dip switch calculator

Convert between decimal values and DIP switch positions. Set your switch count, enter a value, then generate ON/OFF states. You can also toggle switches directly to read the resulting decimal, binary, and hex value.

Number of switches (1–24)

Target decimal value

Active-low mode (physical ON = logical 0)

Ready.

What is a DIP switch calculator?

A DIP switch calculator helps you quickly convert a numeric setting into physical switch positions. DIP switches are common in embedded systems, industrial control hardware, communication interfaces, and legacy electronics. Instead of guessing which tiny toggles should be ON or OFF, a calculator maps the number for you instantly.

This is especially useful when you are configuring:

Device addresses (for RS-485 nodes, controllers, sensors, and relays)
Operating modes and feature flags on control boards
Baud rate and protocol options on serial hardware
Calibration offsets or startup behavior in older devices

How DIP switch values work

Most DIP switches are binary weighted. Each switch has a value based on powers of two:

Switch 1 = 1
Switch 2 = 2
Switch 3 = 4
Switch 4 = 8
Switch 5 = 16
...and so on

If a switch is logically set to 1, its value is included in the total. Add all active values to get the final decimal number.

Example: decimal 13 on an 8-switch block

13 in binary is 00001101. That means bit weights 8, 4, and 1 are active. So, in active-high logic, switches for values 8, 4, and 1 are ON.

Active-high vs active-low (important)

Not every device treats ON as logical 1. Some boards are wired active-low, where physical ON actually means logical 0. That is why this calculator includes an Active-low mode checkbox:

Unchecked: ON = 1 (active-high)
Checked: ON = 0 (active-low)

Always confirm the logic convention in your device manual. The little “ON” marking on the DIP package only indicates lever direction, not necessarily logical meaning inside the circuit.

How to use this calculator

Method 1: Number to switches

Enter the number of switches on your board.
Type the decimal value you want.
Click Set switches from decimal.
Read the generated ON/OFF states.

Method 2: Switches to number

Toggle switch cards to match your physical board.
Click Read value from switches (or just toggle any switch).
The calculator outputs decimal, binary, and hexadecimal results.

Practical field tips

Power down first unless hot switching is explicitly supported.
Document settings before making changes.
Watch numbering orientation — SW1 location can differ between boards.
Use a photo log for maintenance records.
Check max value — an N-switch bank supports 0 to 2^N - 1.

Troubleshooting wrong readings

If the system reads the wrong address

Confirm active-high vs active-low logic.
Confirm switch numbering direction in the manual.
Verify no switch is halfway between positions.
Cycle power if the device only reads DIP states on boot.

If two devices conflict on a bus

They may share the same DIP-configured address. Recalculate each address and ensure every node is unique.

Final note

DIP switches are simple, reliable, and still widely used. A calculator like this removes manual conversion errors and speeds up setup in labs, plants, and field service work. If your hardware behaves unexpectedly, verify wiring logic and manufacturer documentation first—then use the calculator to confirm each bit setting.