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Currency, Crypto & Gold Calculator

Convert currency at a live exchange rate, check live Bitcoin, Ethereum, Solana & Dogecoin prices, and work out the value of gold or silver from today's spot price — all in one free tool, with instant, plain-English results.

Live via Frankfurter & CoinGecko 10 currencies · 10 major coins Free, no sign-up Updated: Jul 21, 2026
Fetching live exchange rates…
Source pending…
🪙 Manual entry mode. There is no reliable free live gold/silver price feed, so currency and crypto above are live-fetched, but gold and silver need today's spot price entered by you. Check a source you trust (your bank, a bullion dealer, or a market-data site) and type it in below.
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Rates are fetched live from Frankfurter (European Central Bank reference rates), based at 1 US dollar.
CryptocurrencyPrice (USD)24h change7-day trend
Loading live prices…

Prices are in US dollars, fetched live from CoinGecko's public market-data API, covering 10 coins including Bitcoin, Ethereum, XRP, Cardano, BNB, and the USDT/USDC stablecoins. The 24-hour change is the percentage move over the last day, and the 7-day trend column shows a quick sparkline for the most-followed coins. Crypto is highly volatile; values are for informational purposes only.

₿Crypto value calculator
Pick a coin and an amount to find its current US-dollar value at the live price.
🔄Crypto converter
Convert one coin into another coin or into US dollars (e.g. BTC → ETH, ETH → USD). The cross rate is computed through live USD prices.
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Enter today's spot price yourself (check your bank, a bullion dealer, or a market-data site) — 1 troy ounce = 31.1034768 grams. The table and tools below update instantly from these two numbers; nothing here is fetched live.
TypePrice / gramPrice / troy oz

Karat and purity fractions are standard references; the dollar values above are only as accurate as the spot price you entered.

⚖️Value by weight
Choose a karat or purity, enter a weight, and get the total dollar value from the spot price above.
🔁Troy oz ↔ gram converter
Precious metals are priced per troy ounce, not a standard ounce. Convert between the two units (pure unit math, no spot price needed).
🔎Hallmark / purity stamp decoder
Look up a hallmark number stamped on a ring, coin, or piece of flatware (585, 750, 925, etc.) to see what karat or purity it means.
🪙Gold coin melt-value calculator
Pick a named bullion coin to see how much pure gold it contains and what that's worth at the gold spot price above — each coin has its own gross weight and purity.
Quick answer This tool converts currency, crypto, and precious metals to US dollars. Currency and crypto rates are fetched live from Frankfurter and CoinGecko; gold and silver require you to enter today's spot price yourself, since no free live feed for metals exists. For example, enter 100 in the Currency tab to convert USD to EUR at today's rate, or enter a gold spot price to find the value of 10 grams of 14K gold.
—1 USD in EUR (live)
—1 USD in GBP (live)
—Bitcoin price (live, USD)
—24K gold, $/gram (manual)
⚠️ Informational note: Currency rates come live from Frankfurter (ECB reference rates) and crypto prices live from CoinGecko; both can differ slightly from the rate a bank or exchange actually gives you once fees and spreads are applied. Gold and silver values are only as accurate as the spot price you type in — this tool does not fetch or guess a metals price for you. Crypto assets are highly volatile. Results are for informational purposes only and are not financial or investment advice.
💱 Currency, Crypto & Gold Calculator — ToolPico ↗

How do currency, crypto, and gold conversions work?

A complete guide to live exchange rates, live crypto prices, and manual gold/silver spot-price math — with formulas and examples.

Currency, crypto & gold calculation means turning an amount you hold — dollars, another currency, a cryptocurrency, or a weight of precious metal — into a US-dollar value you can compare. This tool does three things: the Currency tab converts USD to nine other major currencies at a live exchange rate; the Crypto tab shows the live USD price of Bitcoin, Ethereum, Solana, and Dogecoin and converts between them; the Gold & Silver tab takes a spot price you enter and computes gram, troy-ounce, and karat values instantly.

How is a live currency exchange rate used to convert an amount?

Quick answerTo convert from one currency to another, the amount is first expressed in US dollars, then converted to the target currency: Result = amount ÷ (USD→source rate) × (USD→target rate). If the source currency is USD, the first division is skipped. All rates come from Frankfurter's live feed of European Central Bank reference rates, refreshed each time you open or refresh the Currency tab.
  • From currency — the currency you're converting out of (e.g. USD).
  • To currency — the currency you want the result in (e.g. EUR).
  • Amount — the quantity being converted; it's multiplied by the live rate.

How much is Bitcoin or Ethereum worth in dollars?

Quick answerBitcoin, Ethereum, and other cryptocurrencies trade around the clock on global exchanges, priced in US dollars. USD value = coin amount × live USD price per coin. This tool fetches the current price (and 24-hour change) for Bitcoin, Ethereum, Solana, and Dogecoin from CoinGecko's public API, so the Crypto tab always reflects the latest available price when you load or refresh it.

