Karat ÷ 24) × 100

Pure Gold Weight: Pure Gold Weight = Total Weight (g) × (Purity % ÷ 100)

Gold Value (if market price is entered): Gold Value = Pure Gold Weight (g) × Market Price per Gram

Example for a 22K gold item weighing 10 grams at $90 per gram:

• Purity: (22 ÷ 24) × 100 = 91.67%
• Pure Gold Weight: 10 × 0.9167 = 9.167 g
• Gold Value: 9.167 × $90 = $825.03

Common Karat to Purity Reference:

• 24K = 99.99% pure gold
• 22K = 91.67% pure gold
• 18K = 75.00% pure gold
• 14K = 58.33% pure gold
• 10K = 41.67% pure gold

Why Use Spluxly’s Gold Purity Calculator?

• Karat and Percentage Input – Enter gold purity either as a karat value or a direct percentage using a simple toggle, giving full flexibility for any gold item or documentation format
• Multi-Unit Weight Support – Accepts total weight in grams, troy ounces, or kilograms with automatic conversion to grams for consistent and accurate calculations every time
• Pure Gold Weight – Calculates the exact weight of pure gold contained within your item based on the total weight and purity level for precise quality assessment
• Market Value Estimation – Optionally enter the current gold price per gram to instantly calculate the estimated monetary value of your gold piece alongside the purity results
• Purity Progress Bar – A visual percentage bar clearly displays the gold content level from 0% to 100% so you can assess purity quality at a glance without reading numbers
• Comprehensive Breakdown Table – Every result includes a full table covering total weight, gram-converted weight, purity percentage, karat equivalent, pure gold weight, market price, and total value
• 100% Free & Instant – No registration, no fees — accurate gold purity, weight, and value results with a full breakdown delivered in seconds