Day Count Calculator

Calculate day count fractions used in financial interest calculations.

  • Free Online Tool
  • Instant Results
  • Mobile Friendly
  • No Installation
  • Secure & Private

Understanding This Calculator

Day Count Conventions

Standard financial methods for calculating interest accrual.

  • Actual/365: Counts actual days, divides by 365 (used in UK, Canada government bonds).
  • Actual/360: Counts actual days, divides by 360 (money markets).
  • 30/360: Assumes every month has 30 days (corporate bonds).

Example 1

Jan 1 to Feb 1 (31 days).

  • Actual/365 = 31/365 ≈ 0.0849
  • 30/360 = 30/360 = 0.0833

How to Use

  • Enter start and end dates.

Frequently Asked Questions

How do I use the Day Count Calculator (Finance)?

Enter your values in the input fields, and the result will appear instantly.

Is this calculator free to use?

Yes, this calculator is 100% free and does not require any registration or subscription.

Is it mobile-friendly?

Absolutely! Our tool is optimized for all devices, including mobile phones, tablets, and desktop computers.