Frequently Asked Questions
Answers to common questions about the free calculators and math tools on WhatMaths.
Is WhatMaths free to use?
Yes. Every calculator and tool on WhatMaths is completely free, with no account, no download, and no usage limits.
Does WhatMaths work on mobile phones?
Yes. All tools are fully responsive and work on phones, tablets, and desktops in any modern web browser.
Do I need to install anything?
No. WhatMaths runs entirely in your browser. There is nothing to install and no sign-up required.
Can the calculator solve equations step by step?
Yes. The Solve tab shows full working for linear, quadratic, and cubic equations, systems of two equations, and inequalities.
Does it support trigonometry and logarithms?
Yes. It supports sine, cosine, tangent and their inverses, natural log, log base 10, powers, roots, and factorials, in both degrees and radians.
Can I graph functions?
Yes. The Graph tab plots functions and lets you zoom in and out to study their shape.
How do I calculate a percentage of a number?
Multiply the number by the percentage divided by 100. For example, 20% of 150 is 150 times 0.20, which equals 30. The percentage calculator does this instantly.
Does the fraction calculator simplify answers?
Yes. Every fraction result is automatically reduced to its lowest terms.
How accurate are the unit converters?
The length and temperature converters use exact conversion factors, so results are precise for everyday and scientific use.
What does the loan calculator show?
It shows your monthly payment (EMI), the total interest paid, and the total amount repaid over the full loan term.
Is WhatMaths good for GED and school math?
Yes. It covers the arithmetic, algebra, geometry, and statistics commonly tested on the GED and in school, and includes GED and algebra formula sheets.
Is a formula sheet allowed on the GED test?
Yes. The GED provides an on-screen formula sheet during the Mathematical Reasoning test. Our formula pages mirror the key formulas so you can study them in advance.
Back to the scientific calculator, or contact us if your question is not answered here.