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Calculate stroke volume instantly with our free Stroke Volume Calculator. Use EDV, ESV, CO, or HR to get accurate results, formulas, and easy calculation steps.
| Parameter | Normal Range | Reduced | Notes |
|---|---|---|---|
| Stroke Volume | 60 – 100 mL/beat | < 60 mL/beat | At rest in average adult; higher in athletes |
| SV Index (SVI) | 33 – 47 mL/m² | < 33 mL/m² | Body surface area-indexed; more comparable across patients |
| EDV (LV) | 100 – 150 mL | — | Dilated if >150 mL |
| ESV (LV) | 40 – 60 mL | — | Elevated ESV suggests impaired emptying |
| Ejection Fraction | ≥ 55% | < 40% = reduced | 40–54% = mildly reduced; <40% = HFrEF |
| Cardiac Output | 4 – 8 L/min | < 4 L/min | CO = SV × HR; indexed CI = 2.5–4 L/min/m² |
| Formula | Expression | When to Use |
|---|---|---|
| EDV − ESV | SV = EDV − ESV | Volumes from echo (Simpson's), MRI, or nuclear |
| CO ÷ HR | SV = CO (mL/min) ÷ HR | CO from thermodilution, Fick, or echo-derived CO |
| Echo LVOT | SV = π(D/2)² × VTI | Doppler echo: pulsed-wave in LVOT |
| Related: CO | CO = SV × HR | Derived cardiac output from SV and HR |
| Related: EF | EF (%) = (SV ÷ EDV) × 100 | Only applicable when EDV is known (mode 1) |
A Stroke Volume Calculator helps you find the amount of blood your heart pumps with each beat. It gives fast and accurate results. You only need a few values. The calculator does the math for you.
Our free Stroke Volume Calculator is simple to use. It works for students, nurses, doctors, fitness experts, and anyone who wants to learn about heart health. You can calculate stroke volume using the standard EDV and ESV method. You can also use cardiac output and heart rate or the echocardiography LVOT method.
Stroke volume is the amount of blood the left ventricle pumps during one heartbeat. It is measured in milliliters per beat (mL/beat).
Think of your heart like a water pump. The pump fills with water first. Then it pushes part of that water out. Stroke volume is the amount pushed out with one pump.
A healthy adult usually has a resting stroke volume between 60 and 100 mL per beat. The value may change with age, exercise, fitness level, and heart health.
Doctors often use stroke volume to check how well the heart works. It is also used with heart rate to calculate cardiac output.
There are three common ways to calculate stroke volume.
Stroke Volume (SV) = End-Diastolic Volume (EDV) − End-Systolic Volume (ESV)
Where:
EDV = Blood volume in the ventricle before contraction
ESV = Blood volume left after contraction
This is the most common and widely accepted formula.
Stroke Volume (SV) = Cardiac Output (CO) ÷ Heart Rate (HR)
If cardiac output is given in liters per minute, convert it to milliliters first.
1 L = 1000 mL
LVOT Area = π × (LVOT Diameter ÷ 2)²
Stroke Volume (SV) = LVOT Area × Velocity Time Integral (VTI)
This method is often used during Doppler echocardiography.
You can calculate stroke volume in several ways.
The easiest method uses EDV and ESV.
First, find the end-diastolic volume. Next, find the end-systolic volume. Then subtract ESV from EDV. The answer is your stroke volume.
If you know cardiac output and heart rate, divide cardiac output by heart rate.
If you have LVOT diameter and VTI values from an echocardiogram, calculate the LVOT area first. Then multiply the area by VTI.
Our Stroke Volume Calculator performs every calculation instantly. You do not need to remember the formulas or solve the equations yourself.
Using the calculator is quick and simple.
The calculator instantly shows your stroke volume in mL per beat.
It also displays extra information, such as ejection fraction or cardiac output, when enough data is available.
Example 1
End-Diastolic Volume = 120 mL
End-Systolic Volume = 50 mL
Stroke Volume = 120 − 50
Stroke Volume = 70 mL per beat
Example 2
Cardiac Output = 5 L/min
Heart Rate = 70 beats per minute
Convert cardiac output.
5 L/min = 5000 mL/min
Stroke Volume = 5000 ÷ 70
Stroke Volume = 71.4 mL per beat
Example 3
LVOT Diameter = 2.0 cm
Velocity Time Integral = 20 cm
LVOT Area = 3.1416 × (2.0 ÷ 2)²
LVOT Area = 3.1416 cm²
Stroke Volume = 3.1416 × 20
Stroke Volume = 62.8 mL per beat
Our calculator saves time. It also reduces calculation mistakes.
It uses accepted medical formulas. The results are fast and easy to understand.
The calculator works well for medical students, healthcare workers, teachers, researchers, and patients who want to learn more about heart function.
Because it supports several calculation methods, you can use the one that matches your available data.
A Stroke Volume Calculator makes heart calculations simple. It helps you measure how much blood the heart pumps with each beat. You can use EDV and ESV, cardiac output and heart rate, or echocardiography measurements.
Our calculator gives quick and reliable results. It also shows the calculation steps, so you can understand how each answer is produced. Whether you study medicine or simply want to learn more about your heart, this tool makes the process easy.
A healthy adult usually has a resting stroke volume between 60 and 100 mL per beat.
Subtract end-systolic volume from end-diastolic volume.
Stroke Volume = EDV − ESV
Yes. Divide cardiac output by heart rate.
Stroke Volume = CO ÷ HR
Remember to convert liters per minute into milliliters per minute before calculating.
Stroke volume is measured in milliliters per beat (mL/beat).
Stroke volume shows how much blood your heart pumps with each beat. Doctors use it to evaluate heart function, monitor treatment, and estimate cardiac output.
Yes. Our calculator uses standard clinical formulas that are widely accepted in cardiology and physiology. The result depends on entering accurate measurements.