Frequently Asked Questions
Is Domathcalculator free?
Yes. All calculators and converters are free to use, with no registration. The site is supported by advertising.
Does the calculator work in degrees and radians?
Yes. Use the DEG/RAD key on the calculator to switch the angle mode for sin, cos, tan and their inverses.
How do I enter powers, roots and factorials?
Use ^ for powers (2^8), sqrt( ) or cbrt( ) for roots, and ! for factorials (5!). Parentheses can be nested to any depth.
Can I type with my keyboard?
Yes. Type expressions directly, press Enter to calculate and Escape to clear. On phones, use the on-screen keypad.
How accurate are the results?
Calculations use standard double-precision floating point (about 15–16 significant digits). Results are displayed to 12 significant digits.
Is my data sent to a server?
No. All calculations run in your browser. Calculator history is stored only in your own browser and can be cleared at any time.
Which units can I convert?
Length, mass, area, volume, time, speed, pressure, energy, power, force, angle, temperature and digital data.
Can I use the results for professional design work?
The tools are meant as a quick aid for study and everyday engineering. Always verify safety-critical results with approved methods and codes.
I found a mistake or have a feature request.
Please use the Contact page. We read every message and fix reported errors quickly.