Free scale factor calculator to calculate scale factor. Instant results in your browser — no signup.
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Enter values and calculate an instant answer.
Enter the values, then calculate.
Results update when you click Calculate.
Primary answer and useful breakdowns.
Scale factor
2.5000
Enlargement
k = scaled / original = 25.00 / 10.00
Percent change
150.00%
Ratio
25.00 : 10.00
Free scale factor calculator to calculate scale factor. Instant results in your browser — no signup. Scale factor k = scaled length ÷ original length.
Scale factor k = scaled length ÷ original length.
10 → 25 gives scale factor 2.5 (150% increase).
Multiply area by k² when lengths scale by k.