About Online Calculator & Converter

Online Calculator & Converter is an independently owned and operated website that provides free calculators and unit converters for everyday math, money, home projects, dates and measurements.

Why Online Calculator & Converter exists

Many calculator sites hide the formula, mix up similar units (such as US and Imperial gallons) or bury the answer under long introductions. Online Calculator & Converter puts the tool first, shows the formula it uses, and explains assumptions and limits so you can judge whether the answer fits your situation.

What you will find

• Calculators for finance, math, geometry, construction, business and dates.
• Unit converters built on documented definitions, mainly from NIST Special Publication 811 and the SI Brochure.
• Worked examples, reference tables and answers to common questions on each tool page.

How tools are built and checked is described in the Methodology; how content is written and corrected is in the Editorial Policy.

Publisher

Online Calculator & Converter is an independently owned website. Questions and error reports: bjamidan@gmail.com.