Free calculators and utilities for everyday work
BK Tools brings together calculators, converters, developer utilities, text tools and business-analysis templates in one searchable catalogue. Open a tool directly, enter the required values and get a result without creating an account.
Designed for privacy and speed
Most tools run entirely in your browser, so the values and text you enter are not sent to our server. Tools that use current reference data state their source and update period on the relevant page.
Browse by task
Use finance tools for percentages and interest, developer tools for JSON and code formatting, date tools for intervals and workdays, and analysis tools for decision matrices, RACI, MoSCoW and release planning.