Graphite
Classic tools
Four general tools, kept because the previous calculator.pro pointed a lot of old links at them. They are not the point of the site.
Scientific Calculator
Scientific calculator for arithmetic, powers, roots, and trigonometry. Degrees or radians. The expression stays in the address bar.
Mortgage Calculator
Mortgage calculator for a fixed-rate loan. Principal and interest, tax, insurance, HOA, extra principal, and the amortization schedule.
Decimal, Binary, and Hex Converter
Convert decimal, binary, octal, and hexadecimal, with grouped bits and a two’s-complement view.
BMI Calculator
Body mass index calculator in US customary or metric units, with the WHO adult categories. A screening index, not a diagnosis.
How these calculators work
The scientific calculator parses an expression. It does not send it to a server. The mortgage tool is the standard fixed-rate annuity. BMI uses the CDC customary formula and the WHO adult cutoffs, and it is a screening index, not a diagnosis. The base converter speaks decimal, binary, octal, and hex, including a fixed-width two’s complement view.
Older currency-converter and ovulation URLs redirect to the homepage. This site does not run a live exchange-rate feed, and it does not publish medical calculators.