Gold Weight Calculator
Calculate gold weight from volume and purity
Select the karat purity of your gold
How to Use This Calculator
Enter Volume
Input the volume of your gold piece. You can use cubic centimeters (cm³), cubic millimeters (mm³), or cubic inches (in³). Select the appropriate unit from the dropdown menu.
Select Purity
Choose the karat purity of your gold. Common purities include 24k (pure), 22k, 18k, 14k, 12k, and 10k. The karat value determines the percentage of pure gold in the alloy.
View Results
Click "Calculate" to see the weight in grams, troy ounces, regular ounces, and pounds. The calculator also shows the pure gold content based on the purity you selected.
Formula
Weight = Volume × Density × (Purity ÷ 24)
W = V × ρ × (K/24)
Where:
- W = Weight (grams)
- V = Volume (cm³)
- ρ = Density of pure gold = 19.32 g/cm³
- K = Karat purity (0-24)
Example:
For a gold piece with volume 5 cm³ and 18k purity:
Weight = 5 × 19.32 × (18/24) = 5 × 19.32 × 0.75 = 72.45 grams
Pure gold content = 72.45 × 0.75 = 54.34 grams
About Gold Weight Calculator
The Gold Weight Calculator is a specialized tool for calculating the weight of gold objects based on their volume and purity. This calculator is essential for jewelers, gold traders, collectors, and anyone working with precious metals who needs to determine weight from volume measurements.
When to Use This Calculator
- Jewelry Design: Calculate the weight of gold needed for a specific design based on volume
- Gold Trading: Determine the value of gold objects when you only know the volume
- Investment Analysis: Calculate gold weight for investment purposes
- Manufacturing: Estimate material requirements for gold production
- Appraisal: Estimate weight when direct weighing is not possible
Why Use Our Calculator?
- ✅ Multiple Units: Supports cm³, mm³, and in³ volume units
- ✅ Various Purities: Calculate for any karat from 10k to 24k
- ✅ Comprehensive Results: Shows weight in grams, troy ounces, ounces, and pounds
- ✅ Pure Gold Content: Displays actual pure gold weight separate from alloy weight
- ✅ Accurate Density: Uses standard gold density of 19.32 g/cm³
Gold Purity Standards
- 24k (100%): Pure gold, soft and rarely used in jewelry
- 22k (91.7%): Very high purity, common in high-end jewelry
- 18k (75.0%): Premium jewelry standard, good balance of purity and durability
- 14k (58.3%): Most common in US jewelry, durable and affordable
- 10k (41.7%): Minimum karat to be considered gold in US, very durable
Important Notes
- This calculator assumes uniform density throughout the gold piece
- For hollow objects, use the volume of solid gold only (not including empty space)
- Results are estimates - actual weight may vary slightly due to alloy composition variations
- Troy ounces are standard for precious metals (1 troy oz = 31.1035 grams)
- Always verify purity through professional testing if accuracy is critical
Frequently Asked Questions
Why is gold density 19.32 g/cm³?
This is the standard density of pure gold at room temperature. Gold is one of the densest common metals, which is why even small volumes of gold can be quite heavy. The density is based on the atomic structure and spacing of gold atoms.
How do I measure the volume of an irregular gold piece?
For irregular shapes, use water displacement (Archimedes' principle). Fill a graduated cylinder with water, record the volume, submerge the gold, and measure the new volume. The difference is the gold's volume.
Does alloy composition affect the calculation?
Yes, slightly. Different alloying metals (copper, silver, etc.) have different densities. This calculator uses an average density based on the gold percentage. For precise calculations with known alloys, you'd need to account for each metal's density and percentage.
What's the difference between troy ounces and regular ounces?
Troy ounces (31.1035 g) are used for precious metals, while avoirdupois ounces (28.3495 g) are used for everyday items. One troy ounce is heavier than one regular ounce. Gold is always measured in troy ounces.
Can I use this for other precious metals?
This calculator is specifically designed for gold. Silver (density 10.49 g/cm³) and platinum (density 21.45 g/cm³) have different densities and would require different calculations. Use specialized calculators for those metals.