The crypto converter works the same way in reverse or between two coins: an amount of one coin is first turned into its USD value, then divided by the USD price of the target coin. Because crypto prices can move sharply within minutes, treat the figures as a snapshot at the moment you loaded the page, not a locked-in rate.

How do you calculate the value of gold by weight?

Quick answerGold value = weight in grams × (spot price ÷ 31.1035) × purity fraction, where 31.1035 grams is one troy ounce. Purity depends on karat: 24K ≈ 0.999, 22K ≈ 0.9167, 18K = 0.75, 14K ≈ 0.5833, 10K ≈ 0.4167. For example, if gold spot is $2,400/oz, 10 grams of 14K gold ≈ 10 × (2400 ÷ 31.1035) × 0.5833 ≈ $450.

Silver is calculated the same way, using its own spot price and purity (fine silver .999, sterling .925, or coin silver .900 are the most common). Because there's no reliable free live feed for metals, this math only runs once you've typed in today's spot price in the Gold & Silver tab.

What is a troy ounce, and why does gold use it?

Quick answerA troy ounce is the standard weight unit for precious metals and equals about 31.1034768 grams — heavier than a regular (avoirdupois) ounce of 28.35 grams. When a gold or silver spot price is quoted "per ounce," it almost always means a troy ounce, which is why this tool's math divides by 31.1035, not 28.35.

Why isn't there a live gold or silver price in this tool?

Quick answerUnlike currency exchange and crypto markets, there is no free, reliable, no-signup API for live gold and silver spot prices. Rather than show a number that could be stale or simply wrong, this tool asks you to check today's spot price from a source you trust and type it in — then it handles every calculation for you, instantly and transparently.

Mini tools used above

Quick recap of the calculators built into each tab: a crypto value/converter pair, a gold & silver value-by-weight tool, and a troy-ounce/gram converter.

₿ Crypto value calculatorPick a coin and an amount to see its live US-dollar value, in the Crypto tab.
🔄 Crypto converterConvert between any two of Bitcoin, Ethereum, Solana, Dogecoin, and USD via live prices.
⚖️ Gold & silver value by weightEnter a weight and karat/purity to get a total dollar value from the spot price you typed in.
🔁 Troy oz ↔ gram converterPure unit conversion between troy ounces, grams, and pennyweight (dwt) — no spot price required.
🪙 Gold coin melt-value calculatorPick a named bullion coin (Eagle, Krugerrand, Maple Leaf, Sovereign, Britannia) to see its pure-gold content and melt value.

Reference tables

Evergreen reference facts: karat and purity fractions, troy-ounce weight conversions, and a worked (illustrative) currency-conversion example.

Gold karat and silver purity, as a fraction of fine metal
TypePurityFine metal per gram
24K gold (fine)99.9%≈ 0.999 g
22K gold91.7%≈ 0.917 g
18K gold75.0%≈ 0.750 g
14K gold58.3%≈ 0.583 g
10K gold41.7%≈ 0.417 g
Fine silver (.999)99.9%≈ 0.999 g
Sterling silver (.925)92.5%≈ 0.925 g
Coin silver (.900)90.0%≈ 0.900 g

Jewelry value ≈ weight (g) × 24K price per gram × purity fraction, before workmanship or retail markup.

Troy ounce and common weight conversions
UnitEquals
1 troy ounce31.1034768 grams
1 troy ounce1.09714 standard (avoirdupois) ounces
1 troy ounce20 pennyweight (dwt)
1 pennyweight (dwt)1.55517 grams
1 gram0.032151 troy ounces
1 kilogram32.1507 troy ounces
1 standard pound (lb)14.5833 troy ounces

Gold and silver spot prices are always quoted per troy ounce, not the everyday (avoirdupois) ounce.

Illustrative example only — not a current rate; use the live calculator above
If 1 USD = 0.90 EUR (example)Result
10 USD9.00 EUR
100 USD90.00 EUR
500 USD450.00 EUR
1,000 USD900.00 EUR

This table uses a made-up rate (0.90) purely to show the math: amount × rate = result. Today's actual USD/EUR rate is shown live in the Currency tab above.

Currency, crypto & metals glossary

Short definitions of the core terms used across exchange rates, crypto prices, and precious-metal pricing.

