Science Calculators
Scientific notation, unit conversions, and lab helpers for students and professionals working with numbers at every scale.
Scientific measurements routinely span more than twenty orders of magnitude - from a hydrogen atom's radius (about 5.3 × 10⁻¹¹ m) to the diameter of the observable universe (about 8.8 × 10²⁶ m) - and writing either figure out in full decimal notation would be unreadable. Scientific notation solves this by separating a number's significant digits from its scale, which is also why it pairs naturally with the significant figures guide: the notation only makes sense once you know how many of those digits are actually meaningful.
Explore next: the log and exponent rules that scientific notation relies on, and why very large or very small results can lose precision in any calculator, including this one.
Every figure is checked against our engine before each build - see how this calculator is tested.