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Use our free Systemic Vascular Resistance Calculator to calculate SVR, Cardiac Output, and MAP instantly with formulas, examples, and accurate results.
A healthy heart keeps blood moving through your body. Blood must travel through many blood vessels. Some vessels are wide. Others are narrow. This creates resistance.
Systemic Vascular Resistance, or SVR, measures that resistance. Doctors often use SVR and a Cardiac Output Calculator to understand how hard the heart works to push blood through the body's blood vessels.
Our Systemic Vascular Resistance calculator makes this job easy. You don't need to solve the formula by hand. Enter your numbers, and the calculator does the math for you in seconds.
The calculator also works in reverse. It can find Cardiac Output (CO) or Mean Arterial Pressure (MAP) when you know the other values.
Systemic Vascular Resistance shows how much resistance blood meets as it flows through the body's circulation.
Think of a garden hose. Water flows easily through a wide hose. Now pinch the hose. Water meets more resistance. Blood acts much the same way inside your blood vessels.
A high SVR means blood vessels are tighter. The heart must work harder.
A low SVR means blood vessels are wider. Blood flows more easily.
Doctors use SVR when checking heart function, blood pressure, shock, and other circulation problems.
The standard formula is:
Systemic Vascular Resistance (SVR) = ((Mean Arterial Pressure (MAP) − Central Venous Pressure (CVP)) × 80) ÷ Cardiac Output (CO)
Where:
The result is measured in dyn·s·cm⁻⁵.
The calculator can also solve the formula in reverse.
To calculate Cardiac Output:
Cardiac Output (CO) = ((MAP − CVP) × 80) ÷ SVR
To calculate Mean Arterial Pressure:
Mean Arterial Pressure (MAP) = (SVR × CO ÷ 80) + CVP
Using the calculator is quick.
The calculator instantly shows:
You can also switch modes to calculate CO or MAP using the same tool.
Let's solve one example.
Given:
Mean Arterial Pressure (MAP) = 90 mmHg
Central Venous Pressure (CVP) = 10 mmHg
Cardiac Output (CO) = 5 L/min
Step 1
Find the pressure gradient.
Pressure Gradient = MAP − CVP
Pressure Gradient = 90 − 10
Pressure Gradient = 80 mmHg
Step 2
Divide by Cardiac Output.
80 ÷ 5 = 16
This equals 16 Wood Units.
Step 3
Multiply by 80.
16 × 80 = 1280 dyn·s·cm⁻⁵
Final Result:
Systemic Vascular Resistance = 1280 dyn·s·cm⁻⁵
This value is slightly above the normal range.
Our Systemic Vascular Resistance calculator gives fast and accurate results using the accepted clinical formula. It also helps you calculate Cardiac Output and Mean Arterial Pressure with ease.
The calculator explains every step, so you can understand how the answer was found. Whether you're a student, nurse, doctor, or healthcare worker, this tool saves time and reduces calculation errors.
If you need a quick and reliable SVR calculation, this calculator is a simple solution.
A Systemic Vascular Resistance calculator is an online tool that calculates SVR using Mean Arterial Pressure, Central Venous Pressure, and Cardiac Output.
A normal SVR usually ranges from 800 to 1200 dyn·s·cm⁻⁵.
SVR is commonly measured in dyn·s·cm⁻⁵. It can also be shown in Wood Units (WU).
You need:
Mean Arterial Pressure (MAP)
Central Venous Pressure (CVP)
Cardiac Output (CO)
Yes. The calculator can calculate Cardiac Output when you enter SVR, MAP, and CVP.
Yes. It can calculate Mean Arterial Pressure when you enter SVR, Cardiac Output, and Central Venous Pressure.
The number 80 converts the result from Wood Units into dyn·s·cm⁻⁵, which is the standard medical unit for Systemic Vascular Resistance.
Yes. The calculator uses the standard clinical formula accepted in cardiovascular medicine. It performs the calculations automatically and displays the result with step-by-step working.