Exchange rateHow much of one currency you get for one unit of another. Changes constantly with the foreign-exchange market.
Base currencyThe currency an exchange rate is quoted against. This tool's live rates use USD as the base.
Cross rateAn exchange rate between two non-USD currencies, derived by routing the calculation through USD.
Spot priceThe current market price to buy or sell an asset (currency, crypto, or metal) immediately, for delivery "on the spot."
Troy ounceThe standard weight unit for precious metals, equal to about 31.1035 grams.
Pennyweight (dwt)A jeweler's weight unit equal to 1/20 of a troy ounce, or about 1.5552 grams — commonly used for gold and silver jewelry.
Karat (K)A measure of gold purity out of 24 parts. 24K is (nearly) pure gold; lower karats are alloyed with other metals.
Fine / sterling silverFine silver is 99.9% pure; sterling silver (92.5%) is the common alloy used in jewelry and flatware.
StablecoinA cryptocurrency designed to hold a steady value, usually pegged to the US dollar (e.g. USDT, USDC).
24-hour changeThe percentage move in a crypto asset's price over the last 24 hours; green for a gain, red for a loss.
VolatilityHow much and how fast a price swings. Cryptocurrencies are typically far more volatile than major currencies.

In-depth guides

Step-by-step explanations of the most commonly asked currency, crypto, and gold questions.

How to convert USD to another currency, step by step

Step 1: Open the Currency tab and let the live rate load (it fetches automatically, or press Refresh).
Step 2: Enter the amount, choose USD as the "From" currency, and pick your target currency.
Step 3: Read the result — the big number is the converted amount, and the badge underneath shows the exact rate used (1 unit of the source currency in the target currency).

If you need the opposite direction (say, EUR to USD), just press the swap button (⇅) between the two selects, or pick EUR as "From" and USD as "To" directly.

How to calculate the value of gold jewelry by karat

Step 1: Look up today's gold spot price (per troy ounce, in US dollars) from a source you trust, and type it into the Gold spot price field in the Gold & Silver tab.
Step 2: In the "Value by weight" tool, pick the karat that matches your item (24K, 22K, 18K, 14K, or 10K) and enter its weight in grams (or troy ounces).
Step 3: Press Calculate. The tool multiplies weight × price-per-gram-at-24K × the karat's purity fraction to estimate the melt value.

Keep in mind this gives the raw metal value only — it does not include a jeweler's workmanship, brand premium, or any gemstones the piece may contain.

How to calculate the melt value of a gold coin (Eagle, Krugerrand, Maple Leaf, Sovereign, Britannia)

Step 1: Enter today's gold spot price in the Gold spot price field in the Gold & Silver tab.
Step 2: In the "Gold coin melt-value calculator," pick the coin you own — American Gold Eagle, Krugerrand, Canadian Maple Leaf, British Sovereign, or Britannia — and enter how many you have.
Step 3: Press Calculate. Each coin has a different gross weight and purity built in, so the tool works out the pure-gold content first, then its dollar value at the spot price.

A 1 oz American Eagle or Krugerrand is 22K (.9167 purity) with a gross weight around 33.93 grams, so each still contains exactly 1 troy ounce of pure gold. A 1 oz Maple Leaf or Britannia is .9999 fine and weighs closer to 31.10 grams gross. A Sovereign is much smaller — about 7.988 grams gross, 22K — and contains roughly a quarter troy ounce of pure gold. This is melt value only; numismatic (collector) premiums for rare dates or grades are not included.

Why currency and crypto prices are live here, but gold and silver are not

Currency exchange rates and cryptocurrency prices are published through mature, free, CORS-enabled public APIs — Frankfurter (built on European Central Bank data) and CoinGecko — so this tool can fetch them directly in your browser every time you load or refresh the page.

Precious metals don't have an equivalent free, no-signup, reliable live feed. Rather than hardcode a number that would go stale the moment gold or silver moves, or point you to a source that might disappear, this tool is upfront: you enter today's spot price, and it does the gram/troy-ounce/karat math instantly and transparently from there.

