Fractions to Decimals Calculator: Fast and Fun Math

What it does

The calculator divides numerator by denominator using standard floating-point division — no rounding is applied, so the result is whatever JavaScript's division produces.

Worked examples

• 3 / 4 = 0.75 (terminates cleanly, since 4 = 2²)
• 1 / 3 = 0.3333333333333333 (repeating, shown to JavaScript's default float precision — 16 digits)
• 7 / 8 = 0.875

Terminating vs. repeating decimals

A fraction produces a terminating decimal only when the denominator's prime factors are limited to 2s and 5s (since decimal is base 10 = 2×5). Denominators like 3, 6, 7, 9, or 11 introduce repeating digits, which is why 1/3 and 1/6 never come out even. Because this tool doesn't round, dividing by a repeating-decimal denominator will fill the result field with a long string of digits rather than the "0.33" you'd write by hand.

Edge case

Entering 0 as the denominator returns "Cannot divide by zero" rather than Infinity or NaN — the script checks for that before doing the division.