Tools
Calculators & tools
Estimate inflation and take-home pay, check market hours, browse live exchange rates, and—when the finance module is enabled—plan savings, measure returns, model mortgages, and convert currencies. All in your browser.
Compound interest calculator
Project how regular contributions and compounding grow your balance over time.
Added each month
Final balance
$54,915.51
- Total contributions
- $34,000.00
- Total interest earned
- $20,915.51
ROI calculator
Measure total return, profit or loss, and annualized performance over your holding period.
Total ROI
45.00%
Over 5 years
- Net profit / loss
- $22,500.00
- Annualized return
- 7.71%
Annualized return uses CAGR: compound growth rate from initial to final value over the period entered.
Mortgage calculator
Estimate fixed-rate monthly payments and lifetime interest on a standard repayment loan.
Monthly payment
$2,216.58
$360,000.00 loan · 30 years
- Total interest paid
- $437,969.49
- Total amount paid
- $797,969.49
Currency converter
Convert between major currencies using live ECB reference rates from Frankfurter—no API key required.
Waiting for a valid exchange rate…
Inflation calculator
See how an amount grows with a user-defined average annual inflation rate between two years. This is a simple estimate—not official CPI data.
Default ~3%. Adjust to match your assumption.
Equivalent value (end year)
$13,439.16
Estimate based on the inflation rate you entered—not official statistics.
- Original amount (start year)
- $10,000.00
- Total change
- 34.39%
- Years
- 10
Salary / take-home estimator
Estimate net pay from gross income using an adjustable tax rate and optional deductions. Not country-specific tax law—a quick illustration only.
Single blended rate—adjust for your situation.
Benefits, retirement, etc. (annual total)
Estimated take-home (annual)
$56,250.00
Simple estimate only—not payroll or tax advice.
- Estimated take-home (monthly)
- $4,687.50
- Gross (annual)
- $75,000.00
- Estimated tax
- $18,750.00
Market hours
Check whether major stock exchanges are open right now, using each market's local trading hours and your device's clock.
Status updates every 30 seconds. Times shown in each exchange's local time zone.
Does not account for public holidays, early closes, or special sessions.
0 of 4 exchanges open
- Closed
NYSE (New York)
19:52:40 · Mon–Fri 9:30–16:00 ET
- Closed
LSE (London)
00:52:40 · Mon–Fri 8:00–16:30 GMT
- Closed
TSE (Tokyo)
08:52:40 · Mon–Fri 9:00–15:00 JST (lunch 11:30–12:30)
- Closed
Frankfurt (XETRA)
01:52:40 · Mon–Fri 9:00–17:30 CET
Live exchange rates
Major currency crosses from Frankfurter (ECB reference data). Pick a base currency to see rates for the rest.
Rates via api.frankfurter.dev. No API key required.
Waiting for exchange rates…
Calculators are for illustration only and do not constitute professional advice. Exchange rates are indicative ECB reference data via Frankfurter. Market hours do not reflect exchange holidays.