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Use our free Cardiac Output Calculator to calculate cardiac output, heart rate, and stroke volume with formulas, examples, and easy steps.
Your heart works like a pump. It sends blood to every part of your body. Cardiac output tells you how much blood your heart pumps each minute.
Our free Cardiac Output Calculator makes this easy. You only need two values. The calculator does the math for you. It also explains each step. You can calculate cardiac output, stroke volume, or heart rate in just a few seconds.
Whether you're a student, nurse, doctor, or simply curious, and considering costs with an Hourly Labor Cost Calculator, this calculator helps you get quick and reliable results.
Cardiac output is the amount of blood your heart pumps every minute.
Think of your heart as a water pump. Each beat pushes out a small amount of blood. The number of beats and the amount pumped together decide the total blood flow.
Cardiac output, which can also be related to the Cardiac Index Calculator, depends on two things.
Heart Rate (HR) tells you how many times your heart beats each minute.
Stroke Volume (SV) tells you how much blood leaves the heart with each beat.
When these two values increase, cardiac output usually increases too.
Cardiac output is measured in liters per minute (L/min).
The standard formula is simple.
Cardiac Output (L/min) = (Heart Rate × Stroke Volume) ÷ 1000
Where:
You can also rearrange the formula.
Stroke Volume = (Cardiac Output × 1000) ÷ Heart Rate
Heart Rate = (Cardiac Output × 1000) ÷ Stroke Volume
These formulas are widely used in medicine, physiology, and nursing.
You can calculate cardiac output in four simple steps.
First, find your heart rate in beats per minute.
Next, find your stroke volume in milliliters per beat.
Then, multiply the two numbers.
Finally, divide the answer by 1000.
The result is your cardiac output in liters per minute.
Our calculator performs every step for you. It also shows the complete calculation so you can understand how the answer was found.
Using the calculator is quick and simple.
You'll also see the complete calculation steps, the formula used, and whether your result falls within the normal range.
Let's use a simple example.
Heart Rate = 72 bpm
Stroke Volume = 70 mL/beat
Multiply the values.
72 × 70 = 5040 mL/min
Now divide by 1000.
5040 ÷ 1000 = 5.04 L/min
The cardiac output is 5.04 L/min.
The calculator also lets you work backward. If you already know cardiac output, it can find heart rate or stroke volume for you.
A healthy adult usually has a resting cardiac output between 4 and 8 liters per minute.
An average value is about 5 liters per minute.
Many things can affect cardiac output.
Exercise can increase it.
Stress can also raise it.
Some heart conditions may lower it.
Your age, fitness level, and overall health also play a role.
This is why cardiac output should always be viewed with your health history and medical advice.
Knowing your cardiac output helps you understand how well your heart pumps blood.
Doing the math by hand takes time. Small mistakes can happen.
Our Cardiac Output Calculator gives fast, clear, and accurate results. It also explains each calculation step, making it useful for learning and everyday reference.
Whether you're studying, working in healthcare, or simply learning about heart health, this calculator is an easy and reliable tool.
A Cardiac Output Calculator is an online tool that calculates the amount of blood your heart pumps each minute. It can also calculate heart rate or stroke volume when the other values are known.
Multiply heart rate by stroke volume. Then divide the result by 1000.
Cardiac Output = (Heart Rate × Stroke Volume) ÷ 1000
Most healthy adults have a resting cardiac output between 4 and 8 L/min. The average value is about 5 L/min.
Heart Rate is measured in beats per minute (bpm).
Stroke Volume is measured in milliliters per beat (mL/beat).
Cardiac Output is measured in liters per minute (L/min).
Yes. Choose the Find Stroke Volume mode. Enter cardiac output and heart rate. The calculator will find stroke volume instantly.
Yes. Choose the Find Heart Rate mode. Enter cardiac output and stroke volume. The calculator will calculate your heart rate.
Yes. The calculator uses the standard cardiac output equations used in medicine, physiology, nursing, and healthcare education.