Rounding Decimals Calculator

Rounding decimals is a fundamental mathematical operation used in everyday calculations, scientific work, financial calculations, and academic settings. This calculator makes it easy to round any decimal number to your desired precision.

Why Round Decimals?

• Simplify complex calculations
• Match required precision in scientific work
• Format currency and financial data
• Meet academic or reporting requirements
• Improve readability of numbers

Rounding Rules

• If the digit after your rounding position is 5 or greater: Round up
• If the digit after your rounding position is less than 5: Round down
• Example: 3.145 rounded to 2 decimals = 3.15 (5 rounds up)
• Example: 3.144 rounded to 2 decimals = 3.14 (4 rounds down)

Common Use Cases

Money & Finance: Round to 2 decimal places for cents (e.g., $12.456 → $12.46)

Scientific Measurements: Round to required precision (e.g., 3.14159 → 3.142 for 3 decimals)

Academic Work: Follow assignment requirements for decimal precision