Mathematics
Percentages, rule of three, fractions, powers, roots, averages, proportion, GCD, LCM and rounding.
Everyday arithmetic is rarely hard; not swapping the order of operations is. These calculators show the formula being applied and keep full precision until display — rounding appears only at the end, never in the middle of the account. So 12.5% of 333.33 is exactly 41.66625 before it becomes 41.67 on screen, and a chained calculation does not accumulate rounding error.
How to use these calculators
- 1Pick the operation and enter the values; an empty field is treated as not provided, not as zero.
- 2Check the formula shown before moving the number into a spreadsheet or document.
- 3In proportions, keep the units equal on both sides: 3/4 and 30/40 are the same ratio.
Applications in this category
Each application groups related functions on one page, with a guide for each one.
Calculators in this field
1 calculatorsFrequently asked questions
Why does the result show so many decimals?
Because rounding is applied only when displaying. Keeping precision stops a chained calculation from multiplying the error.
Does the tool accept a decimal comma?
Yes. Both 1,234.56 and 1.234,56 are accepted, and the result follows the page language format.