Number tools

Convert measurements, calculate everyday numbers or make a random choice. Free tools that work in your browser.

Find a tool

Random selection

Generate integers within an inclusive range. Choose how many you need, allow or prevent repetitions and exclude specific values. Useful for exercises, informal selections and test data.

Random name picker

Paste a list and select one or more names at random. Each non-empty line is one entry; identical lines can be removed before selection. People with the same name can be distinguished with a label.

Random team generator

Divide a list into randomly assigned teams. Every person is assigned once and team sizes differ by at most one. Suitable for classroom exercises, workshops and friendly activities.

Shuffle a list

Randomise the order of names, topics or tasks while retaining every entry. Useful for presentation order and practice questions. Removing duplicate lines is optional.

Everyday calculators

Percentages and discounts

Find a percentage of a value, calculate a discounted price, apply an increase or compare an old and new value. Select the calculation before entering the numbers.

Split expenses equally

Divide one total equally among a group. The calculation keeps two decimal places and distributes any leftover cents, so the shares add up exactly. Use amounts expressed in the same currency.

Days between dates

Count the calendar days between two dates. Choose whether to include both endpoints. This is useful for project durations and personal planning; it is not an extraction calendar.

Number base converter

Convert an integer between binary, octal, decimal, hexadecimal and other bases from 2 to 36. Large integers are processed exactly, without floating-point rounding. Useful for studying positional notation.