Numbers & Converter Tools

Choose the specialist tool for the job

The Age Calculator handles calendar-age questions, the Unit Converter handles supported measurements, the Roman Numeral Converter handles modern Roman numeral conversion, and the Binary & Hex Converter handles exact integer base conversion. This page is the directory that helps you choose between them.

Precision matters

A displayed result can be more precise than the original measurement. When an input is rounded, estimated or measured with limited equipment, keep an appropriate number of decimal places in the final answer. Temperature conversions and calendar calculations also use rules that differ from ordinary multiplication, so use the dedicated tool rather than a memorised shortcut.

Check the required standard

Engineering, scientific, legal and commercial work may specify a particular unit definition, rounding method or date convention. ToolBullet provides general-purpose conversions; verify critical results against the standard used by your organisation or jurisdiction.