ROUNDDOWN Google Sheet Formula

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ROUNDDOWN Formula Syntax

=ROUNDDOWN(3.14159, 2)

Example Use Case

Rounding a number down to a specified decimal place for conservative estimates

Understanding the ROUNDDOWN Formula

The ROUNDDOWN function in Excel forces a number down to a specified number of decimal places, always truncating toward zero regardless of value. It’s a conservative rounding tool, great for ensuring numbers don’t overshoot in budgets or measurements.

ROUNDDOWN(3.14159, 2) returns 3.14, ignoring the 0.00159. It takes two arguments: the number and digits, mirroring ROUND but with a downward bias—similar to FLOOR but with decimal flexibility.

Why Use ROUNDDOWN?

ROUNDDOWN keeps values low—think safety margins, cost estimates, or data truncation. Its predictable downward rounding ensures you stay under limits, offering precision without exaggeration.