The formula for silver melt value is simple: ASW × spot price = melt value. But most online calculators get one or both of those inputs wrong. Some use incorrect ASW numbers. Others use delayed or daily-average spot prices instead of live data. The difference can be $1-2 per coin, which adds up fast on a bag of junk silver.
We checked each calculator against a known reference: a Morgan dollar has an ASW of 0.7734 troy ounces (26.73g gross × 0.900 purity ÷ 31.1035). Any calculator showing a different ASW is fundamentally wrong.
- Strengths
- Live spot — 60 second refresh, not delayed or daily
- Correct ASW for 20+ coin types with one-click presets
- Junk silver by face value (circulated vs uncirculated rates)
- Deal premium analyzer with A+ to D grading
- Calculation history saved locally
- Limitations
- No historical melt value charts
- Web-only (no native app)
- Strengths
- Correct ASW for all major US and Canadian coins
- Simple, fast interface
- Has been around since ~2007 — well-established
- Limitations
- Spot prices appear delayed (not live)
- Heavy advertising
- No deal analyzer or premium tracking
- No gold karat or scrap calculations
- Strengths
- Accurate ASW from a trusted grading authority
- Clean presentation with coin images
- Also shows numismatic values alongside melt
- Limitations
- Limited coin selection — only their curated list
- No custom weight/purity input
- No junk silver face-value calculator
- Spot price update frequency unclear
- Strengths
- Quick and simple for common US coins
- Includes quantity multiplier
- Limitations
- Dated interface
- Limited coin selection
- Spot price freshness unclear
- No world coins or custom input
- Strengths
- No website or app dependency
- Forces you to understand the math
- Limitations
- Need to memorize or look up ASW for every coin type
- Manual spot price lookup adds friction
- Easy to make multiplication errors
- Slow for batch calculations
The Verdict
MetalMetric wins on live price accuracy (60s refresh) and the broadest feature set (premium analyzer, junk silver by face value, gold/platinum support). Coinflation is the best alternative if you just need a quick reference with correct ASW data and don't mind delayed prices. NGC is ideal if you also want numismatic context alongside melt value.
Try MetalMetric's Calculator →FAQ
The most accurate calculators use live COMEX/LBMA spot prices and correct ASW for each coin type. A Morgan dollar has an ASW of 0.7734 troy oz. MetalMetric, Coinflation, and NGC all use correct ASW data. The key difference is price freshness — MetalMetric updates every 60 seconds.
Melt value = weight in troy ounces × purity × spot price. For a Morgan dollar: 0.7734 oz ASW × spot price. At $30/oz silver, that's $23.20. For junk silver by face value: $1.00 face × 0.715 = 0.715 oz pure silver × spot price.
MetalMetric's junk silver calculator at metalmetric.com/melt/junk-silver-calculator lets you enter face value directly using the industry-standard 0.715 oz/$1 rate (circulated) or 0.723 oz (uncirculated). It calculates total silver content, melt value, and value per dollar of face value.