# 📟 Calculators

A compilation of useful clinical calculators

The 6-min walk test is used across rehabilitation settings as a measure of physical function. Due to its simplicity, it can be used in substitute of more complex measures that require more complex equipment.

This study by Enright & Sherrill in 1998 outlines a regression model that can be used to predict normative values based on patient age, height, weight, and sex.

I created a Google Sheet calculator where you can input patient characteristics and generate predicted norms. Give it a shot!

This simple Body Mass Index calculator spreadsheet can replace other online resources that calculate BMI. It can be copied into other more commonly-used spreadsheets as a reference spreadsheet

Body Mass Index is calculated with the formula, BMI = kg / m^2, and classifications are based on the most current guidelines from the World Health Organization.

Use this sheet to find blood pressure classifications based on the newest AHA Guidelines.

Note: 120/80 is now considered **Stage 1 Hypertension**. See why in the sheet.

This table is based on classification data from the ADA Guidelines regarding popular diagnostic tests for Diabetes.

A1C, Fasting Glucose, and 2-Hour Glucose Tolerance Testing data are all included.

This exercise intensity calculator allows you to determine heart rate ranges based on Age, Max Heart Rate, and Resting Heart Rate.

It utilizes two common formulas used to derive HR Max:

[220 - Age]

[208 - Age x 0.7]

It also uses Karvonen's formula, which calculates a target HR based on pre-selected intensity levels.

Here is a calculator I put together for Return-To-Sport testing after injury. Included are various measures for four popular hop tests with built-in calculations for side-to-side differences.

Sensitivity, specificity, and likelihood ratios can be tricky concepts to understand and apply. This calculation sheet can help you better understand the meaning behind these terms.

Included in this sheet is a 2x2 table complete with calculations for the following:

**Sensitivity**

- The proportion of people
**WITH**the condition who get a (+) test. Also known as the**True Positive Rate**.

**Specificity**

- The proportion of people
**WITHOUT**the condition who get a (-) test. Also known as the**True Negative Rate**.

**Positive Likelihood Ratio**

- How much the odds of the condition
**increase**based on a (+) test

**Negative Likelihood Ratio**

- How much the odds of the condition
**decrease**based on a (-) test

**Positive Predictive Value**

- If (+) test, the probability of having the condition

**Negative Predictive Value**

- If (-) test, the probability of NOT having the condition

**Diagnostic Odds Ratio**

- Ratio of odds of (+) test if (+) for condition relative to the odds of (+) if (-) for condition.

**Risk Ratio**

- Ratio of the probability of an outcome in an exposed group to the probability of an outcome in an unexposed group.

The Short Physical Performance Battery is a useful assessment of static balance, gait speed, and functional strength. It can paint an effective picture of someone's functional mobility, and can be used in a variety of clinical settings.

For more about the test, please visit this link.

The Star Excursion Balance Test and Y-balance test are incredibly useful in many clinical settings, though administering these tests can be burdensome. Use this table to easily calculate averages and side-to-side differences with each of these tests.

Calculate days, weeks, and months since surgery or injury with this simple spreadsheet.

This spreadsheet makes use of the =TODAY() function on Google Sheets, which is helpful for tracking a variety of data, as it returns today's date in a cell and updates each day.