Gold Weight Addition & Subtraction Calculator: Vori, Ana, Roti & Point BD
Traditional Bangladeshi gold weights cannot be calculated on regular decimal calculators because each unit follows a different numerical base: 10 points make 1 roti, 6 roti make 1 ana, and 16 ana make 1 vori (totaling 960 points or 11.664 grams). This specialized calculator automates multi-tiered carry and borrow arithmetic, allowing you to add multiple jewelry items or deduct stone, wax, and lac inclusions to reveal true net gold weight and live market valuation under official BAJUS benchmarks.
Direct Answer (Gold Weight Arithmetic Rules):
Traditional Bangladeshi gold weights cannot be calculated on regular decimal calculators because each unit follows a different numerical base: 10 points make 1 roti, 6 roti make 1 ana, and 16 ana make 1 vori (totaling 960 points or 11.664 grams). This specialized calculator automates multi-tiered carry and borrow arithmetic, allowing you to add multiple jewelry items or deduct stone, wax, and lac inclusions to reveal true net gold weight and live market valuation under official BAJUS benchmarks.
Live BAJUS Valuation:
Estimated market value based on live rates:
Gold Weight Units Conversion Matrix
| Unit | Ana | Roti | 960 Pts Mode | 1000 Pts Mode | Grams (g) |
|---|---|---|---|---|---|
| ১ ভরি (Vori) | ১৬ আনা | ৯৬ রতি | ৯৬০ পয়েন্ট | ১০০০ পয়েন্ট | ১১.৬৬৩৮ গ্রাম |
| ১ আনা (Ana) | ১ আনা | ৬ রতি | ৬০ পয়েন্ট | ৬২.৫ পয়েন্ট | ০.৭২৮৯ গ্রাম |
| ১ রতি (Roti) | ০.১৬৬ আনা | ১ রতি | ১০ পয়েন্ট | ১০.৪১৭ পয়েন্ট | ০.১২১৫ গ্রাম |
| ১ পয়েন্ট (Point) | ০.০১৬ আনা | ০.১ রতি | ১ পয়েন্ট | ১ পয়েন্ট | ০.০১২১ গ্রাম |
Why Standard Calculators Fail at Gold Weight Arithmetic
Everyday electronic pocket calculators and smartphone apps operate strictly on base-10 decimals, where every column carries over at 10. However, traditional goldsmiths and authorized jewelry showrooms across Bangladesh utilize a historical mixed-radix numerical system where each measurement tier has a completely different mathematical base:
When someone enters 1.5 Vori into a phone calculator, it displays 1.50, but in traditional gold trade, 1.5 Vori means 1 Vori and 8 Ana (half of 16), not 1 Vori and 5 Ana! Mistaking decimals for traditional sub-units causes massive accounting mistakes when aggregating bridal sets or calculating customer settlements.
The Official Carry and Borrow Rules for Gold Arithmetic
| Measurement Tier | Mathematical Base | Addition Carry Rule (যোগের নিয়ম) | Subtraction Borrow Rule (বিয়োগের ধার নিয়ম) |
|---|---|---|---|
| Points (পয়েন্ট) | Base 10 | Every sum of 10 points carries over as 1 Roti to the Roti column | Borrowing 1 Roti from the left adds exactly 10 Points |
| Roti (রতি) | Base 6 | Every sum of 6 roti carries over as 1 Ana to the Ana column | Borrowing 1 Ana from the left adds exactly 6 Roti |
| Ana (আনা) | Base 16 | Every sum of 16 ana carries over as 1 Vori to the Vori column | Borrowing 1 Vori from the left adds exactly 16 Ana |
| Vori (ভরি) | Unbounded | Standard decimal integer summation applies | Standard decimal subtraction applies |
Net Gold Weight vs Gross Scale Weight: Stone & Wax Deductions
A critical consumer protection issue in retail jewelry purchases is distinguishing between gross scale weight and net precious metal weight:
Ornaments frequently incorporate gemstones, cubic zirconia (CZ), glass beads, threaded dori, colored enamel (meenakari), or lac/wax filler (gala) inside hollow bangles. These non-metallic components contribute heavy physical weight to the scale but have zero scrap gold value.
Under BAJUS consumer trade regulations, jewelers must physically weigh and deduct all stone and wax inclusions from the gross scale weight before calculating the gold metal price. Customers must never pay gold rates for stones or wax.
Worked Real-World Calculation Examples
Points sum to 20 = 2 Roti carried, 0 Points remain. Roti sum to 11 = 1 Ana carried, 5 Roti remain. Ana sum to 28 = 1 Vori carried, 12 Ana remain. Total Vori = 1 + 1 = 2.
Points: 2 - 8 requires borrowing 1 Roti (+10) -> 12 - 8 = 4 Points. Roti: 0 - 4 requires borrowing 1 Ana (+6) -> 6 - 4 = 2 Roti. Ana: 3 - 6 requires borrowing 1 Vori (+16) -> 19 - 6 = 13 Ana. Vori: 2 - 0 = 2 Vori.
BAJUS Resale and Exchange Policy on Net Gold Weight
Once net gold weight is isolated by deducting stones and wax, retail liquidation follows standard BAJUS guidelines:
When liquidating old hallmarked gold for cash, jewelers apply an 18% statutory deduction on the net metal value at prevailing rates. Making charges and original VAT paid are non-refundable.
When trading in old ornaments towards newly crafted hallmarked jewelry, the deduction is reduced to 12%, preserving 6% more capital value towards your new purchase.
Explore Related Bullion Calculators & Converters
Cross-reference your weight arithmetic with our suite of specialized precious metal calculators:
Traditional weight arithmetic equations, mixed-base carryover rules, and stone deduction methodologies follow standards established by the Bangladesh Jewellers Association (BAJUS) and trade conventions in Tanti Bazar, Old Dhaka. Curated and reviewed by Senior Bullion Analyst Mehedi Hasan.
Mehedi Hasan
• Bullion Research Analyst & EditorMehedi Hasan is a senior bullion market researcher and financial editor with over 8 years of experience covering precious metals, BAJUS regulatory policies, and international COMEX/LBMA dynamics.
Frequently Asked Questions
Related Gold Calculators & Tools
View all toolsConvert traditional bullion units into points and grams.
Instant karat purity ratio and alloy percentage converter.
Complete finished showroom bill calculation.
Calculate pure bullion net yield by eliminating copper/alloy.