উল্লেখযোগ্য সংখ্যা ক্যালকুলেটর

এই ক্যালকুলেটর কীভাবে ব্যবহার করবেন

1. Number লিখুন
2. Round to N Sig Figs লিখুন
3. গণনা করুন বোতামে ক্লিক করুন
4. ক্যালকুলেটরের নিচে প্রদর্শিত ফলাফলটি পড়ুন

What are Significant Figures?

Significant figures (sig figs) are the meaningful digits in a measurement. They indicate the precision of a value. Rules for counting sig figs:

• All non-zero digits are significant (e.g., 123 has 3 sig figs)
• Zeros between non-zero digits are significant (e.g., 1001 has 4 sig figs)
• Leading zeros are NOT significant (e.g., 0.005 has 1 sig fig)
• Trailing zeros after a decimal point ARE significant (e.g., 1.500 has 4 sig figs)
• Trailing zeros without a decimal point are ambiguous (e.g., 100 might have 1, 2, or 3 sig figs)

How to Round to Significant Figures

To round 0.004567 to 3 significant figures:

1. Identify the first significant figure: 4 (the leading zeros don't count)
2. Count 3 significant figures from there: 4, 5, 6
3. Look at the next digit (7): since 7 ≥ 5, round up the last kept digit
4. Result: 0.00457

When rounding large numbers, use scientific notation to avoid ambiguity. For example, 12,345 rounded to 3 sig figs = 1.23 × 10⁴ = 12,300.

Sig Figs in Calculations

When performing calculations, the result should be rounded to match the precision of the least precise input:

• Multiplication/Division: The result has as many sig figs as the input with the fewest sig figs. 2.1 × 3.45 = 7.245, rounded to 2 sig figs = 7.2
• Addition/Subtraction: The result has as many decimal places as the input with the fewest decimal places. 1.23 + 4.1 = 5.33, rounded to 1 decimal = 5.3