Fidamen

Bond Price Calculator

This advanced bond price calculator computes the clean price, dirty price, accrued interest and present values of coupon and principal given standard inputs: face value, coupon rate, years to maturity, payment frequency and yield to maturity.

The tool provides a component-level breakdown so traders, portfolio managers, and auditors can verify each intermediate step. It also includes guidance on model scope, numerical limits and accuracy expectations.

Updated Nov 8, 2025QA PASS — golden 25 / edge 120Run golden-edge-2026-01-23

Governance

Record 715cd4ead060 • Reviewed by Fidamen Standards Committee

Compute bond dirty and clean prices given an annual yield to maturity, coupon rate, term and payment frequency using standard present-value formulas.

Inputs

Results

Updates as you type

Clean price

$1,044.91

Dirty price

$1,044.91

Accrued interest

$0.00

PV of coupons

$224.56

PV of principal

$820.35

OutputValueUnit
Clean price$1,044.91USD
Dirty price$1,044.91USD
Accrued interest$0.00USD
PV of coupons$224.56USD
PV of principal$820.35USD
Primary result$1,044.91

Visualization

Methodology

Prices are calculated by discounting the fixed coupon payments and final principal at the periodic discount factor derived from the annual yield: discount per period = 1 + (yield / coupon frequency). The coupon stream uses the closed-form geometric series present-value formula.

Design, testing and documentation practices reference NIST and ISO software quality and testing guidance; numerical handling follows IEEE floating-point recommendations. Users should be aware of domain limits and verify results for extreme inputs.

This calculator provides theoretical mathematical pricing; it does not include market spreads, liquidity discounts, taxes, or embedded option features such as call/put schedules.

F.A.Q.

Does this calculator handle bonds with embedded options (calls or puts)?

No. Embedded options change cashflow timing and require option-adjusted valuation. Use specialized option-adjusted models for callable or putable bonds.

What day-count convention should I use?

Select the convention that matches the bond documentation. The day-count affects accrued interest calculation and cashflow fractions; this tool uses a user-supplied accrued fraction for precise control.

How accurate are results near very high frequencies or extremely long maturities?

Floating-point rounding can affect results for very large N or tiny yields. Follow IEEE floating-point recommendations for extreme cases and cross-check with arbitrary-precision or validated libraries when required.

Can I derive yield to maturity from a market price using this tool?

The present methods compute price from yield. Yield-from-price requires iterative root-finding (not provided here). Use a solver that applies robust bracketing and convergence checks and validate against standard references.

What testing and quality standards were considered building this calculator?

Design and validation recommendations referenced NIST guidance for software testing, ISO quality management principles, and IEEE standards for numerical behavior. Operational safety and compliance considerations reference general OSHA guidance for workplace procedures.

Sources & citations

Further resources

Versioning & Change Control

Audit record (versions, QA runs, reviewer sign-off, and evidence).

Record ID: 715cd4ead060

What changed (latest)

v1.0.0 • 2025-11-08 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Public QA status

PASS — golden 25 + edge 120

Last run: 2026-01-23 • Run: golden-edge-2026-01-23

Engine

v1.0.0

Data

Baseline (no external datasets)

Content

v1.0.0

UI

v1.0.0

Governance

Last updated: Nov 8, 2025

Reviewed by: Fidamen Standards Committee (Review board)

Credentials: Internal QA

Risk level: low

Reviewer profile (entity)

Fidamen Standards Committee

Review board

Internal QA

Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person

Semantic versioning

  • MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
  • MINOR: New features or fields that do not change existing outputs for the same inputs.
  • PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.

Review protocol

  • Verify formulas and unit definitions against primary standards or datasets.
  • Run golden-case regression suite and edge-case suite.
  • Record reviewer sign-off with credentials and scope.
  • Document assumptions, limitations, and jurisdiction applicability.

Assumptions & limitations

  • Uses exact unit definitions from the Fidamen conversion library.
  • Internal calculations use double precision; display rounding follows the unit's configured decimal places.
  • Not a substitute for calibrated instruments in regulated contexts.
  • Jurisdiction-specific rules may require official guidance.

Change log

v1.0.0 • 2025-11-08 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: efefecccbc7c