This tool will calculate the total sales price including Missouri sales tax for any given amount.

## How to Use the Missouri Sales Tax Calculator

To use the calculator, enter the amount you wish to calculate the sales tax for, and then optionally enter the county and city tax rates if applicable. The state tax rate is pre-filled and cannot be changed. Click on “Calculate” to see the total amount including the tax.

## Explanation of the Calculation

The calculator takes the entered amount and applies the applicable state, county, and city tax rates. The state tax rate is fixed at 4.225%. If you enter county and city tax rates, they will be added to the state tax rate to find the total tax rate. The total tax amount is then computed and added to the original amount to get the final amount inclusive of tax.

## Limitations

This calculator has the following limitations:

- It does not account for special tax jurisdictions that may have additional taxes.
- It assumes the entered rates are the accurate current rates, so please verify them.
- It rounds the final result to two decimal places, which may cause minor inaccuracies for very high precision requirements.