currency exchange calculator

Convert Currency units, compare 153 unit definitions and explore formulas, examples and common questions.

Currency converter

US Dollar to Euro
Converted value

100US Dollar≈89.99Euro

Enter a finite value between 0 and 1 trillion, with up to 8 decimal places.

Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.

Current reference rates

Reference rates available

1 US Dollar ≈ 0.8999 Euro

1 Euro ≈ 1.1112346 US Dollar

Rates as of
Expected update

Reference rates are not an offer to exchange money. Bank spreads, fees and settlement times can change the amount you receive.

Complete unit directory153 units

Choose a source unit to see every available target unit. Each directory has a stable address.

How to use this calculator

  1. Enter the value you want to convert.
  2. Choose the source and target units, then adjust the display precision if needed.
  3. Read the result. Select Convert to open a page for this value, or use the table below.

Definitions and assumptions

Currency conversion uses two quotes relative to the same base currency from one accepted snapshot. Reference quotes can differ from cash, card, bank-buying, bank-selling or settlement rates.

Frequently asked questions

Which Currency units are supported?

The directory lists 153 units, including symbols and availability. Choose any source unit to browse its target units.

how to convert USD to EUR?

Target amount = source amount × target quote ÷ source quote. Both quotes must use the same base currency and snapshot. 100 × 0.8999 ≈ 89.99 Euro. Rates as of: Nov 12, 2026. Reference rates are not an offer to exchange money. Bank spreads, fees and settlement times can change the amount you receive.

Where do the exchange rates come from?

Calculations use the most recently validated and saved reference rates. The rate card above shows the quotation time and expected next update. Fees and bank spreads may change the amount you receive.

How often are exchange rates updated?

Updates depend on the configured data feed. Check the snapshot time and expected next update. If the freshness limit is exceeded, the page explicitly marks the quote as out of date.

Does the result include bank fees?

No. It is a reference conversion. A bank or payment provider may apply a spread, fixed fees, percentage fees or a different settlement rate.

What happens if a rate update fails?

Invalid updates are rejected. The previous valid snapshot is retained and its timestamp remains visible. If no usable quote exists, the page displays an unavailable state instead of a number.

Why is a unit unavailable?

A conversion is unavailable when a verified unit definition or a current exchange-rate value has not been configured. The tool does not invent a coefficient.

Methods and sources

Target amount = source amount × target quote ÷ source quote. Both quotes must use the same base currency and snapshot.

Methods and sources · Content revised

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