Taxa Mensal → Anual
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
equivalência
About this calculator
The monthly to annual interest rate calculator is a useful tool to calculate the annual interest rate equivalent to a monthly interest rate. It uses the formula (1+i_m)^12 − 1, where i_m is the monthly interest rate.
This calculator is especially useful in cases where you need to convert monthly interest rates to annual interest rates, such as in the calculation of compound interest or the calculation of return on investment.
Remember that the equivalent annual interest rate may differ from the nominal annual interest rate, especially when the monthly interest rate is high. It's essential to consider common precautions when using this calculator, such as the accuracy of input data and the possibility of compound interest.
Frequently asked questions
What is the equivalent annual interest rate?
The equivalent annual interest rate is the annual interest rate that produces the same value of interest as the given monthly interest rate. It is calculated using the formula (1+i_m)^12 − 1.
How do I know if the equivalent annual interest rate is high or low?
The equivalent annual interest rate is high if the monthly interest rate is high. This occurs because the equivalent annual interest rate is calculated based on the monthly interest rate, which is multiplied by 12.
Can I use this calculator to calculate compound interest?
Yes, this calculator can be used to calculate compound interest. However, it's essential to consider common precautions when using this calculator, such as the accuracy of input data and the possibility of compound interest.