Gold Portfolio Value Calculator: Spot Price, Purity, and P&L Explained
Calculate your gold portfolio value using the formula: Portfolio Value = (Total Ounces × Purity Factor) × Current Spot Price. Track profit & loss by comparing current market value to purchase price. Adjust for purity (24K, 22K, 18K) and spot price fluctuations for accurate 2026 valuations.
Last updated: February 6, 2026 • Reading time: 8 minutes
Next Steps: Practical Calculators
1The Portfolio Value Formula Explained
Calculating gold portfolio value requires three inputs: total gold quantity (adjusted for purity), purity factor (based on karat), and current spot price (market price). The LBMA (London Bullion Market Association) sets the global benchmark spot price daily, which serves as the foundation for all valuations.
Core Formula
Portfolio Value = (Total Ounces × Purity Factor) × Current Spot Price
Total Ounces
Sum of all gold holdings in troy ounces. For mixed purity, calculate separately first.
Purity Factor
Multiplier based on karat: 24K (0.999), 22K (0.917), 18K (0.750), 14K (0.583)
Current Spot Price
LBMA London Fix: $2,850 per troy ounce (February 2026). Update in real-time.
Purity Factors: The Complete Conversion Table
| Purity (Karat) | Gold Content | Purity Factor | Valuation Impact | Common Uses |
|---|---|---|---|---|
| 24K | 99.9% | 0.999 | 0.1% discount to pure | Investment bars, Krugerrands, Maples |
| 22K | 91.7% | 0.917 | 8.3% discount to pure | American Gold Eagles, British Sovereigns |
| 18K | 75.0% | 0.750 | 25.0% discount to pure | Jewelry, some Asian coins |
| 14K | 58.3% | 0.583 | 41.7% discount to pure | Most jewelry, lower-end bullion |
| 10K | 41.7% | 0.417 | 58.3% discount to pure | Fashion jewelry (not recommended for investment) |
Key Insight: Always apply purity factors before multiplying by spot price. Tracking 10 oz of 22K gold as 10 oz pure overvalues holdings by 8.3%. The formula automatically adjusts for purity, ensuring accurate valuations.
2Calculating Profit & Loss: Real Examples
Example 1: Single Holding P&L
Purchase: 10 oz American Gold Eagles (22K)
Cost per oz: $1,900
Purity: 22K (0.917)
Purchase Cost: $19,000 (10 × $1,900)
Pure Gold: 9.17 oz (10 × 0.917)
Current Spot: $2,850/oz
Current Value = 9.17 oz × $2,850 = $26,134.50
Profit: $26,134.50 - $19,000 = +$7,134.50
Percentage: $7,134.50 ÷ $19,000 = +37.6%
Example 2: Mixed Purity Portfolio P&L
Holding 1
5 oz 22K bars
Pure: 4.585 oz
Cost: $9,000
Holding 2
3 oz 18K coins
Pure: 2.25 oz
Cost: $5,400
Holding 3
2 oz 24K bars
Pure: 2.0 oz
Cost: $5,700
Total Pure Gold: 4.585 + 2.25 + 2.0 = 8.835 oz
Total Cost: $9,000 + $5,400 + $5,700 = $20,100
Current Value: 8.835 oz × $2,850 = $25,179.75
Total Profit: $25,179.75 - $20,100 = +$5,079.75 (+25.3%)
Calculate Your Portfolio Value Now
Our Gold Portfolio Tracker automates all calculations: purity adjustments, spot price updates, P&L tracking, and historical performance charts. Start tracking in seconds with privacy-first local storage.
⚠️ Disclaimer & Methodology
This content is for informational purposes only and does not constitute financial advice. Always consult with qualified financial professionals before making investment decisions. Calculations assume standard troy ounces and purity factors based on LBMA specifications.
Assumptions: Spot price: $2,850/oz (LBMA London Fix, February 2026). Purity factors: 24K (0.999), 22K (0.917), 18K (0.750), 14K (0.583). Dealer premiums excluded from portfolio value calculations (track separately).
Frequently Asked Questions
How do I calculate gold portfolio value?▼
The formula is: Portfolio Value = (Total Ounces × Purity Factor) × Current Spot Price. For example, 10 oz of 22K gold (purity factor 0.917) at $2,850/oz spot price = 10 × 0.917 × $2,850 = $26,134.50.
What is gold spot price vs. dealer price?▼
Spot price is the raw gold market price ($2,850/oz in Feb 2026). Dealer price includes premiums (2-8% for coins). Track portfolio value at spot price for accurate market valuation.
How does purity affect portfolio value?▼
Purity determines pure gold content. 10 oz of 22K gold = 9.17 pure ounces (10 × 0.917). Calculate portfolio value using pure ounces for accuracy.
What purity factor should I use?▼
Use standard factors: 24K = 0.999, 22K = 0.917, 18K = 0.750, 14K = 0.583. Multiply total ounces by purity factor to get pure gold ounces.
How do I calculate profit & loss on gold holdings?▼
P&L = Current Market Value - Purchase Price. Calculate in both dollars and percentage. Example: Current value $26,134.50, purchase $20,000, profit = $6,134.50 (+30.7%).
Should I track gold at purchase price or current value?▼
Track both. Purchase price (cost basis) for P&L calculation. Current value (spot price × purity × ounces) for portfolio valuation and performance monitoring.
How do I calculate value for mixed purity holdings?▼
Calculate pure gold for each holding separately, then sum. Example: 5 oz 22K + 3 oz 18K = (5×0.917) + (3×0.750) = 4.585 + 2.25 = 6.835 pure ounces total.
Do dealer premiums affect portfolio value?▼
Dealer premiums are fabrication costs, not gold value. Track separately: Gold Value (at spot) + Premium Paid = Total Cost. Portfolio value tracking uses spot price only.
How often should I recalculate portfolio value?▼
Automated trackers update in real-time with spot price changes. Manual trackers need weekly updates for accuracy. Significant price moves warrant immediate recalculation.
How do I handle fractional gold coins?▼
Treat fractional coins as decimal fractions of ounces. 5 coins of 1/10 oz each = 0.5 total ounces. Apply purity factor and spot price normally.
Should I include gold ETFs in portfolio value?▼
Yes. ETFs add separate calculation: Shares × Share Price. Sum ETF values with physical gold values for total portfolio valuation.
What unit should I use for gold calculation?▼
Use troy ounces (31.1035g) for consistency with global markets. Convert grams to troy oz: 1 gram = 0.03215 troy oz.
How do I account for inflation in portfolio value?▼
Calculate nominal return: (Current Value - Purchase Price) / Purchase Price. Subtract inflation rate (typically 3% annually) for real return measurement.
Do I need special calculators for gold portfolio value?▼
No. Spreadsheets work, but automated trackers like ours eliminate manual errors, provide real-time pricing, and generate performance charts automatically.
How accurate are portfolio value calculations?▼
Calculations are mathematically exact assuming accurate input data. Real-world accuracy depends on: correct purity factors, current spot prices, and precise quantity measurements.
Should I track gold in grams or ounces?▼
Record in purchase unit (grams, tael, tola), but convert to troy ounces for valuation. Trackers auto-convert between units for convenience.
How do I verify portfolio value accuracy?▼
Cross-check with dealer quotes, compare multiple tracker outputs, review calculation formulas, and ensure spot prices are current. Reconcile discrepancies immediately.
What if my portfolio value seems incorrect?▼
Check: purity factors applied correctly, quantity units (troy oz), spot price updates, and mixed holdings calculated separately. Most errors stem from unit conversion.