Currency Converter

What is the currency converter?

This currency converter changes an amount from one currency into another using exchange rates that you control. Unlike converters that call a live API, it ships with a static, editable rate table so it keeps working offline and never sends your amounts to a third party. You update the rates whenever you like — a good fit for quick estimates, travel budgeting or embedding into a privacy-first workflow.

How it works

All rates are stored relative to a single base currency (USD). To convert from currency A to currency B, the tool first converts the amount into the base (amount ÷ rateA) and then into the target (× rateB). Because every currency is anchored to the same base, any pair can be derived from the table without listing every combination. You can edit any rate in the table; your changes are saved in your browser's local storage so they persist between visits.

Worked example

Say the table lists 1 USD = 0.92 EUR and 1 USD = 83 INR. To convert 100 EUR to INR, the tool divides by the EUR rate (100 ÷ 0.92 = 108.70 USD) and multiplies by the INR rate (108.70 × 83 = 9,022 INR). If you later change the EUR rate to 0.90, the same conversion updates instantly to about 9,222 INR.