Frequently asked questions

What is 1 US dollar worth in euros today?
The USD to EUR exchange rate changes constantly in the foreign-exchange market. This tool fetches the live USD/EUR rate from Frankfurter, which republishes European Central Bank reference rates, so you always see an up-to-date conversion. Enter an amount in the Currency tab with USD as the source and EUR as the target to see the current converted value and the exact rate used.
How much is Bitcoin or Ethereum worth in dollars right now?
Cryptocurrency prices are highly volatile and change by the second across global exchanges. This tool fetches live Bitcoin, Ethereum, Solana, and Dogecoin prices in US dollars from CoinGecko's public API. Open the Crypto tab to see the current price and 24-hour change for each coin, or use the converter to find the USD value of any amount.
How do you calculate the value of gold from its spot price?
Gold value = weight in grams × (spot price ÷ 31.1035) × purity fraction, where 31.1035 grams is one troy ounce and the purity fraction reflects the karat (24K = 0.999, 22K = 0.9167, 18K = 0.75, 14K = 0.5833, 10K = 0.4167). For example, if gold spot is $2,400/oz, one gram of 24K gold is worth about 2400 ÷ 31.1035 ≈ $77.16, and 10 grams of 14K gold would be worth about 10 × 77.16 × 0.5833 ≈ $450.
What is a troy ounce?
A troy ounce is the standard unit for pricing precious metals like gold and silver. It equals about 31.1034768 grams, which is heavier than a standard (avoirdupois) ounce of 28.35 grams. Spot prices for gold and silver quoted "per ounce" almost always mean a troy ounce.
What is the difference between 24K, 22K, 18K, 14K, and 10K gold?
Karat measures gold purity out of 24 parts. 24K is essentially pure gold (99.9%), 22K is about 91.7% gold, 18K is 75%, 14K is about 58.3%, and 10K is about 41.7% gold mixed with other metals for durability. Lower-karat gold is harder and cheaper but contains less actual gold, so its melt value is proportionally lower.
Is silver priced and calculated the same way as gold?
Yes, the math is the same: silver is also quoted per troy ounce, and its melt value equals weight in grams × (spot price ÷ 31.1035) × purity. Common silver purities are fine silver (.999), sterling silver (.925, used in jewelry and flatware), and coin silver (.900).
Are the exchange rates and crypto prices on this page live?
Yes. Currency conversion uses Frankfurter, which republishes European Central Bank reference exchange rates, and cryptocurrency prices come from CoinGecko's public market-data API. Both are fetched directly in your browser each time you open or refresh that tab. Gold and silver prices are the exception — see the next question.
Why do I have to enter the gold and silver spot price myself?
There is no free, reliable, no-signup API that provides live gold and silver spot prices, unlike currency and crypto markets. Rather than showing a stale or inaccurate number, this tool asks you to check today's spot price from a source you trust (your bank, a bullion dealer, or a market-data site) and enter it manually. The tool then handles all the gram, troy-ounce, and karat math for you.
Is this tool financial advice?
No. This calculator performs standard currency, crypto, and precious-metal math for informational purposes only. Exchange rates, crypto prices, and metal values shown here can differ from the rates you actually get from a bank, exchange, or dealer once fees and spreads are included. Always confirm current rates with your financial institution before making a transaction.
How do you calculate the melt value of a gold coin like a Krugerrand or American Eagle?
Melt value = coin's gross weight in grams × purity fraction × (gold spot price ÷ 31.1035). Common bullion coins differ in both gross weight and purity: a 1 oz American Eagle and 1 oz Krugerrand are 22K (.9167 purity) with a gross weight around 33.93 grams, so each contains exactly 1 troy ounce of pure gold, while a 1 oz Canadian Maple Leaf or Britannia is .9999 fine and weighs about 31.10 grams. A British Sovereign is smaller and 22K, at about 7.988 grams gross. This tool's gold-coin calculator has these five coins built in — pick one, and it computes the pure-gold content and melt value from the spot price you entered.

Methodology & sources

ToolPico's Currency, Crypto & Gold Calculator is a free, independent tool. Currency conversion is fetched live from Frankfurter (api.frankfurter.app), which republishes European Central Bank reference exchange rates, based at 1 US dollar. Cryptocurrency prices for Bitcoin, Ethereum, Solana, and Dogecoin are fetched live from CoinGecko's public API (api.coingecko.com), in US dollars with 24-hour percentage change. Both fetches happen directly in your browser, with an 8-second timeout and a manual Refresh option if a request fails — neither request is retried against any other server, since both are already free, CORS-enabled, no-signup sources. Gold and silver values are computed entirely client-side from a spot price (US dollars per troy ounce) that you enter yourself: price per gram = spot price ÷ 31.1034768, and karat/purity value = weight in grams × price per gram at 24K/.999 × purity fraction. The named gold-coin calculator uses standard reference gross weights and purities per coin (1 oz American Eagle/Krugerrand ≈ 33.93 g at .9167 purity; 1 oz Maple Leaf/Britannia ≈ 31.10 g at .9999 purity; Sovereign ≈ 7.988 g at .9167 purity) and computes melt value the same way. Pennyweight (dwt) conversions use 1 dwt = 1/20 troy ounce = 1.55517384 grams.

Sources & assumptions: Frankfurter / European Central Bank reference rates (currency) · CoinGecko public market data (crypto) · standard karat purity fractions (24K/22K/18K/14K/10K) and silver purities (.999/.925/.900) · standard bullion-coin gross weights and purities (Eagle, Krugerrand, Maple Leaf, Sovereign, Britannia) · 1 troy ounce = 31.1034768 grams = 20 pennyweight (dwt). No gold or silver price is fetched, guessed, or embedded as a stale snapshot — the metals tab is manual-entry by design. Last updated: July 21, 2026. Results are for informational purposes only; they are not financial or investment advice and may differ from the actual rate offered by your bank, exchange, or dealer.

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