How do I get boost from MAP?

Boost = absolute pressure − ~101.3 kPa atmospheric.

MAP Sensor Voltage to Pressure Calculator

MAP Sensor → Pressure

Convert MAP sensor voltage to absolute pressure and boost via two-point calibration.

Preset

V at point 1

kPa at point 1

V at point 2

kPa at point 2

Measured voltage (V)

How it works

Set calibration

Pick a preset, or enter your sensor's two voltage/pressure points from its datasheet.

Enter measured volts

Type the voltage you logged from the MAP sensor signal wire.

Read pressure & boost

Get absolute pressure in kPa/bar/psi and the boost above atmospheric.

Frequently asked questions

How do MAP sensors work?

Most automotive MAP sensors are linear: output voltage rises in proportion to absolute manifold pressure. Two known voltage/pressure points define the whole line.

How do I get boost from a MAP reading?

Boost = absolute pressure − atmospheric (~101.3 kPa). The tool subtracts atmospheric and shows the result in psi and bar.

What is a 3-bar MAP sensor?

It reads up to ~3 bar absolute (about 2 bar / 29 psi of boost). Bigger builds need 3-bar or 4-bar sensors and the matching ECU scaling.

Need the full ECU suite?

The desktop Softechpro Solutions software corrects checksums for 260+ ECU families and does DPF/EGR/AdBlue/DTC off, Stage tuning and DTC diagnostics offline.

See pricing — €299 one-time