Leave the field blank that you wish to solve for.

This simple loan calculator lets you solve for the Principal, Rate, Term, or Payment for a **fixed-rate** loan or mortgage. The calculator estimates the **Total Interest** paid over the course of the loan.

The payment includes Principal+Interest, but not Insurance and Property taxes. It does not take into account rounding, so the estimate may be off be a few dollars. Note also that the "bi-weekly" payment option is not the same as "accelerated bi-weekly" payments, in which an extra payment is made.

Solving for the **Rate** requires iteration, and there may be zero or more solutions. When the solver fails to converge, you'll get an error such as "Could not solve for Rate". The rate is rounded to the 6th decimal place.

Note: Values returned by this calculator may not be exact, due to rounding or truncation errors. Also, this calculator assumes the compounding period is the same as the payment frequency.

If you use Excel, try our Simple Loan Calculator for Excel