Salary Calculator
Estimate monthly and yearly take-home salary after deductions.
💱 Live mid-market rates · 37 currencies
Currency Converter
Convert BDT, USD, EUR, GBP, INR, SAR and 30+ currencies using live mid-market rates from open.er-api.com — with reverse rate and round-trip verification.
Step By Step
How to Use This Calculator
5 steps
- Enter the amount you want to convert in the Amount field.
- Select your source currency in the 'From' dropdown — full currency names are shown alongside the code (e.g. BDT — Bangladeshi Taka).
- Select the target currency in the 'To' dropdown, or tap ⇄ to swap the two currencies instantly.
- Read the primary result (converted amount) and the two detail tiles: the reverse rate and a round-trip figure to verify accuracy.
- Check the rate timestamp below the result — if it shows 'reference rates', live data was unavailable and the amber banner explains the fallback.
Worked Example
Example: salary remittance BDT → SAR
Use this sample to sanity-check your inputs and understand what the final result represents.
- 1Amount: 50,000
- 2From: BDT (Bangladeshi Taka)
- 3To: SAR (Saudi Riyal)
Final Result
≈ 1,704 SAR at mid-market · 1 BDT = 0.0341 SAR · 1 SAR = 29.33 BDT (illustrative; live rate shown on page)
Methodology
Conversion formula & data source
This section explains the calculation logic, assumptions, and source material used to make the result more trustworthy and easier to verify.
All rates are stored as units per USD. Converted amount = Input × (Rate_Target ÷ Rate_Source). Reverse rate = Rate_Source ÷ Rate_Target. Round-trip = convert result back to source currency using the same rates — any deviation is floating-point rounding, not spread. Live data: open.er-api.com (daily mid-market, sourced from financial data aggregators). Reference: IMF — Exchange Rate Arrangements and Restrictions; Bangladesh Bank daily rate bulletin (bb.org.bd).
Helpful tips
- 1Mid-market rates are the global benchmark — banks and mobile wallets (bKash, Nagad) add a 0.5%–3% spread on top, so your actual cost will be higher.
- 2Use the ⇄ swap button to instantly check the reverse rate without re-entering values.
- 3For remittances to Saudi Arabia, UAE, or Malaysia, check the rate on the day of transfer — rates can shift 1%–2% within a week.
- 4The round-trip tile converts the result back to your source currency; it should closely match your original amount — any large gap means the rate moved between API calls.
Frequently Asked Questions
Where do the exchange rates come from?+
Live rates are fetched from open.er-api.com, a public exchange-rate API that sources data from financial data providers and updates rates daily. The rates shown are mid-market rates — the midpoint between buy and sell prices on global currency markets. If the live fetch fails, the tool falls back to built-in reference rates from early 2025 and shows a warning banner.
What is the mid-market rate and why does it differ from my bank?+
The mid-market (or interbank) rate is the benchmark exchange rate at which banks trade currency with each other. Retail banks, mobile wallets (bKash, Nagad), and remittance services add a spread — typically 0.5%–3% — on top of this rate, plus fixed fees. That is how they make money on currency exchange. This tool shows the mid-market rate for reference; your actual cost will be higher.
What is the conversion formula?+
All currencies are stored as units per USD. To convert from currency A to currency B: Converted = Amount × (Rate_B ÷ Rate_A). For example, BDT to EUR: Amount × (0.92 ÷ 110). The reverse rate shown (1 B = x A) is simply Rate_A ÷ Rate_B. The round-trip tile converts the result back to the original currency — any difference from the amount you entered reflects rounding at 4 decimal places.
What does the round-trip figure mean?+
The round-trip converts the result back into your original currency using the same rates. In an ideal zero-spread world it would equal your original amount exactly. In practice it shows the rounding error from 4-decimal-place rates — typically less than ±0.01 for amounts under 1 million. It is a quick sanity-check tile, not a representation of real buy/sell spread.
How often are rates updated?+
The open.er-api.com free tier updates rates once per day, usually in the early UTC hours. The rate timestamp displayed below the result shows the exact last-update time. For real-time intraday rates needed for trading, use a professional financial data provider.
Can I use this for official remittance or business invoicing?+
No — this tool is for estimates and planning only. For formal remittances, bank transfers, or foreign-currency invoices, use the actual rate quoted by your bank or licensed money transfer operator at the time of the transaction. Bangladesh Bank publishes daily indicative rates for BDT pairs at bb.org.bd.