About BondCalculator.in

Professional Bond Analytics

BondCalculator.in is a professional online bond calculator designed for investors, analysts, students, traders, and finance professionals. It calculates Bond Price, Yield to Maturity (YTM), Current Yield, Yield to Call (YTC), Yield to Put (YTP), Yield to Worst (YTW), Accrued Interest, Duration, Modified Duration, Convexity and DV01 using exact cash-flow dates. The calculator supports government bonds, corporate bonds, zero-coupon bonds, callable bonds, puttable bonds, amortizing bonds and fully custom cash-flow schedules.

All calculations are performed locally within your browser for speed and privacy. No bond data is transmitted to our servers. Please refer to our Privacy Policy for additional information.

Pricing engine

Every cash flow is discounted individually from its exact date back to the settlement date:

DF = (1 + y/m)^(−m × t)

where y is the annualized yield, m is the compounding frequency, and t is the exact year-fraction between settlement and the cash-flow date under the selected day-count convention. Price is the sum of each cash flow multiplied by its discount factor. This "exact-date" approach is a standard alternative to period-counting conventions, and is well suited to irregular or exotic schedules where cash flows don't fall on neat, evenly spaced dates.

Day-count conventions

• Actual/Actual (ISDA) — days are counted exactly and split across calendar years using each year's true length (365 or 366 days).
• Actual/365 — exact days divided by a fixed 365-day year.
• Actual/360 — exact days divided by a fixed 360-day year (common in money markets).
• 30/360 US — each month is treated as having 30 days, per the standard US bond-market convention.

Yield to Maturity (YTM)

YTM is solved by bisection: the tool searches for the annualized yield that makes the present value of all future cash flows equal the dirty price paid. Clean price is the price you enter or see quoted; dirty price adds accrued interest since the last coupon date.

Yield to Call, Yield to Put, and Yield to Worst

For each call or put date you define, the tool builds a truncated cash-flow schedule: every coupon up to and including the option date, plus the strike/redemption price paid on exercise (the coupon due on that date, if any, is included alongside the strike — not replaced by it). It then solves for the yield that reprices that truncated schedule to the same price you actually paid for the bond.

• Yield to Call (YTC) — the lowest yield across all call scenarios. Calls are the issuer's option, so this represents the yield you'd earn if the issuer chose to redeem early.
• Yield to Put (YTP) — the lowest yield across all put scenarios, shown for reference. Puts are the investor's option — you would only exercise a put when it's favorable to you — so it isn't combined into a single "worst case" the way calls are.
• Yield to Worst (YTW) — min(YTM, YTC). This is the standard market convention: the worst outcome an investor could face from redemption risk that isn't under their own control.

Duration, convexity, and DV01

Macaulay duration is the present-value-weighted average time to each cash flow. Modified duration is Macaulay duration divided by (1 + y/m), giving the approximate percentage price change for a 1% (100 bp) move in yield. Convexity is the second-order term, computed from the closed-form derivative of the pricing formula above. DV01 approximates the price change, in currency terms, for a 1 basis-point (0.01%) move in yield.

Limitations

• This tool is for education, review, and analysis — it is not financial, investment, tax, or legal advice.
• Always verify results independently, especially for real trading, valuation, or reporting decisions.
• Complex real-world instruments (sinking funds with random-lot calls, make-whole calls, floating-rate resets, embedded caps/floors) may need structuring as custom cash flows and careful interpretation of the scenario outputs.