About accruedinterest.com
A free online toolkit for bond and fixed-income calculations.
accruedinterest.com is a free online toolkit for bond and fixed-income calculations.
The site is designed to make common bond calculations faster, clearer, and easier to verify without requiring access to expensive market terminals or specialist software.
What You Can Calculate
accruedinterest.com provides tools for common fixed-income calculations, including:
- accrued interest
- day count conventions
- bond yields
- duration and related measures
- settlement-based calculations
- other bond mathematics and market convention tools
The goal is to provide practical calculators that are straightforward to use while remaining transparent about the assumptions and conventions behind the results.
Built for Clarity
Fixed-income calculations can look simple while depending heavily on details such as settlement dates, coupon schedules, day count conventions, frequency, maturity structure, and market-specific rules.
accruedinterest.com aims to make those mechanics easier to understand.
Where practical, calculators are designed to show the relevant inputs, conventions, and outputs clearly so users can understand how a result is derived rather than treating the calculation as a black box.
Privacy by Design
Bond calculations on accruedinterest.com are designed to run directly in your browser.
Calculation inputs and results are not sent to the site operator for server-side processing. There are no user accounts, registrations, or logins required to use the calculators.
This approach keeps the core tools simple and minimizes the amount of information the site needs to handle.
Who the Site Is For
The tools are intended for anyone working with or learning about fixed income, including:
- finance professionals
- analysts
- students and educators
- investors
- treasury and operations professionals
- anyone who wants to understand bond calculations
The site is free to use for personal, educational, and professional purposes, subject to the Terms of Use.
Independent and Practical
accruedinterest.com is an independent website and is not affiliated with Bloomberg, Refinitiv, ISDA, ICMA, or any other financial institution, data vendor, standards body, exchange, or trading platform unless expressly stated otherwise.
Certain calculations and conventions may be based on widely used public market standards and established fixed-income methodologies.
The site is intended as a practical calculation and educational resource. It is not a pricing service, settlement system, trading platform, or source of investment advice.
Accuracy and Limitations
Care is taken to make the calculators useful and consistent with common market conventions. However, individual securities may contain instrument-specific terms, unusual coupon structures, settlement conventions, or documentation that cannot be fully represented by a general-purpose calculator.
Results should therefore be independently verified before being used for trading, settlement, valuation, accounting, or other professional decisions.
For further information, please review the site’s Financial Disclaimer, Terms of Use, and Privacy Policy.
Last updated: April 2026