Slovin's Formula Calculator

n = N / (1 + Ne²)

n = Sample Size • N = Population Size • e = Margin of Error

Population Size (N) (Total people/items)

Margin of Error (e) (In percentage)

Required Sample Size

0% of total population

Population (N)

Confidence Level

95%

Margin of Error

Step 1: Convert margin to decimal:e = 0.05

Step 2: Square the margin:e² = 0.0025

Step 3: Multiply by population:N × e² = 2.5

Step 4: Add 1:1 + Ne² = 3.5

Step 5: Divide population by result:n = 1000 / 3.5

Final Sample Size:n ≈ 286