Best Free Online Calculators in 2025
Duct Size Calculator Calculate the perfect duct size for your HVAC system. Get accurate results in seconds. Airflow (CFM): Typical range: 100-2000 CFM Air Velocity (FPM): Recommended: 700-900 FPM for supply, 500-700 FPM for return Calculate Duct Size Round Duct Diameter — inches Rectangular Duct Size — inches Cross-Sectional Area … Read more
Bond Option Price Calculator Current Bond Price ($) Strike Price ($) Time to Maturity (Years) Volatility (%) Risk-Free Rate (%) Option Type Call OptionPut Option Calculate Option Price Results Option Price: $0.00 Delta: 0.00 Option Status: At-the-Money About Bond Options This calculator estimates bond option prices using the Black-Scholes model. … Read more
Bond Par Value Calculator Annual Coupon Payment ($) Coupon Rate (%) Yield to Maturity (%) Years to Maturity Compounding Frequency AnnualSemi-AnnualQuarterlyMonthly Calculate Par Value Results Par Value (Face Value): $0.00 Current Bond Price: $0.00 Bond Status: Trading at Par About Par Value This calculator helps you determine: The face value … Read more
Bond Premium Calculator Face Value ($) Coupon Rate (%) Market Yield (%) Years to Maturity Compounding Frequency AnnualSemi-AnnualQuarterlyMonthly Calculate Premium Results Bond Price: $0.00 Premium/Discount: $0.00 Premium Percentage: 0.00% Bond Status: Trading at Par About Bond Premiums This calculator helps you determine: If a bond is trading at a premium … Read more
Bond Convexity Calculator Face Value ($) Coupon Rate (%) Yield to Maturity (%) Years to Maturity Compounding Frequency AnnualSemi-AnnualQuarterlyMonthly Calculate Convexity Results Bond Price: $0.00 Macaulay Duration: 0.00 years Modified Duration: 0.00 years Convexity: 0.00 Price Change for 1% Yield Change: $0.00 (0.00%) About Bond Convexity This calculator helps you … Read more
Bond Volatility Calculator Face Value ($) Coupon Rate (%) Yield to Maturity (%) Years to Maturity Compounding Frequency AnnualSemi-AnnualQuarterlyMonthly Calculate Volatility Results Bond Price: $0.00 Macaulay Duration: 0.00 years Modified Duration: 0.00 years Price Change for 1% Yield Change: $0.00 (0.00%) About Bond Volatility This calculator helps you understand bond … Read more
Bond Swap Calculator Compare two bond investments. See potential gains from swapping bonds. Make smarter fixed-income decisions. Current Bond New Bond Price ($) Yield (%) Years to Maturity Investment Amount ($) Price ($) Yield (%) Years to Maturity Investment Amount ($) Calculate Swap ⇄ Swap Analysis 💰 Annual Income Change … Read more
Bond Yield Spread Calculator Compare bond yields and calculate spreads. See how different bonds perform against benchmarks. Make better investment decisions. Benchmark Bond Yield (%) Type Treasury BondCorporate BondMunicipal BondOther Comparison Bond Yield (%) Type Treasury BondCorporate BondMunicipal BondOther Credit Rating AAAAAABBBBBBCCC Calculate Spread → Yield Spread 0.00% Treasury: 3.50% … Read more
Bond Risk Calculator Estimate the risks associated with your bond investments. Adjust the sliders to see how different factors affect your bond’s risk profile. Bond Face Value ($) $10,000 Interest Rate (%) 5% Years to Maturity 10 years Credit Rating AAA (Highest Quality)AA (High Quality)A (Upper Medium Grade)BBB (Medium Grade)BB … Read more
Bond Yield Calculator Calculate the yield, current value, and return on investment (ROI) for any bond investment. See how much your bond is worth today. Face Value ($): Coupon Rate (%): Current Market Price ($): Years to Maturity: Calculate Yield Your Bond Yield Results Face Value: – Annual Coupon Payment: … Read more