Precision Numismatic Measurement Suite

World Coin Weight & Roll Calculators

Verify coin roll weights in grams, calculate bulk coin jar totals, test bullion authenticity via specific gravity, and match exact capsule sizes.

Quick Navigation: All Calculators How It Works Browse Coin Catalog Country Directory Geography Games

6 Modules

Launch 6 Coin Calculators

140

Browse Verified Coin Weights

246

Explore Supported Countries

0,01 g

Test Alloy & Specific Gravity

Interactive Collector Utilities

Select a Numismatic Calculator

Tap or click any module to start calculating

Primary Tool

Coin Roll & Weight Calculator Wizard

Choose a country, currency, and denomination to calculate the exact weight of coin rolls and loose stacks, or verify total face value from your scale reading in grams.

Exact Gram Tolerances Step-by-Step Wizard Roll & Stack Totals

Open Weight Calculator

Forensic & Bullion Tool

Coin Authenticity & Bullion Density Calculator

Detect counterfeit silver, gold, and world coins using mint weight tolerances, Archimedes' specific gravity principle, and our interactive bullion melt scenario slider.

Specific Gravity (g/cm³) Interactive Spot Slider Troy Ounce ASW / AGW

Verify Authenticity & Melt

Roll Hunting & Ledger

Multi-Denomination Batch & Roll Alloy Splitter

Tally entire sorted coin jars across all denominations on one screen, or algebraically split sealed rolls to detect copper and silver coins by weight.

Multi-Coin Batch Ledger Sealed Roll Alloy Splitter Wrapper Shopping List

Open Batch & Alloy Tool

Global Identifier

World Coin Date & Calendar Converter

Translate Islamic Hijri (AH), Ottoman regnal years, Japanese Nengo Kanji, Thai Buddhist, and Roman coin inscriptions into Gregorian years.

Arabic & Kanji Keypads Hijri & Regnal Years Japanese & Asian Eras

Convert Coin Dates

Storage & Supplies

Coin Capsule, 2x2 Flip & Tube Fit Calculator

Calculate exact direct-fit acrylic capsule sizes, Air-Tite and Quadrum foam ring models, 2x2 Mylar flip windows, and tube capacities by diameter and thickness.

Direct & Ring-Fit (mm/in) Thickness Depth Check 2x2 Flip & Tube Count

Find Capsule & Holder Size

Grading & Valuation

Sheldon Coin Grade (1–70) & Slabbing ROI Calculator

Estimate your coin's Sheldon grade (PO-1 to MS-70) and European equivalent, then calculate whether PCGS or NGC certification fees yield a positive net ROI.

Sheldon 1–70 & EU Scale Slabbing Break-Even ROI Wear Loss Allowance

Estimate Grade & Slab ROI

Standardized Workflow

How Our Numismatic Calculators Work

Every calculator is directly linked to our verified numismatic database to ensure accurate weight and denomination results.

Browse Full Coin Catalog

Step 1

Select Country & Currency

Choose the issuing nation and monetary system to load the exact historical or circulating coin series from our database.

Browse Country Directory

Step 2

Input Weight or Roll Count

Enter the measured weight in grams from your digital scale, or specify the number of coins and rolls you wish to evaluate.

Launch Weight Wizard

Step 3

Verify Mint Specifications

Receive instant breakdowns of total face value, piece count, and official Krause (KM#) weight tolerances to spot missing or foreign coins.

Verify Authenticity & KM#

Looking for a Specific Coin Specification?

Need the exact diameter, thickness, or Krause KM# number of a single coin before weighing a roll? Search our complete world coin catalog.

Explore Coin Catalog Advanced Search