Enter the red blood cell % and mean corpuscular volume (MCV) into the calculator to determine the hematocrit (HCT).

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## HCT Formula

The following formula is used to calculate a hematocrit:

HCT = RBC * MCV / 10

- Where HCT is the hematocrit
- RBC is the red blood cell percentage (%)
- MCV is the mean corpuscular volume

To calculate HCT, multiply the red blood cell percentage by the mean corpuscular volume, then divide by 10.

## HCT Definition

**What is HCT? **

HCT, short for hematocrit, is a blood test performed to determine the number of red blood cells in someone’s blood.

## Example Problem

How to calculate HCT?

**First, determine the red blood cell percentage (%).**For this example, the red blood cell percentage is found to be 47%.

**Next, determine the mean corpuscular volume.**For this problem, the mean corpuscular volume is found to be. 750 mL.

**Finally, calculate the hematocrit.**Using the formula above, the hematocrit is found to be:

HCT = RBC * MCV / 10

HCT = 47% * .750L / 10

HCT = 3.52%/L