### Pregnancy

Use the pregnancy calculator to estimate conception and due dates as well as fetal development.

#### Estimate conception and due dates:

#### Calculate fetal development:

### General Clinical Medicine

Find formulas used in general clinical medicine. Compute the size of a catheter from the flow rate and pressure or find your free water deficit based on your body weight and serum sodium level.

#### Compute catheter radius from flow rate and other data:

#### Compute free water deficit:

### Cardiopulmonary Medicine

Look up cardiovascular and respiratory formulas, including ventricular pumping rate, oxygen delivery rate, peak expiratory flow, respiratory quotient and oxygen index.

#### Estimate ventricular pumping rate:

#### Interactively calculate oxygen delivery rate:

#### Make expiratory calculations:

#### Compute a corrected QT interval:

#### Look up a formula and use it interactively:

### Pediatrics

Use growth charts and other measurement data to compare the physical development of children. Find weight and height distributions or compute the projected growth of your child.

#### Use an interactive growth chart:

#### Calculate projected growth:

#### Compute pediatric tracheal tube size:

### Blood Chemistry

Compute hemodynamics, such as plasma glucose, blood oxygen level, serum osmolarity and oxygen saturation, in the circulatory system.

#### Compute mean plasma glucose from HbA1c level:

#### Compute blood oxygen level:

#### Plot an oxygen saturation curve:

#### Look up the formula and compute with it interactively:

### Nephrology

Assess kidney function using nephrology formulas that calculate peak urine flow rate and creatinine clearance.

#### Calculate peak urinary flow:

#### Calculate creatinine clearance:

### Endocrinology

Explore formulas to assess hormone levels. Free and bioavailable testosterone can be computed from serum albumin, testosterone and sex hormone–binding globulin levels.

#### Compute free and bioavailable testosterone:

### Apgar Scores

An Apgar score is a measure of the overall condition of a newborn at birth. Skin color, heart rate, reflexes, muscle tone and respiration are criteria used for the scoring.

#### Compute an Apgar score from given characteristics: