Calculate
Bond assumptions
BNDThe reference page calculates after submit and separates coupon-date pricing from between-coupon pricing. This version keeps both bond tools on one page and updates the solved values, chart, and pricing table live.
Finance directory
Open categoryThis calculator is part of the finance section. Keep the current tool open for calculation, then use the related calculators below to compare nearby planning tasks.
Finance calculator
Bond Calculator
Use a bond calculator to solve standard coupon-bond values or switch to bond pricing mode to estimate dirty price, clean price, and accrued interest when a bond trades between coupon dates.
How to use this calculator
How this bond calculator works
The first mode is designed for fixed-rate coupon bonds valued on a coupon date. It lets you solve for price, face value, yield, annual coupon, or time to maturity from the other assumptions. The second mode values a bond between coupon dates, which is why it separates dirty price, clean price, and accrued interest.
- Use Bond Calculator mode when the bond is issued or traded on a coupon date and you want to solve one missing bond input from the others.
- Use Bond Pricing Calculator mode when the settlement date falls between coupon payments and you need dirty price, clean price, accrued interest, and coupon timing.
- Review coupon frequency and day-count convention carefully, because both affect accrued interest and the invoice price paid between coupon dates.
Formula / method
Formula / method
This bond calculator uses the existing ToolModule calculation model for the inputs shown above. The page keeps the original formulas and result logic intact, then presents the output in a clearer working layout.
- Start with the required inputs in the form above.
- The calculator applies the existing ToolModule calculation logic for this tool.
- Review the result cards, tables, and charts together before making a real-world decision.
Example calculation
Review the current live example
The example below reflects the current values shown in the calculator above, so it updates as you change the form without altering the calculation logic itself.
Example inputs
Solve forPrice
Face value100
Yield (%)6
Time to maturity (years)3
Annual coupon (%)5
Example outputs
Solved fieldPrice
Solved value$97.29
Price$97.29
Face value$100.00
Disclaimer
Use results as planning guidance only
Results are for reference only and do not constitute financial, investment, tax, or legal advice. Product terms, lender rules, tax treatment, and fees can vary in real situations.
- Do not treat calculator output as financial, investment, medical, or legal advice.
- Check assumptions, dates, tax rules, and provider-specific terms before acting on a result.
- Use official documents or professional guidance when the decision has material consequences.
FAQ
Common Bond questions
What is the difference between bond price and dirty price?
A bond price quoted on a coupon date reflects the present value of future coupon payments and principal repayment. Dirty price is the invoice price paid between coupon dates, which includes accrued interest on top of the clean market price.
What is the difference between clean price and dirty price?
Clean price excludes accrued interest and is the price most commonly quoted in the market. Dirty price equals clean price plus accrued interest and reflects the total amount paid by the buyer on settlement.
Why does coupon frequency matter in bond pricing?
Coupon frequency changes both the size and timing of coupon cash flows. That affects the present value calculation, accrued interest, and the number of discount periods remaining until maturity.