Base Converter Online | Fast & Easy Number Conversions | Try Now!
Effortlessly convert numbers between bases with our simple, reliable base converter. Fast results for all your conversion needs. Try it now!
Convert between decimal and scientific notation instantly. Type in either field to see the conversion.
Examples:
Type 0.00045 into the decimal field. The tool calls JavaScript's toExponential(10) on the number, producing 4.5000000000e-4, then strips the trailing zeros to give a clean 4.5e-4. To verify by hand: 4.5 × 10⁻⁴ = 4.5 ÷ 10,000 = 0.00045 — moving the decimal point 4 places left from 4.5 to reconstruct the original number.
Type 3500000 into the decimal field and the scientific field updates to 3.5e+6. Checking it: 3.5 × 10⁶ = 3.5 × 1,000,000 = 3,500,000. The exponent (6) equals the number of places the decimal point moved to get the mantissa (3.5) between 1 and 10.
There's no Convert button — the tool listens for input in either field and updates the other live. Typing directly into the scientific field, e.g. 2.5e5, fills in the decimal field with 250000 (2.5 × 100,000 = 250,000). For very large exponents (roughly 1e21 and above), JavaScript's own number formatting switches back to exponential notation regardless, since expanding it as plain digits would exceed the precision the format can represent reliably — so extremely large or small scientific values may echo back close to their original form rather than a fully expanded string.
Commas in the decimal field are stripped automatically before parsing, so "3,500,000" and "3500000" both work. Text that isn't a valid number in either field produces an inline message rather than a silent failure.
Effortlessly convert numbers between bases with our simple, reliable base converter. Fast results for all your conversion needs. Try it now!
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