Science Academy
☰✕

Mitotic Index Calculator

🔬 Cells & microscopy. Use the Mitotic index formula to find mitotic index, cells dividing, total cells counted: pick the value you want, type the others, and the answer updates as you go.

MI=cells dividingtotal cells×100%\text{MI} = \dfrac{\text{cells dividing}}{\text{total cells}} \times 100\%
Mitotic index12 %

Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.

What each letter means

QuantityUnit
Mitotic index%
Cells dividingno unit
Total cells countedno unit

Worked example

Find the mitotic index when Cells dividing = 18, Total cells counted = 150.

Using MI = (cells dividing)/(total cells) × 100\%: Mitotic index = 12 %.

Frequently asked questions

What is the formula for Mitotic index?

MI = (cells dividing)/(total cells) × 100\%.

What do the letters stand for, and what units are used?

Mitotic index in %, Cells dividing, Total cells counted.

How do you calculate mitotic index?

Put the values into MI = (cells dividing)/(total cells) × 100\%. For example, with Cells dividing = 18, Total cells counted = 150, mitotic index = 12 %.

Can I solve for a different value?

Yes. In the calculator above, pick the circle next to any value (mitotic index, cells dividing, total cells counted) and fill in the others: it rearranges the formula for you.

All biology formulas in the Biology Formulas